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DeviceTree for 4.13:

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- vsprintf format specifier %pOF for device_node's. This will enable us
   to stop storing the full node names. Conversion of users will happen
   next cycle.
 
 - Update documentation to point to DT specification instead of ePAPR.
 
 - Split out graph and property functions to a separate file.
 
 - New of-graph functions for ALSA
 
 - Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
   Itead, and BananaPi.
 
 - Improve dtx_diff utility filename printing.
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Merge tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - vsprintf format specifier %pOF for device_node's. This will enable us
   to stop storing the full node names. Conversion of users will happen
   next cycle.

 - Update documentation to point to DT specification instead of ePAPR.

 - Split out graph and property functions to a separate file.

 - New of-graph functions for ALSA

 - Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
   Itead, and BananaPi.

 - Improve dtx_diff utility filename printing.

* tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (32 commits)
  of: document /sys/firmware/fdt
  dt-bindings: Add RISC-V vendor prefix
  vsprintf: Add %p extension "%pOF" for device tree
  of: find_node_by_full_name rewrite to compare each level
  of: use kbasename instead of open coding
  dt-bindings: thermal: add file extension to brcm,ns-thermal
  of: update ePAPR references to point to Devicetree Specification
  scripts/dtc: dtx_diff - Show real file names in diff header
  of: detect invalid phandle in overlay
  of: be consistent in form of file mode
  of: make __of_attach_node() static
  of: address.c header comment typo
  of: fdt.c header comment typo
  of: make of_fdt_is_compatible() static
  dt-bindings: display-timing.txt convert non-ascii characters to ascii
  Documentation: remove overlay-notes reference to non-existent file
  dt-bindings: usb: exynos-usb: Add missing required VDD properties
  dt-bindings: Add vendor prefix for Linksys
  MAINTAINERS: add device tree ABI documentation file
  of: Add vendor prefix for iWave Systems Technologies Pvt. Ltd
  ...
This commit is contained in:
Linus Torvalds 2017-07-07 10:37:54 -07:00
commit dd6ec12f3b
49 changed files with 1211 additions and 910 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
Documentation/ABI/testing/sysfs-firmware-ofw
View File

@ -1,6 +1,6 @@
What: /sys/firmware/devicetree/*
Date: November 2013
Contact: Grant Likely <grant.likely@linaro.org>
Contact: Grant Likely <grant.likely@arm.com>, devicetree@vger.kernel.org
Description:
When using OpenFirmware or a Flattened Device Tree to enumerate
hardware, the device tree structure will be exposed in this
@ -26,3 +26,27 @@ Description:
name plus address). Properties are represented as files
in the directory. The contents of each file is the exact
binary data from the device tree.
What: /sys/firmware/fdt
Date: February 2015
KernelVersion: 3.19
Contact: Frank Rowand <frowand.list@gmail.com>, devicetree@vger.kernel.org
Description:
Exports the FDT blob that was passed to the kernel by
the bootloader. This allows userland applications such
as kexec to access the raw binary. This blob is also
useful when debugging since it contains any changes
made to the blob by the bootloader.
The fact that this node does not reside under
/sys/firmware/device-tree is deliberate: FDT is also used
on arm64 UEFI/ACPI systems to communicate just the UEFI
and ACPI entry points, but the FDT is never unflattened
and used to configure the system.
A CRC32 checksum is calculated over the entire FDT
blob, and verified at late_initcall time. The sysfs
entry is instantiated only if the checksum is valid,
i.e., if the FDT blob has not been modified in the mean
time. Otherwise, a warning is printed.
Users: kexec, debugging

15
Documentation/devicetree/bindings/arm/cci.txt
View File

@ -11,13 +11,6 @@ clusters, through memory mapped interface, with a global control register
space and multiple sets of interface control registers, one per slave
interface.
Bindings for the CCI node follow the ePAPR standard, available from:
www.power.org/documentation/epapr-version-1-1/
with the addition of the bindings described in this document which are
specific to ARM.
* CCI interconnect node
Description: Describes a CCI cache coherent Interconnect component
@ -50,10 +43,10 @@ specific to ARM.
as a tuple of cells, containing child address,
parent address and the size of the region in the
child address space.
Definition: A standard property. Follow rules in the ePAPR for
hierarchical bus addressing. CCI interfaces
addresses refer to the parent node addressing
scheme to declare their register bases.
Definition: A standard property. Follow rules in the Devicetree
Specification for hierarchical bus addressing. CCI
interfaces addresses refer to the parent node
addressing scheme to declare their register bases.
CCI interconnect node can define the following child nodes:

13
Documentation/devicetree/bindings/arm/cpus.txt
View File

@ -6,9 +6,9 @@ The device tree allows to describe the layout of CPUs in a system through
the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
defining properties for every cpu.
Bindings for CPU nodes follow the ePAPR v1.1 standard, available from:
Bindings for CPU nodes follow the Devicetree Specification, available from:
https://www.power.org/documentation/epapr-version-1-1/
https://www.devicetree.org/specifications/
with updates for 32-bit and 64-bit ARM systems provided in this document.
@ -16,8 +16,8 @@ with updates for 32-bit and 64-bit ARM systems provided in this document.
Convention used in this document
================================
This document follows the conventions described in the ePAPR v1.1, with
the addition:
This document follows the conventions described in the Devicetree
Specification, with the addition:
- square brackets define bitfields, eg reg[7:0] value of the bitfield in
the reg property contained in bits 7 down to 0
@ -26,8 +26,9 @@ the addition:
cpus and cpu node bindings definition
=====================================
The ARM architecture, in accordance with the ePAPR, requires the cpus and cpu
nodes to be present and contain the properties described below.
The ARM architecture, in accordance with the Devicetree Specification,
requires the cpus and cpu nodes to be present and contain the properties
described below.
- cpus node

4
Documentation/devicetree/bindings/arm/idle-states.txt
View File

@ -695,5 +695,5 @@ cpus {
[4] ARM Architecture Reference Manuals
http://infocenter.arm.com/help/index.jsp
[5] ePAPR standard
https://www.power.org/documentation/epapr-version-1-1/
[5] Devicetree Specification
https://www.devicetree.org/specifications/

4
Documentation/devicetree/bindings/arm/l2c2x0.txt
View File

@ -4,8 +4,8 @@ ARM cores often have a separate L2C210/L2C220/L2C310 (also known as PL210/PL220/
PL310 and variants) based level 2 cache controller. All these various implementations
of the L2 cache controller have compatible programming models (Note 1).
Some of the properties that are just prefixed "cache-*" are taken from section
3.7.3 of the ePAPR v1.1 specification which can be found at:
https://www.power.org/wp-content/uploads/2012/06/Power_ePAPR_APPROVED_v1.1.pdf
3.7.3 of the Devicetree Specification which can be found at:
https://www.devicetree.org/specifications/
The ARM L2 cache representation in the device tree should be done as follows:

4
Documentation/devicetree/bindings/arm/topology.txt
View File

@ -29,9 +29,9 @@ corresponding to the system hierarchy; syntactically they are defined as device
tree nodes.
The remainder of this document provides the topology bindings for ARM, based
on the ePAPR standard, available from:
on the Devicetree Specification, available from:
http://www.power.org/documentation/epapr-version-1-1/
https://www.devicetree.org/specifications/
If not stated otherwise, whenever a reference to a cpu node phandle is made its
value must point to a cpu node compliant with the cpu node bindings as

2
Documentation/devicetree/bindings/bus/simple-pm-bus.txt
View File

@ -10,7 +10,7 @@ enabled for child devices connected to the bus (either on-SoC or externally)
to function.
While "simple-pm-bus" follows the "simple-bus" set of properties, as specified
in ePAPR, it is not an extension of "simple-bus".
in the Devicetree Specification, it is not an extension of "simple-bus".
Required properties:

3
Documentation/devicetree/bindings/chosen.txt
View File

@ -10,7 +10,8 @@ stdout-path property
--------------------
Device trees may specify the device to be used for boot console output
with a stdout-path property under /chosen, as described in ePAPR, e.g.
with a stdout-path property under /chosen, as described in the Devicetree
Specification, e.g.
/ {
chosen {

2
Documentation/devicetree/bindings/common-properties.txt
View File

@ -1,6 +1,6 @@
Common properties
The ePAPR specification does not define any properties related to hardware
The Devicetree Specification does not define any properties related to hardware
byteswapping, but endianness issues show up frequently in porting Linux to
different machine types. This document attempts to provide a consistent
way of handling byteswapping across drivers.

