Commit Graph

155 Commits

Author SHA1 Message Date
Linus Walleij
f7a388d6cd power: reset: Add a driver for the Gemini poweroff
The Gemini (SL3516) SoC has a special power controller block
that only deal with shutting down the system.

If you do not register a driver and activate the block, the
power button on the systems utilizing this SoC will do an
uncontrolled power cut, which is why it is important to have
a special poweroff driver.

The most basic functionality is to just shut down the system
by writing a special bit in the control register after the
system has reached pm_poweroff.

It also handles the poweroff from a button or other sources:

When the poweroff button is pressed, or a signal is sent to
poweroff from an infrared remote control, or when the RTC
fires a special alarm (!) the system emits an interrupt.
At this point, Linux must acknowledge the interrupt and
proceed to do an orderly shutdown of the system.

After adding this driver, pressing the poweroff button gives
this dmesg:

root@gemini:/
root@gemini:/ gemini-poweroff 4b000000.power-controller:
poweroff button pressed

calling shutdown scripts..
setting /dev/rtc0 from system time
unmounting file systems...
umount: tmpfs busy - remounted read-only
umount: can't unmount /: Invalid argument
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system poweroff
uhci_hcd 0000:00:09.1: HCRESET not completed yet!
uhci_hcd 0000:00:09.0: HCRESET not completed yet!
reboot: Power down
gemini-poweroff 4b000000.power-controller: Gemini power off

Cc: Janos Laube <janos.dev@gmail.com>
Cc: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-pm@vger.kernel.org
Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-04-14 01:41:33 +02:00
Guy Shapiro
f2c199db47 power: reset: syscon-poweroff: add a mask property
Make the syscon-poweroff driver accept value and mask instead of
just value.

Prior to this patch, the property name for the value was 'mask'. If
only the mask property is defined on a node, maintain compatibility
by using it as the value.

Signed-off-by: Guy Shapiro <guy.shapiro@mobi-wize.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-04-14 01:41:33 +02:00
Alexandre Belloni
b6d30432e0 power: reset: at91-reset: remove leftover platform_device_id
commit eacd8d09db ("power/reset: at91-reset: remove useless
at91_reset_platform_probe()") removed non DT probe support but forgot to
remove the now useless id_table. Do that now.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-01-18 17:05:46 +01:00
Szemző András
f22dfd86f0 power: reset: at91-reset: add samx7 support
Add samx7 support. It is lacking a few bits and needs a new reset function.

Signed-off-by: Szemző András <sza@esh.hu>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-01-18 17:05:38 +01:00
Alexandre Belloni
0b0408745e power: reset: at91-poweroff: timely shutdown LPDDR memories
LPDDR memories can only handle up to 400 uncontrolled power off. Ensure the
proper power off sequence is used before shutting down the platform.

Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2017-01-16 23:21:33 +01:00
Thomas Gleixner
8b0e195314 ktime: Cleanup ktime_set() usage
ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
2016-12-25 17:21:22 +01:00
Javier Martinez Canillas
93f7c27b4d power: reset: zx-reboot: Fix module autoload
If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/zx-reboot.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/zx