4
Documentation/devicetree/bindings/crypto/fsl-sec4.txt
View File

@ -118,8 +118,8 @@ PROPERTIES
Definition: A list of clock name strings in the same order as the
clocks property.
Note: All other standard properties (see the ePAPR) are allowed
but are optional.
Note: All other standard properties (see the Devicetree Specification)
are allowed but are optional.
EXAMPLE

4
Documentation/devicetree/bindings/crypto/fsl-sec6.txt
View File

@ -55,8 +55,8 @@ PROPERTIES
triplet that includes the child address, parent address, &
length.
Note: All other standard properties (see the ePAPR) are allowed
but are optional.
Note: All other standard properties (see the Devicetree Specification)
are allowed but are optional.
EXAMPLE
crypto@a0000 {

16
Documentation/devicetree/bindings/display/panel/display-timing.txt
View File

@ -57,11 +57,11 @@ can be specified.
The parameters are defined as:
+----------+-------------------------------------+----------+-------+
| | ↑ | | |
| | ^ | | |
| | |vback_porch | | |
| | ↓ | | |
| | v | | |
+----------#######################################----------+-------+
| # ↑ # | |
| # ^ # | |
| # | # | |
| hback # | # hfront | hsync |
| porch # | hactive # porch | len |
@ -69,15 +69,15 @@ The parameters are defined as:
| # | # | |
| # |vactive # | |
| # | # | |
| # ↓ # | |
| # v # | |
+----------#######################################----------+-------+
| | ↑ | | |
| | ^ | | |
| | |vfront_porch | | |
| | ↓ | | |
| | v | | |
+----------+-------------------------------------+----------+-------+
| | ↑ | | |
| | ^ | | |
| | |vsync_len | | |
| | ↓ | | |
| | v | | |
+----------+-------------------------------------+----------+-------+
Example:

13
Documentation/devicetree/bindings/graph.txt
View File

@ -34,7 +34,7 @@ remote device, an 'endpoint' child node must be provided for each link.
If more than one port is present in a device node or there is more than one
endpoint at a port, or a port node needs to be associated with a selected
hardware interface, a common scheme using '#address-cells', '#size-cells'
and 'reg' properties is used number the nodes.
and 'reg' properties is used to number the nodes.
device {
...
@ -89,9 +89,9 @@ Links between endpoints
Each endpoint should contain a 'remote-endpoint' phandle property that points
to the corresponding endpoint in the port of the remote device. In turn, the
remote endpoint should contain a 'remote-endpoint' property. If it has one,
it must not point to another than the local endpoint. Two endpoints with their
'remote-endpoint' phandles pointing at each other form a link between the
remote endpoint should contain a 'remote-endpoint' property. If it has one, it
must not point to anything other than the local endpoint. Two endpoints with
their 'remote-endpoint' phandles pointing at each other form a link between the
containing ports.
device-1 {
@ -110,13 +110,12 @@ device-2 {
};
};
Required properties
-------------------
If there is more than one 'port' or more than one 'endpoint' node or 'reg'
property is present in port and/or endpoint nodes the following properties
are required in a relevant parent node:
property present in the port and/or endpoint nodes then the following
properties are required in a relevant parent node:
- #address-cells : number of cells required to define port/endpoint
identifier, should be 1.

2
Documentation/devicetree/bindings/iio/proximity/as3935.txt
View File

@ -3,6 +3,7 @@ Austrian Microsystems AS3935 Franklin lightning sensor device driver
Required properties:
- compatible: must be "ams,as3935"
- reg: SPI chip select number for the device
- spi-max-frequency: specifies maximum SPI clock frequency
- spi-cpha: SPI Mode 1. Refer to spi/spi-bus.txt for generic SPI
slave node bindings.
- interrupt-parent : should be the phandle for the interrupt controller
@ -21,6 +22,7 @@ Example:
as3935@0 {
compatible = "ams,as3935";
reg = <0>;
spi-max-frequency = <400000>;
spi-cpha;
interrupt-parent = <&gpio1>;
interrupts = <16 1>;

5
Documentation/devicetree/bindings/interrupt-controller/open-pic.txt
View File

@ -92,7 +92,6 @@ Example 2:
* References
[1] Power.org (TM) Standard for Embedded Power Architecture (TM) Platform
Requirements (ePAPR), Version 1.0, July 2008.
(http://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.0.pdf)
[1] Devicetree Specification
(https://www.devicetree.org/specifications/)

9
Documentation/devicetree/bindings/net/ethernet.txt
View File

@ -8,7 +8,8 @@ The following properties are common to the Ethernet controllers:
property;
- max-speed: number, specifies maximum speed in Mbit/s supported by the device;
- max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
the maximum frame size (there's contradiction in ePAPR).
the maximum frame size (there's contradiction in the Devicetree
Specification).
- phy-mode: string, operation mode of the PHY interface. This is now a de-facto
standard property; supported values are:
* "internal"
@ -35,9 +36,11 @@ The following properties are common to the Ethernet controllers:
* "rxaui"
* "xaui"
* "10gbase-kr" (10GBASE-KR, XFI, SFI)
- phy-connection-type: the same as "phy-mode" property but described in ePAPR;
- phy-connection-type: the same as "phy-mode" property but described in the
Devicetree Specification;
- phy-handle: phandle, specifies a reference to a node representing a PHY
device; this property is described in ePAPR and so preferred;
device; this property is described in the Devicetree Specification and so
preferred;
- phy: the same as "phy-handle" property, not recommended for new bindings.
- phy-device: the same as "phy-handle" property, not recommended for new
bindings.

0
Documentation/devicetree/bindings/powerpc/fsl/fman.txt → Documentation/devicetree/bindings/net/fsl-fman.txt
View File

2
Documentation/devicetree/bindings/net/wireless/brcm,bcm43xx-fmac.txt
View File

@ -31,7 +31,7 @@ mmc3: mmc@01c12000 {
non-removable;
status = "okay";
brcmf: bcrmf@1 {
brcmf: wifi@1 {
reg = <1>;
compatible = "brcm,bcm4329-fmac";
interrupt-parent = <&pio>;

6
Documentation/devicetree/bindings/powerpc/fsl/cpus.txt
View File

@ -3,10 +3,10 @@ Power Architecture CPU Binding
Copyright 2013 Freescale Semiconductor Inc.
Power Architecture CPUs in Freescale SOCs are represented in device trees as
per the definition in ePAPR.
per the definition in the Devicetree Specification.
In addition to the ePAPR definitions, the properties defined below may be
present on CPU nodes.
In addition to the the Devicetree Specification definitions, the properties
defined below may be present on CPU nodes.
PROPERTIES

2
Documentation/devicetree/bindings/powerpc/fsl/l2cache.txt
View File

@ -1,7 +1,7 @@
Freescale L2 Cache Controller
L2 cache is present in Freescale's QorIQ and QorIQ Qonverge platforms.
The cache bindings explained below are ePAPR compliant
The cache bindings explained below are Devicetree Specification compliant
Required Properties:

4
Documentation/devicetree/bindings/powerpc/fsl/srio-rmu.txt
View File

@ -124,8 +124,8 @@ Port-Write Unit:
A single IRQ that handles port-write conditions is
specified by this property. (Typically shared with error).
Note: All other standard properties (see the ePAPR) are allowed
but are optional.
Note: All other standard properties (see the Devicetree Specification)
are allowed but are optional.
Example:
rmu: rmu@d3000 {

3
Documentation/devicetree/bindings/powerpc/fsl/srio.txt
View File

@ -72,7 +72,8 @@ the following properties:
represents the LIODN associated with maintenance transactions
for the port.
Note: All other standard properties (see ePAPR) are allowed but are optional.
Note: All other standard properties (see the Devicetree Specification)
are allowed but are optional.
Example:

0
Documentation/devicetree/bindings/thermal/brcm,ns-thermal → Documentation/devicetree/bindings/thermal/brcm,ns-thermal.txt
View File

4
Documentation/devicetree/bindings/usb/exynos-usb.txt
View File

@ -92,6 +92,8 @@ Required properties:
parent's address space
- clocks: Clock IDs array as required by the controller.
- clock-names: names of clocks correseponding to IDs in the clock property
- vdd10-supply: 1.0V powr supply
- vdd33-supply: 3.0V/3.3V power supply
Sub-nodes:
The dwc3 core should be added as subnode to Exynos dwc3 glue.
@ -107,6 +109,8 @@ Example:
#address-cells = <1>;
#size-cells = <1>;
ranges;
vdd10-supply = <&ldo11_reg>;
vdd33-supply = <&ldo9_reg>;
dwc3 {
compatible = "synopsys,dwc3";

6
Documentation/devicetree/bindings/vendor-prefixes.txt
View File

@ -45,6 +45,7 @@ avia avia semiconductor
avic Shanghai AVIC Optoelectronics Co., Ltd.
axentia Axentia Technologies AB
axis Axis Communications AB
bananapi BIPAI KEJI LIMITED
boe BOE Technology Group Co., Ltd.
bosch Bosch Sensortec GmbH
boundary Boundary Devices Inc.
@ -159,6 +160,8 @@ iom Iomega Corporation
isee ISEE 2007 S.L.
isil Intersil
issi Integrated Silicon Solutions Inc.
itead ITEAD Intelligent Systems Co.Ltd
iwave iWave Systems Technologies Pvt. Ltd.
jdi Japan Display Inc.
jedec JEDEC Solid State Technology Association
karo Ka-Ro electronics GmbH
@ -177,6 +180,7 @@ lg LG Corporation
libretech Shenzhen Libre Technology Co., Ltd
licheepi Lichee Pi
linaro Linaro Limited
linksys Belkin International, Inc. (Linksys)
linux Linux-specific binding
lltc Linear Technology Corporation
lsi LSI Corp. (LSI Logic)
@ -269,8 +273,10 @@ renesas Renesas Electronics Corporation
richtek Richtek Technology Corporation
ricoh Ricoh Co. Ltd.
rikomagic Rikomagic Tech Corp. Ltd
riscv RISC-V Foundation
rockchip Fuzhou Rockchip Electronics Co., Ltd
rohm ROHM Semiconductor Co., Ltd
roofull Shenzhen Roofull Technology Co, Ltd
samsung Samsung Semiconductor
samtec Samtec/Softing company
sandisk Sandisk Corporation

2
Documentation/devicetree/booting-without-of.txt
View File

@ -1413,7 +1413,7 @@ Optional property:
from DMA operations originating from the bus. It provides a means of
defining a mapping or translation between the physical address space of
the bus and the physical address space of the parent of the bus.
(for more information see ePAPR specification)
(for more information see the Devicetree Specification)
* DMA Bus child
Optional property:

8
Documentation/devicetree/overlay-notes.txt
View File

@ -3,8 +3,7 @@ Device Tree Overlay Notes
This document describes the implementation of the in-kernel
device tree overlay functionality residing in drivers/of/overlay.c and is a
companion document to Documentation/devicetree/dt-object-internal.txt[1] &
Documentation/devicetree/dynamic-resolution-notes.txt[2]
companion document to Documentation/devicetree/dynamic-resolution-notes.txt[1]
How overlays work
-----------------
@ -16,8 +15,7 @@ Since the kernel mainly deals with devices, any new device node that result
in an active device should have it created while if the device node is either
disabled or removed all together, the affected device should be deregistered.
Lets take an example where we have a foo board with the following base tree
which is taken from [1].
Lets take an example where we have a foo board with the following base tree:
---- foo.dts -----------------------------------------------------------------
/* FOO platform */
@ -36,7 +34,7 @@ which is taken from [1].
};
---- foo.dts -----------------------------------------------------------------
The overlay bar.dts, when loaded (and resolved as described in [2]) should
The overlay bar.dts, when loaded (and resolved as described in [1]) should
---- bar.dts -----------------------------------------------------------------
/plugin/; /* allow undefined label references and record them */

2
Documentation/devicetree/usage-model.txt
View File

@ -387,7 +387,7 @@ static void __init harmony_init_machine(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
"simple-bus" is defined in the ePAPR 1.0 specification as a property
"simple-bus" is defined in the Devicetree Specification as a property
meaning a simple memory mapped bus, so the of_platform_populate() code
could be written to just assume simple-bus compatible nodes will
always be traversed. However, we pass it in as an argument so that

36
Documentation/printk-formats.txt
View File

@ -275,6 +275,42 @@ struct va_format:
Passed by reference.
kobjects:
%pO
Base specifier for kobject based structs. Must be followed with
character for specific type of kobject as listed below:
Device tree nodes:
%pOF[fnpPcCF]
For printing device tree nodes. The optional arguments are:
f device node full_name
n device node name
p device node phandle
P device node path spec (name + @unit)
F device node flags
c major compatible string
C full compatible string
Without any arguments prints full_name (same as %pOFf)
The separator when using multiple arguments is ':'
Examples:
%pOF /foo/bar@0 - Node full name
%pOFf /foo/bar@0 - Same as above
%pOFfp /foo/bar@0:10 - Node full name + phandle
%pOFfcF /foo/bar@0:foo,device:--P- - Node full name +
major compatible string +
node flags
D - dynamic
d - detached
P - Populated
B - Populated bus
Passed by reference.
struct clk:
%pC pll1

6
Documentation/xtensa/mmu.txt
View File

@ -41,9 +41,9 @@ The scheme below assumes that the kernel is loaded below 0x40000000.
00..1F -> 00 -> 00 -> 00
The default location of IO peripherals is above 0xf0000000. This may be changed
using a "ranges" property in a device tree simple-bus node. See ePAPR 1.1, §6.5
for details on the syntax and semantic of simple-bus nodes. The following
limitations apply:
using a "ranges" property in a device tree simple-bus node. See the Devicetree
Specification, section 4.5 for details on the syntax and semantics of
simple-bus nodes. The following limitations apply:
1. Only top level simple-bus nodes are considered

1
MAINTAINERS
View File

@ -9664,6 +9664,7 @@ S: Maintained
F: drivers/of/
F: include/linux/of*.h
F: scripts/dtc/
F: Documentation/ABI/testing/sysfs-firmware-ofw
OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
M: Rob Herring <robh+dt@kernel.org>

2
drivers/of/Makefile
View File

@ -1,4 +1,4 @@
obj-y = base.o device.o platform.o
obj-y = base.o device.o platform.o property.o
obj-$(CONFIG_OF_DYNAMIC) += dynamic.o
obj-$(CONFIG_OF_FLATTREE) += fdt.o
obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o

2
drivers/of/address.c
View File

@ -710,7 +710,7 @@ static int __of_address_to_resource(struct device_node *dev,
*
* Note that if your address is a PIO address, the conversion will fail if
* the physical address can't be internally converted to an IO token with
* pci_address_to_pio(), that is because it's either called to early or it
* pci_address_to_pio(), that is because it's either called too early or it
* can't be matched to any host bridge IO space
*/
int of_address_to_resource(struct device_node *dev, int index,

809
drivers/of/base.c
View File

@ -155,7 +155,7 @@ int __of_add_property_sysfs(struct device_node *np, struct property *pp)
sysfs_bin_attr_init(&pp->attr);
pp->attr.attr.name = safe_name(&np->kobj, pp->name);
pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO;
pp->attr.attr.mode = secure ? 0400 : 0444;
pp->attr.size = secure ? 0 : pp->length;
pp->attr.read = of_node_property_read;
@ -773,16 +773,31 @@ static struct device_node *__of_find_node_by_path(struct device_node *parent,
return NULL;
__for_each_child_of_node(parent, child) {
const char *name = strrchr(child->full_name, '/');
if (WARN(!name, "malformed device_node %s\n", child->full_name))
continue;
name++;
const char *name = kbasename(child->full_name);
if (strncmp(path, name, len) == 0 && (strlen(name) == len))
return child;
}
return NULL;
}
struct device_node *__of_find_node_by_full_path(struct device_node *node,
const char *path)
{
const char *separator = strchr(path, ':');
while (node && *path == '/') {
struct device_node *tmp = node;
path++; /* Increment past '/' delimiter */
node = __of_find_node_by_path(node, path);
of_node_put(tmp);
path = strchrnul(path, '/');
if (separator && separator < path)
break;
}
return node;
}
/**
* of_find_node_opts_by_path - Find a node matching a full OF path
* @path: Either the full path to match, or if the path does not
@ -842,16 +857,7 @@ struct device_node *of_find_node_opts_by_path(const char *path, const char **opt
raw_spin_lock_irqsave(&devtree_lock, flags);
if (!np)
np = of_node_get(of_root);
while (np && *path == '/') {
struct device_node *tmp = np;
path++; /* Increment past '/' delimiter */
np = __of_find_node_by_path(np, path);
of_node_put(tmp);
path = strchrnul(path, '/');
if (separator && separator < path)
break;
}
np = __of_find_node_by_full_path(np, path);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
@ -1113,458 +1119,6 @@ struct device_node *of_find_node_by_phandle(phandle handle)
}
EXPORT_SYMBOL(of_find_node_by_phandle);
/**
* of_property_count_elems_of_size - Count the number of elements in a property
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @elem_size: size of the individual element
*
* Search for a property in a device node and count the number of elements of
* size elem_size in it. Returns number of elements on sucess, -EINVAL if the
* property does not exist or its length does not match a multiple of elem_size
* and -ENODATA if the property does not have a value.
*/
int of_property_count_elems_of_size(const struct device_node *np,
const char *propname, int elem_size)
{
struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
if (prop->length % elem_size != 0) {
pr_err("size of %s in node %s is not a multiple of %d\n",
propname, np->full_name, elem_size);
return -EINVAL;
}
return prop->length / elem_size;
}
EXPORT_SYMBOL_GPL(of_property_count_elems_of_size);
/**
* of_find_property_value_of_size
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @min: minimum allowed length of property value
* @max: maximum allowed length of property value (0 means unlimited)
* @len: if !=NULL, actual length is written to here
*
* Search for a property in a device node and valid the requested size.
* Returns the property value on success, -EINVAL if the property does not
* exist, -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data is too small or too large.
*
*/
static void *of_find_property_value_of_size(const struct device_node *np,
const char *propname, u32 min, u32 max, size_t *len)
{
struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return ERR_PTR(-EINVAL);
if (!prop->value)
return ERR_PTR(-ENODATA);
if (prop->length < min)
return ERR_PTR(-EOVERFLOW);
if (max && prop->length > max)
return ERR_PTR(-EOVERFLOW);
if (len)
*len = prop->length;
return prop->value;
}
/**
* of_property_read_u32_index - Find and read a u32 from a multi-value property.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the u32 in the list of values
* @out_value: pointer to return value, modified only if no error.
*
* Search for a property in a device node and read nth 32-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u32 value can be decoded.
*/
int of_property_read_u32_index(const struct device_node *np,
const char *propname,
u32 index, u32 *out_value)
{
const u32 *val = of_find_property_value_of_size(np, propname,
((index + 1) * sizeof(*out_value)),
0,
NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = be32_to_cpup(((__be32 *)val) + index);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u32_index);
/**
* of_property_read_u64_index - Find and read a u64 from a multi-value property.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the u64 in the list of values
* @out_value: pointer to return value, modified only if no error.
*
* Search for a property in a device node and read nth 64-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u64 value can be decoded.
*/
int of_property_read_u64_index(const struct device_node *np,
const char *propname,
u32 index, u64 *out_value)
{
const u64 *val = of_find_property_value_of_size(np, propname,
((index + 1) * sizeof(*out_value)),
0, NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = be64_to_cpup(((__be64 *)val) + index);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u64_index);
/**
* of_property_read_variable_u8_array - Find and read an array of u8 from a
* property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 8-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 8 <0x50 0x60 0x70>;
*
* The out_values is modified only if a valid u8 value can be decoded.
*/
int of_property_read_variable_u8_array(const struct device_node *np,
const char *propname, u8 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const u8 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = *val++;
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array);
/**
* of_property_read_variable_u16_array - Find and read an array of u16 from a
* property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 16-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 16 <0x5000 0x6000 0x7000>;
*
* The out_values is modified only if a valid u16 value can be decoded.
*/
int of_property_read_variable_u16_array(const struct device_node *np,
const char *propname, u16 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be16 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = be16_to_cpup(val++);
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array);
/**
* of_property_read_variable_u32_array - Find and read an array of 32 bit
* integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 32-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u32 value can be decoded.
*/
int of_property_read_variable_u32_array(const struct device_node *np,
const char *propname, u32 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = be32_to_cpup(val++);
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array);
/**
* of_property_read_u64 - Find and read a 64 bit integer from a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_value: pointer to return value, modified only if return value is 0.
*
* Search for a property in a device node and read a 64-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u64 value can be decoded.
*/
int of_property_read_u64(const struct device_node *np, const char *propname,
u64 *out_value)
{
const __be32 *val = of_find_property_value_of_size(np, propname,
sizeof(*out_value),
0,
NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = of_read_number(val, 2);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u64);
/**
* of_property_read_variable_u64_array - Find and read an array of 64 bit
* integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 64-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u64 value can be decoded.
*/
int of_property_read_variable_u64_array(const struct device_node *np,
const char *propname, u64 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--) {
*out_values++ = of_read_number(val, 2);
val += 2;
}
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array);
/**
* of_property_read_string - Find and read a string from a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_string: pointer to null terminated return string, modified only if
* return value is 0.
*
* Search for a property in a device tree node and retrieve a null
* terminated string value (pointer to data, not a copy). Returns 0 on
* success, -EINVAL if the property does not exist, -ENODATA if property
* does not have a value, and -EILSEQ if the string is not null-terminated
* within the length of the property data.
*
* The out_string pointer is modified only if a valid string can be decoded.
*/
int of_property_read_string(const struct device_node *np, const char *propname,
const char **out_string)
{
const struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
if (strnlen(prop->value, prop->length) >= prop->length)
return -EILSEQ;
*out_string = prop->value;
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_string);
/**
* of_property_match_string() - Find string in a list and return index
* @np: pointer to node containing string list property
* @propname: string list property name
* @string: pointer to string to search for in string list
*
* This function searches a string list property and returns the index
* of a specific string value.
*/
int of_property_match_string(const struct device_node *np, const char *propname,
const char *string)
{
const struct property *prop = of_find_property(np, propname, NULL);
size_t l;
int i;
const char *p, *end;
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
p = prop->value;
end = p + prop->length;
for (i = 0; p < end; i++, p += l) {
l = strnlen(p, end - p) + 1;
if (p + l > end)
return -EILSEQ;
pr_debug("comparing %s with %s\n", string, p);
if (strcmp(string, p) == 0)
return i; /* Found it; return index */
}
return -ENODATA;
}
EXPORT_SYMBOL_GPL(of_property_match_string);
/**
* of_property_read_string_helper() - Utility helper for parsing string properties
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_strs: output array of string pointers.
* @sz: number of array elements to read.
* @skip: Number of strings to skip over at beginning of list.
*
* Don't call this function directly. It is a utility helper for the
* of_property_read_string*() family of functions.
*/
int of_property_read_string_helper(const struct device_node *np,
const char *propname, const char **out_strs,
size_t sz, int skip)
{
const struct property *prop = of_find_property(np, propname, NULL);
int l = 0, i = 0;
const char *p, *end;
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
p = prop->value;
end = p + prop->length;
for (i = 0; p < end && (!out_strs || i < skip + sz); i++, p += l) {
l = strnlen(p, end - p) + 1;
if (p + l > end)
return -EILSEQ;
if (out_strs && i >= skip)
*out_strs++ = p;
}
i -= skip;
return i <= 0 ? -ENODATA : i;
}
EXPORT_SYMBOL_GPL(of_property_read_string_helper);
void of_print_phandle_args(const char *msg, const struct of_phandle_args *args)
{
int i;
@ -2213,47 +1767,6 @@ int of_alias_get_highest_id(const char *stem)
}
EXPORT_SYMBOL_GPL(of_alias_get_highest_id);
const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
u32 *pu)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur) {
curv = prop->value;
goto out_val;
}
curv += sizeof(*cur);
if (curv >= prop->value + prop->length)
return NULL;
out_val:
*pu = be32_to_cpup(curv);
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_u32);
const char *of_prop_next_string(struct property *prop, const char *cur)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur)
return prop->value;
curv += strlen(cur) + 1;
if (curv >= prop->value + prop->length)
return NULL;
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_string);
/**
* of_console_check() - Test and setup console for DT setup
* @dn - Pointer to device node
@ -2327,283 +1840,3 @@ int of_find_last_cache_level(unsigned int cpu)
return cache_level;
}
/**
* of_graph_parse_endpoint() - parse common endpoint node properties
* @node: pointer to endpoint device_node
* @endpoint: pointer to the OF endpoint data structure
*
* The caller should hold a reference to @node.
*/
int of_graph_parse_endpoint(const struct device_node *node,
struct of_endpoint *endpoint)
{
struct device_node *port_node = of_get_parent(node);
WARN_ONCE(!port_node, "%s(): endpoint %s has no parent node\n",
__func__, node->full_name);
memset(endpoint, 0, sizeof(*endpoint));
endpoint->local_node = node;
/*
* It doesn't matter whether the two calls below succeed.
* If they don't then the default value 0 is used.
*/
of_property_read_u32(port_node, "reg", &endpoint->port);
of_property_read_u32(node, "reg", &endpoint->id);
of_node_put(port_node);
return 0;
}
EXPORT_SYMBOL(of_graph_parse_endpoint);
/**
* of_graph_get_port_by_id() - get the port matching a given id
* @parent: pointer to the parent device node
* @id: id of the port
*
* Return: A 'port' node pointer with refcount incremented. The caller
* has to use of_node_put() on it when done.
*/
struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
{
struct device_node *node, *port;
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
for_each_child_of_node(parent, port) {
u32 port_id = 0;
if (of_node_cmp(port->name, "port") != 0)
continue;
of_property_read_u32(port, "reg", &port_id);
if (id == port_id)
break;
}
of_node_put(node);
return port;
}
EXPORT_SYMBOL(of_graph_get_port_by_id);
/**
* of_graph_get_next_endpoint() - get next endpoint node
* @parent: pointer to the parent device node
* @prev: previous endpoint node, or NULL to get first
*
* Return: An 'endpoint' node pointer with refcount incremented. Refcount
* of the passed @prev node is decremented.
*/
struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
struct device_node *prev)
{
struct device_node *endpoint;
struct device_node *port;
if (!parent)
return NULL;
/*
* Start by locating the port node. If no previous endpoint is specified
* search for the first port node, otherwise get the previous endpoint
* parent port node.
*/
if (!prev) {
struct device_node *node;
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
port = of_get_child_by_name(parent, "port");
of_node_put(node);
if (!port) {
pr_err("graph: no port node found in %s\n",
parent->full_name);
return NULL;
}
} else {
port = of_get_parent(prev);
if (WARN_ONCE(!port, "%s(): endpoint %s has no parent node\n",
__func__, prev->full_name))
return NULL;
}
while (1) {
/*
* Now that we have a port node, get the next endpoint by
* getting the next child. If the previous endpoint is NULL this
* will return the first child.
*/
endpoint = of_get_next_child(port, prev);
if (endpoint) {
of_node_put(port);
return endpoint;
}
/* No more endpoints under this port, try the next one. */
prev = NULL;
do {
port = of_get_next_child(parent, port);
if (!port)
return NULL;
} while (of_node_cmp(port->name, "port"));
}
}
EXPORT_SYMBOL(of_graph_get_next_endpoint);
/**
* of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers
* @parent: pointer to the parent device node
* @port_reg: identifier (value of reg property) of the parent port node
* @reg: identifier (value of reg property) of the endpoint node
*
* Return: An 'endpoint' node pointer which is identified by reg and at the same
* is the child of a port node identified by port_reg. reg and port_reg are
* ignored when they are -1.
*/
struct device_node *of_graph_get_endpoint_by_regs(
const struct device_node *parent, int port_reg, int reg)
{
struct of_endpoint endpoint;
struct device_node *node = NULL;
for_each_endpoint_of_node(parent, node) {
of_graph_parse_endpoint(node, &endpoint);
if (((port_reg == -1) || (endpoint.port == port_reg)) &&
((reg == -1) || (endpoint.id == reg)))
return node;
}
return NULL;
}
EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
/**
* of_graph_get_remote_endpoint() - get remote endpoint node
* @node: pointer to a local endpoint device_node
*
* Return: Remote endpoint node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
{
/* Get remote endpoint node. */
return of_parse_phandle(node, "remote-endpoint", 0);
}
EXPORT_SYMBOL(of_graph_get_remote_endpoint);
/**
* of_graph_get_port_parent() - get port's parent node
* @node: pointer to a local endpoint device_node
*
* Return: device node associated with endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_port_parent(struct device_node *node)
{
unsigned int depth;
/* Walk 3 levels up only if there is 'ports' node. */
for (depth = 3; depth && node; depth--) {
node = of_get_next_parent(node);
if (depth == 2 && of_node_cmp(node->name, "ports"))
break;
}
return node;
}
EXPORT_SYMBOL(of_graph_get_port_parent);
/**
* of_graph_get_remote_port_parent() - get remote port's parent node
* @node: pointer to a local endpoint device_node
*
* Return: Remote device node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{
struct device_node *np;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
return of_graph_get_port_parent(np);
}
EXPORT_SYMBOL(of_graph_get_remote_port_parent);
/**
* of_graph_get_remote_port() - get remote port node
* @node: pointer to a local endpoint device_node
*
* Return: Remote port node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_port(const struct device_node *node)
{
struct device_node *np;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
if (!np)
return NULL;
return of_get_next_parent(np);
}
EXPORT_SYMBOL(of_graph_get_remote_port);
int of_graph_get_endpoint_count(const struct device_node *np)
{
struct device_node *endpoint;
int num = 0;
for_each_endpoint_of_node(np, endpoint)
num++;
return num;
}
EXPORT_SYMBOL(of_graph_get_endpoint_count);
/**
* of_graph_get_remote_node() - get remote parent device_node for given port/endpoint
* @node: pointer to parent device_node containing graph port/endpoint
* @port: identifier (value of reg property) of the parent port node
* @endpoint: identifier (value of reg property) of the endpoint node
*
* Return: Remote device node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_node(const struct device_node *node,
u32 port, u32 endpoint)
{
struct device_node *endpoint_node, *remote;
endpoint_node = of_graph_get_endpoint_by_regs(node, port, endpoint);
if (!endpoint_node) {
pr_debug("no valid endpoint (%d, %d) for node %s\n",
port, endpoint, node->full_name);
return NULL;
}
remote = of_graph_get_remote_port_parent(endpoint_node);
of_node_put(endpoint_node);
if (!remote) {
pr_debug("no valid remote node\n");
return NULL;
}
if (!of_device_is_available(remote)) {
pr_debug("not available for remote node\n");
return NULL;
}
return remote;
}
EXPORT_SYMBOL(of_graph_get_remote_node);

2
drivers/of/dynamic.c
View File

@ -216,7 +216,7 @@ int of_property_notify(int action, struct device_node *np,
return of_reconfig_notify(action, &pr);
}
void __of_attach_node(struct device_node *np)
static void __of_attach_node(struct device_node *np)
{
const __be32 *phandle;
int sz;

4
drivers/of/fdt.c
View File

@ -91,7 +91,7 @@ void of_fdt_limit_memory(int limit)
* On match, returns a non-zero value with smaller values returned for more
* specific compatible values.
*/
int of_fdt_is_compatible(const void *blob,
static int of_fdt_is_compatible(const void *blob,
unsigned long node, const char *compat)
{
const char *cp;
@ -1053,7 +1053,7 @@ u64 __init dt_mem_next_cell(int s, const __be32 **cellp)
}
/**
* early_init_dt_scan_memory - Look for an parse memory nodes
* early_init_dt_scan_memory - Look for and parse memory nodes
*/
int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data)

5
drivers/of/irq.c
View File

@ -369,7 +369,10 @@ EXPORT_SYMBOL_GPL(of_irq_parse_one);
*/
int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
{
int irq = irq_of_parse_and_map(dev, index);
int irq = of_irq_get(dev, index);
if (irq < 0)
return irq;
/* Only dereference the resource if both the
* resource and the irq are valid. */

4
drivers/of/of_private.h
View File

@ -77,6 +77,9 @@ extern void *__unflatten_device_tree(const void *blob,
struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
__printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...);
struct device_node *__of_find_node_by_full_path(struct device_node *node,
const char *path);
extern const void *__of_get_property(const struct device_node *np,
const char *name, int *lenp);
extern int __of_add_property(struct device_node *np, struct property *prop);
@ -90,7 +93,6 @@ extern int __of_update_property(struct device_node *np,
extern void __of_update_property_sysfs(struct device_node *np,
struct property *newprop, struct property *oldprop);
extern void __of_attach_node(struct device_node *np);
extern int __of_attach_node_sysfs(struct device_node *np);
extern void __of_detach_node(struct device_node *np);
extern void __of_detach_node_sysfs(struct device_node *np);

4
drivers/of/overlay.c
View File

@ -132,6 +132,10 @@ static int of_overlay_apply_single_device_node(struct of_overlay *ov,
/* NOTE: Multiple mods of created nodes not supported */
tchild = of_get_child_by_name(target, cname);
if (tchild != NULL) {
/* new overlay phandle value conflicts with existing value */
if (child->phandle)
return -EINVAL;
/* apply overlay recursively */
ret = of_overlay_apply_one(ov, tchild, child);
of_node_put(tchild);

2
drivers/of/platform.c
View File

@ -99,7 +99,7 @@ static void of_device_make_bus_id(struct device *dev)
/* format arguments only used if dev_name() resolves to NULL */
dev_set_name(dev, dev_name(dev) ? "%s:%s" : "%s",
strrchr(node->full_name, '/') + 1, dev_name(dev));
kbasename(node->full_name), dev_name(dev));
node = node->parent;
}
}

806
drivers/of/property.c Normal file
View File

@ -0,0 +1,806 @@
/*
* drivers/of/property.c - Procedures for accessing and interpreting
* Devicetree properties and graphs.
*
* Initially created by copying procedures from drivers/of/base.c. This
* file contains the OF property as well as the OF graph interface
* functions.
*
* Paul Mackerras August 1996.
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
* {engebret|bergner}@us.ibm.com
*
* Adapted for sparc and sparc64 by David S. Miller davem@davemloft.net
*
* Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and
* Grant Likely.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#define pr_fmt(fmt) "OF: " fmt
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/string.h>
#include "of_private.h"
/**
* of_property_count_elems_of_size - Count the number of elements in a property
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @elem_size: size of the individual element
*
* Search for a property in a device node and count the number of elements of
* size elem_size in it. Returns number of elements on sucess, -EINVAL if the
* property does not exist or its length does not match a multiple of elem_size
* and -ENODATA if the property does not have a value.
*/
int of_property_count_elems_of_size(const struct device_node *np,
const char *propname, int elem_size)
{
struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
if (prop->length % elem_size != 0) {
pr_err("size of %s in node %s is not a multiple of %d\n",
propname, np->full_name, elem_size);
return -EINVAL;
}
return prop->length / elem_size;
}
EXPORT_SYMBOL_GPL(of_property_count_elems_of_size);
/**
* of_find_property_value_of_size
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @min: minimum allowed length of property value
* @max: maximum allowed length of property value (0 means unlimited)
* @len: if !=NULL, actual length is written to here
*
* Search for a property in a device node and valid the requested size.
* Returns the property value on success, -EINVAL if the property does not
* exist, -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data is too small or too large.
*
*/
static void *of_find_property_value_of_size(const struct device_node *np,
const char *propname, u32 min, u32 max, size_t *len)
{
struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return ERR_PTR(-EINVAL);
if (!prop->value)
return ERR_PTR(-ENODATA);
if (prop->length < min)
return ERR_PTR(-EOVERFLOW);
if (max && prop->length > max)
return ERR_PTR(-EOVERFLOW);
if (len)
*len = prop->length;
return prop->value;
}
/**
* of_property_read_u32_index - Find and read a u32 from a multi-value property.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the u32 in the list of values
* @out_value: pointer to return value, modified only if no error.
*
* Search for a property in a device node and read nth 32-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u32 value can be decoded.
*/
int of_property_read_u32_index(const struct device_node *np,
const char *propname,
u32 index, u32 *out_value)
{
const u32 *val = of_find_property_value_of_size(np, propname,
((index + 1) * sizeof(*out_value)),
0,
NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = be32_to_cpup(((__be32 *)val) + index);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u32_index);
/**
* of_property_read_u64_index - Find and read a u64 from a multi-value property.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the u64 in the list of values
* @out_value: pointer to return value, modified only if no error.
*
* Search for a property in a device node and read nth 64-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u64 value can be decoded.
*/
int of_property_read_u64_index(const struct device_node *np,
const char *propname,
u32 index, u64 *out_value)
{
const u64 *val = of_find_property_value_of_size(np, propname,
((index + 1) * sizeof(*out_value)),
0, NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = be64_to_cpup(((__be64 *)val) + index);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u64_index);
/**
* of_property_read_variable_u8_array - Find and read an array of u8 from a
* property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 8-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 8 <0x50 0x60 0x70>;
*
* The out_values is modified only if a valid u8 value can be decoded.
*/
int of_property_read_variable_u8_array(const struct device_node *np,
const char *propname, u8 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const u8 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = *val++;
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u8_array);
/**
* of_property_read_variable_u16_array - Find and read an array of u16 from a
* property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 16-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* dts entry of array should be like:
* property = /bits/ 16 <0x5000 0x6000 0x7000>;
*
* The out_values is modified only if a valid u16 value can be decoded.
*/
int of_property_read_variable_u16_array(const struct device_node *np,
const char *propname, u16 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be16 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = be16_to_cpup(val++);
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u16_array);
/**
* of_property_read_variable_u32_array - Find and read an array of 32 bit
* integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 32-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u32 value can be decoded.
*/
int of_property_read_variable_u32_array(const struct device_node *np,
const char *propname, u32 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--)
*out_values++ = be32_to_cpup(val++);
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u32_array);
/**
* of_property_read_u64 - Find and read a 64 bit integer from a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_value: pointer to return value, modified only if return value is 0.
*
* Search for a property in a device node and read a 64-bit value from
* it. Returns 0 on success, -EINVAL if the property does not exist,
* -ENODATA if property does not have a value, and -EOVERFLOW if the
* property data isn't large enough.
*
* The out_value is modified only if a valid u64 value can be decoded.
*/
int of_property_read_u64(const struct device_node *np, const char *propname,
u64 *out_value)
{
const __be32 *val = of_find_property_value_of_size(np, propname,
sizeof(*out_value),
0,
NULL);
if (IS_ERR(val))
return PTR_ERR(val);
*out_value = of_read_number(val, 2);
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_u64);
/**
* of_property_read_variable_u64_array - Find and read an array of 64 bit
* integers from a property, with bounds on the minimum and maximum array size.
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_values: pointer to return value, modified only if return value is 0.
* @sz_min: minimum number of array elements to read
* @sz_max: maximum number of array elements to read, if zero there is no
* upper limit on the number of elements in the dts entry but only
* sz_min will be read.
*
* Search for a property in a device node and read 64-bit value(s) from
* it. Returns number of elements read on success, -EINVAL if the property
* does not exist, -ENODATA if property does not have a value, and -EOVERFLOW
* if the property data is smaller than sz_min or longer than sz_max.
*
* The out_values is modified only if a valid u64 value can be decoded.
*/
int of_property_read_variable_u64_array(const struct device_node *np,
const char *propname, u64 *out_values,
size_t sz_min, size_t sz_max)
{
size_t sz, count;
const __be32 *val = of_find_property_value_of_size(np, propname,
(sz_min * sizeof(*out_values)),
(sz_max * sizeof(*out_values)),
&sz);
if (IS_ERR(val))
return PTR_ERR(val);
if (!sz_max)
sz = sz_min;
else
sz /= sizeof(*out_values);
count = sz;
while (count--) {
*out_values++ = of_read_number(val, 2);
val += 2;
}
return sz;
}
EXPORT_SYMBOL_GPL(of_property_read_variable_u64_array);
/**
* of_property_read_string - Find and read a string from a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_string: pointer to null terminated return string, modified only if
* return value is 0.
*
* Search for a property in a device tree node and retrieve a null
* terminated string value (pointer to data, not a copy). Returns 0 on
* success, -EINVAL if the property does not exist, -ENODATA if property
* does not have a value, and -EILSEQ if the string is not null-terminated
* within the length of the property data.
*
* The out_string pointer is modified only if a valid string can be decoded.
*/
int of_property_read_string(const struct device_node *np, const char *propname,
const char **out_string)
{
const struct property *prop = of_find_property(np, propname, NULL);
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
if (strnlen(prop->value, prop->length) >= prop->length)
return -EILSEQ;
*out_string = prop->value;
return 0;
}
EXPORT_SYMBOL_GPL(of_property_read_string);
/**
* of_property_match_string() - Find string in a list and return index
* @np: pointer to node containing string list property
* @propname: string list property name
* @string: pointer to string to search for in string list
*
* This function searches a string list property and returns the index
* of a specific string value.
*/
int of_property_match_string(const struct device_node *np, const char *propname,
const char *string)
{
const struct property *prop = of_find_property(np, propname, NULL);
size_t l;
int i;
const char *p, *end;
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
p = prop->value;
end = p + prop->length;
for (i = 0; p < end; i++, p += l) {
l = strnlen(p, end - p) + 1;
if (p + l > end)
return -EILSEQ;
pr_debug("comparing %s with %s\n", string, p);
if (strcmp(string, p) == 0)
return i; /* Found it; return index */
}
return -ENODATA;
}
EXPORT_SYMBOL_GPL(of_property_match_string);
/**
* of_property_read_string_helper() - Utility helper for parsing string properties
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_strs: output array of string pointers.
* @sz: number of array elements to read.
* @skip: Number of strings to skip over at beginning of list.
*
* Don't call this function directly. It is a utility helper for the
* of_property_read_string*() family of functions.
*/
int of_property_read_string_helper(const struct device_node *np,
const char *propname, const char **out_strs,
size_t sz, int skip)
{
const struct property *prop = of_find_property(np, propname, NULL);
int l = 0, i = 0;
const char *p, *end;
if (!prop)
return -EINVAL;
if (!prop->value)
return -ENODATA;
p = prop->value;
end = p + prop->length;
for (i = 0; p < end && (!out_strs || i < skip + sz); i++, p += l) {
l = strnlen(p, end - p) + 1;
if (p + l > end)
return -EILSEQ;
if (out_strs && i >= skip)
*out_strs++ = p;
}
i -= skip;
return i <= 0 ? -ENODATA : i;
}
EXPORT_SYMBOL_GPL(of_property_read_string_helper);
const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
u32 *pu)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur) {
curv = prop->value;
goto out_val;
}
curv += sizeof(*cur);
if (curv >= prop->value + prop->length)
return NULL;
out_val:
*pu = be32_to_cpup(curv);
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_u32);
const char *of_prop_next_string(struct property *prop, const char *cur)
{
const void *curv = cur;
if (!prop)
return NULL;
if (!cur)
return prop->value;
curv += strlen(cur) + 1;
if (curv >= prop->value + prop->length)
return NULL;
return curv;
}
EXPORT_SYMBOL_GPL(of_prop_next_string);
/**
* of_graph_parse_endpoint() - parse common endpoint node properties
* @node: pointer to endpoint device_node
* @endpoint: pointer to the OF endpoint data structure
*
* The caller should hold a reference to @node.
*/
int of_graph_parse_endpoint(const struct device_node *node,
struct of_endpoint *endpoint)
{
struct device_node *port_node = of_get_parent(node);
WARN_ONCE(!port_node, "%s(): endpoint %s has no parent node\n",
__func__, node->full_name);
memset(endpoint, 0, sizeof(*endpoint));
endpoint->local_node = node;
/*
* It doesn't matter whether the two calls below succeed.
* If they don't then the default value 0 is used.
*/
of_property_read_u32(port_node, "reg", &endpoint->port);
of_property_read_u32(node, "reg", &endpoint->id);
of_node_put(port_node);
return 0;
}
EXPORT_SYMBOL(of_graph_parse_endpoint);
/**
* of_graph_get_port_by_id() - get the port matching a given id
* @parent: pointer to the parent device node
* @id: id of the port
*
* Return: A 'port' node pointer with refcount incremented. The caller
* has to use of_node_put() on it when done.
*/
struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
{
struct device_node *node, *port;
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
for_each_child_of_node(parent, port) {
u32 port_id = 0;
if (of_node_cmp(port->name, "port") != 0)
continue;
of_property_read_u32(port, "reg", &port_id);
if (id == port_id)
break;
}
of_node_put(node);
return port;
}
EXPORT_SYMBOL(of_graph_get_port_by_id);
/**
* of_graph_get_next_endpoint() - get next endpoint node
* @parent: pointer to the parent device node
* @prev: previous endpoint node, or NULL to get first
*
* Return: An 'endpoint' node pointer with refcount incremented. Refcount
* of the passed @prev node is decremented.
*/
struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
struct device_node *prev)
{
struct device_node *endpoint;
struct device_node *port;
if (!parent)
return NULL;
/*
* Start by locating the port node. If no previous endpoint is specified
* search for the first port node, otherwise get the previous endpoint
* parent port node.
*/
if (!prev) {
struct device_node *node;
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
port = of_get_child_by_name(parent, "port");
of_node_put(node);
if (!port) {
pr_err("graph: no port node found in %s\n",
parent->full_name);
return NULL;
}
} else {
port = of_get_parent(prev);
if (WARN_ONCE(!port, "%s(): endpoint %s has no parent node\n",
__func__, prev->full_name))
return NULL;
}
while (1) {
/*
* Now that we have a port node, get the next endpoint by
* getting the next child. If the previous endpoint is NULL this
* will return the first child.
*/
endpoint = of_get_next_child(port, prev);
if (endpoint) {
of_node_put(port);
return endpoint;
}
/* No more endpoints under this port, try the next one. */
prev = NULL;
do {
port = of_get_next_child(parent, port);
if (!port)
return NULL;
} while (of_node_cmp(port->name, "port"));
}
}
EXPORT_SYMBOL(of_graph_get_next_endpoint);
/**
* of_graph_get_endpoint_by_regs() - get endpoint node of specific identifiers
* @parent: pointer to the parent device node
* @port_reg: identifier (value of reg property) of the parent port node
* @reg: identifier (value of reg property) of the endpoint node
*
* Return: An 'endpoint' node pointer which is identified by reg and at the same
* is the child of a port node identified by port_reg. reg and port_reg are
* ignored when they are -1.
*/
struct device_node *of_graph_get_endpoint_by_regs(
const struct device_node *parent, int port_reg, int reg)
{
struct of_endpoint endpoint;
struct device_node *node = NULL;
for_each_endpoint_of_node(parent, node) {
of_graph_parse_endpoint(node, &endpoint);
if (((port_reg == -1) || (endpoint.port == port_reg)) &&
((reg == -1) || (endpoint.id == reg)))
return node;
}
return NULL;
}
EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
/**
* of_graph_get_remote_endpoint() - get remote endpoint node
* @node: pointer to a local endpoint device_node
*
* Return: Remote endpoint node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
{
/* Get remote endpoint node. */
return of_parse_phandle(node, "remote-endpoint", 0);
}
EXPORT_SYMBOL(of_graph_get_remote_endpoint);
/**
* of_graph_get_port_parent() - get port's parent node
* @node: pointer to a local endpoint device_node
*
* Return: device node associated with endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_port_parent(struct device_node *node)
{
unsigned int depth;
/* Walk 3 levels up only if there is 'ports' node. */
for (depth = 3; depth && node; depth--) {
node = of_get_next_parent(node);
if (depth == 2 && of_node_cmp(node->name, "ports"))
break;
}
return node;
}
EXPORT_SYMBOL(of_graph_get_port_parent);
/**
* of_graph_get_remote_port_parent() - get remote port's parent node
* @node: pointer to a local endpoint device_node
*
* Return: Remote device node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{
struct device_node *np;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
return of_graph_get_port_parent(np);
}
EXPORT_SYMBOL(of_graph_get_remote_port_parent);
/**
* of_graph_get_remote_port() - get remote port node
* @node: pointer to a local endpoint device_node
*
* Return: Remote port node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_port(const struct device_node *node)
{
struct device_node *np;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
if (!np)
return NULL;
return of_get_next_parent(np);
}
EXPORT_SYMBOL(of_graph_get_remote_port);
int of_graph_get_endpoint_count(const struct device_node *np)
{
struct device_node *endpoint;
int num = 0;
for_each_endpoint_of_node(np, endpoint)
num++;
return num;
}
EXPORT_SYMBOL(of_graph_get_endpoint_count);
/**
* of_graph_get_remote_node() - get remote parent device_node for given port/endpoint
* @node: pointer to parent device_node containing graph port/endpoint
* @port: identifier (value of reg property) of the parent port node
* @endpoint: identifier (value of reg property) of the endpoint node
*
* Return: Remote device node associated with remote endpoint node linked
* to @node. Use of_node_put() on it when done.
*/
struct device_node *of_graph_get_remote_node(const struct device_node *node,
u32 port, u32 endpoint)
{
struct device_node *endpoint_node, *remote;
endpoint_node = of_graph_get_endpoint_by_regs(node, port, endpoint);
if (!endpoint_node) {
pr_debug("no valid endpoint (%d, %d) for node %s\n",
port, endpoint, node->full_name);
return NULL;
}
remote = of_graph_get_remote_port_parent(endpoint_node);
of_node_put(endpoint_node);
if (!remote) {
pr_debug("no valid remote node\n");
return NULL;
}
if (!of_device_is_available(remote)) {
pr_debug("not available for remote node\n");
return NULL;
}
return remote;
}
EXPORT_SYMBOL(of_graph_get_remote_node);

34
drivers/of/resolver.c
View File

@ -20,35 +20,11 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include "of_private.h"
/* illegal phandle value (set when unresolved) */
#define OF_PHANDLE_ILLEGAL 0xdeadbeef
/**
* Find a node with the give full name by recursively following any of
* the child node links.
*/
static struct device_node *find_node_by_full_name(struct device_node *node,
const char *full_name)
{
struct device_node *child, *found;
if (!node)
return NULL;
if (!of_node_cmp(node->full_name, full_name))
return of_node_get(node);
for_each_child_of_node(node, child) {
found = find_node_by_full_name(child, full_name);
if (found != NULL) {
of_node_put(child);
return found;
}
}
return NULL;
}
static phandle live_tree_max_phandle(void)
{
struct device_node *node;
@ -138,7 +114,7 @@ static int update_usages_of_a_phandle_reference(struct device_node *overlay,
if (err)
goto err_fail;
refnode = find_node_by_full_name(overlay, node_path);
refnode = __of_find_node_by_full_path(of_node_get(overlay), node_path);
if (!refnode)
continue;
@ -165,8 +141,8 @@ err_fail:
static int node_name_cmp(const struct device_node *dn1,
const struct device_node *dn2)
{
const char *n1 = strrchr(dn1->full_name, '/') ? : "/";
const char *n2 = strrchr(dn2->full_name, '/') ? : "/";
const char *n1 = kbasename(dn1->full_name);
const char *n2 = kbasename(dn2->full_name);
return of_node_cmp(n1, n2);
}

4
drivers/of/unittest-data/tests-platform.dtsi
View File

@ -26,7 +26,9 @@
#size-cells = <0>;
dev@100 {
compatible = "test-sub-device";
compatible = "test-sub-device",
"test-compat2",
"test-compat3";
reg = <0x100>;
};
};

58
drivers/of/unittest.c
View File

@ -239,6 +239,63 @@ static void __init of_unittest_check_tree_linkage(void)
pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}
static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
const char *expected)
{
unsigned char buf[strlen(expected)+10];
int size, i;
/* Baseline; check conversion with a large size limit */
memset(buf, 0xff, sizeof(buf));
size = snprintf(buf, sizeof(buf) - 2, fmt, np);
/* use strcmp() instead of strncmp() here to be absolutely sure strings match */
unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
"sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
fmt, expected, buf);
/* Make sure length limits work */
size++;
for (i = 0; i < 2; i++, size--) {
/* Clear the buffer, and make sure it works correctly still */
memset(buf, 0xff, sizeof(buf));
snprintf(buf, size+1, fmt, np);
unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
"snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
size, fmt, expected, buf);
}
}
static void __init of_unittest_printf(void)
{
struct device_node *np;
const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
char phandle_str[16] = "";
np = of_find_node_by_path(full_name);
if (!np) {
unittest(np, "testcase data missing\n");
return;
}
num_to_str(phandle_str, sizeof(phandle_str), np->phandle);
of_unittest_printf_one(np, "%pOF", full_name);
of_unittest_printf_one(np, "%pOFf", full_name);
of_unittest_printf_one(np, "%pOFp", phandle_str);
of_unittest_printf_one(np, "%pOFP", "dev@100");
of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
of_unittest_printf_one(np, "%10pOFP", " dev@100");
of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
of_unittest_printf_one(of_root, "%pOFP", "/");
of_unittest_printf_one(np, "%pOFF", "----");
of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
of_unittest_printf_one(np, "%pOFc", "test-sub-device");
of_unittest_printf_one(np, "%pOFC",
"\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
}
struct node_hash {
struct hlist_node node;
struct device_node *np;
@ -2269,6 +2326,7 @@ static int __init of_unittest(void)
of_unittest_find_node_by_name();
of_unittest_dynamic();
of_unittest_parse_phandle_with_args();
of_unittest_printf();
of_unittest_property_string();
of_unittest_property_copy();
of_unittest_changeset();

34
include/linux/of.h
View File

@ -148,18 +148,28 @@ extern raw_spinlock_t devtree_lock;
#ifdef CONFIG_OF
void of_core_init(void);
static inline bool is_of_node(struct fwnode_handle *fwnode)
static inline bool is_of_node(const struct fwnode_handle *fwnode)
{
return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_OF;
}
static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
{
return is_of_node(fwnode) ?
container_of(fwnode, struct device_node, fwnode) : NULL;
}
#define to_of_node(__fwnode) \
({ \
typeof(__fwnode) __to_of_node_fwnode = (__fwnode); \
\
is_of_node(__to_of_node_fwnode) ? \
container_of(__to_of_node_fwnode, \
struct device_node, fwnode) : \
NULL; \
})
#define of_fwnode_handle(node) (&(node)->fwnode)
#define of_fwnode_handle(node) \
({ \
typeof(node) __of_fwnode_handle_node = (node); \
\
__of_fwnode_handle_node ? \
&__of_fwnode_handle_node->fwnode : NULL; \
})
static inline bool of_have_populated_dt(void)
{
@ -533,12 +543,12 @@ static inline void of_core_init(void)
{
}
static inline bool is_of_node(struct fwnode_handle *fwnode)
static inline bool is_of_node(const struct fwnode_handle *fwnode)
{
return false;
}
static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode)
{
return NULL;
}
@ -627,6 +637,12 @@ static inline int of_device_is_compatible(const struct device_node *device,
return 0;
}
static inline int of_device_compatible_match(struct device_node *device,
const char *const *compat)
{
return 0;
}
static inline bool of_device_is_available(const struct device_node *device)
{
return false;

3
include/linux/of_fdt.h
View File

@ -31,9 +31,6 @@ extern void *of_fdt_get_property(const void *blob,
unsigned long node,
const char *name,
int *size);
extern int of_fdt_is_compatible(const void *blob,
unsigned long node,
const char *compat);
extern bool of_fdt_is_big_endian(const void *blob,
unsigned long node);
extern int of_fdt_match(const void *blob, unsigned long node,

136
lib/vsprintf.c
View File

@ -31,6 +31,7 @@
#include <linux/dcache.h>
#include <linux/cred.h>
#include <linux/uuid.h>
#include <linux/of.h>
#include <net/addrconf.h>
#ifdef CONFIG_BLOCK
#include <linux/blkdev.h>
@ -1470,6 +1471,126 @@ char *flags_string(char *buf, char *end, void *flags_ptr, const char *fmt)
return format_flags(buf, end, flags, names);
}
static const char *device_node_name_for_depth(const struct device_node *np, int depth)
{
for ( ; np && depth; depth--)
np = np->parent;
return kbasename(np->full_name);
}
static noinline_for_stack
char *device_node_gen_full_name(const struct device_node *np, char *buf, char *end)
{
int depth;
const struct device_node *parent = np->parent;
static const struct printf_spec strspec = {
.field_width = -1,
.precision = -1,
};
/* special case for root node */
if (!parent)
return string(buf, end, "/", strspec);
for (depth = 0; parent->parent; depth++)
parent = parent->parent;
for ( ; depth >= 0; depth--) {
buf = string(buf, end, "/", strspec);
buf = string(buf, end, device_node_name_for_depth(np, depth),
strspec);
}
return buf;
}
static noinline_for_stack
char *device_node_string(char *buf, char *end, struct device_node *dn,
struct printf_spec spec, const char *fmt)
{
char tbuf[sizeof("xxxx") + 1];
const char *p;
int ret;
char *buf_start = buf;
struct property *prop;
bool has_mult, pass;
static const struct printf_spec num_spec = {
.flags = SMALL,
.field_width = -1,
.precision = -1,
.base = 10,
};
struct printf_spec str_spec = spec;
str_spec.field_width = -1;
if (!IS_ENABLED(CONFIG_OF))
return string(buf, end, "(!OF)", spec);
if ((unsigned long)dn < PAGE_SIZE)
return string(buf, end, "(null)", spec);
/* simple case without anything any more format specifiers */
fmt++;
if (fmt[0] == '\0' || strcspn(fmt,"fnpPFcC") > 0)
fmt = "f";
for (pass = false; strspn(fmt,"fnpPFcC"); fmt++, pass = true) {
if (pass) {
if (buf < end)
*buf = ':';
buf++;
}
switch (*fmt) {
case 'f': /* full_name */
buf = device_node_gen_full_name(dn, buf, end);
break;
case 'n': /* name */
buf = string(buf, end, dn->name, str_spec);
break;
case 'p': /* phandle */
buf = number(buf, end, (unsigned int)dn->phandle, num_spec);
break;
case 'P': /* path-spec */
p = kbasename(of_node_full_name(dn));
if (!p[1])
p = "/";
buf = string(buf, end, p, str_spec);
break;
case 'F': /* flags */
tbuf[0] = of_node_check_flag(dn, OF_DYNAMIC) ? 'D' : '-';
tbuf[1] = of_node_check_flag(dn, OF_DETACHED) ? 'd' : '-';
tbuf[2] = of_node_check_flag(dn, OF_POPULATED) ? 'P' : '-';
tbuf[3] = of_node_check_flag(dn, OF_POPULATED_BUS) ? 'B' : '-';
tbuf[4] = 0;
buf = string(buf, end, tbuf, str_spec);
break;
case 'c': /* major compatible string */
ret = of_property_read_string(dn, "compatible", &p);
if (!ret)
buf = string(buf, end, p, str_spec);
break;
case 'C': /* full compatible string */
has_mult = false;
of_property_for_each_string(dn, "compatible", prop, p) {
if (has_mult)
buf = string(buf, end, ",", str_spec);
buf = string(buf, end, "\"", str_spec);
buf = string(buf, end, p, str_spec);
buf = string(buf, end, "\"", str_spec);
has_mult = true;
}
break;
default:
break;
}
}
return widen_string(buf, buf - buf_start, end, spec);
}
int kptr_restrict __read_mostly;
/*
@ -1566,6 +1687,16 @@ int kptr_restrict __read_mostly;
* p page flags (see struct page) given as pointer to unsigned long
* g gfp flags (GFP_* and __GFP_*) given as pointer to gfp_t
* v vma flags (VM_*) given as pointer to unsigned long
* - 'O' For a kobject based struct. Must be one of the following:
* - 'OF[fnpPcCF]' For a device tree object
* Without any optional arguments prints the full_name
* f device node full_name
* n device node name
* p device node phandle
* P device node path spec (name + @unit)
* F device node flags
* c major compatible string
* C full compatible string
*
* ** Please update also Documentation/printk-formats.txt when making changes **
*
@ -1721,6 +1852,11 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
case 'G':
return flags_string(buf, end, ptr, fmt);
case 'O':
switch (fmt[1]) {
case 'F':
return device_node_string(buf, end, ptr, spec, fmt + 1);
}
}
spec.flags |= SMALL;
if (spec.field_width == -1) {

2
scripts/checkpatch.pl
View File

@ -5692,7 +5692,7 @@ sub process {
for (my $count = $linenr; $count <= $lc; $count++) {
my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
$fmt =~ s/%%//g;
if ($fmt =~ /(\%[\*\d\.]*p(?![\WFfSsBKRraEhMmIiUDdgVCbGN]).)/) {
if ($fmt =~ /(\%[\*\d\.]*p(?![\WFfSsBKRraEhMmIiUDdgVCbGNO]).)/) {
$bad_extension = $1;
last;
}

2
scripts/dtc/dtx_diff
View File

@ -338,7 +338,7 @@ DTC="${DTC} ${dtc_flags} -O dts -qq -f ${dtc_sort} -o -"
if (( ${cmd_diff} )) ; then
diff ${diff_flags} \
diff ${diff_flags} --label "${dtx_file_1}" --label "${dtx_file_2}" \
<(compile_to_dts "${dtx_file_1}") \
<(compile_to_dts "${dtx_file_2}")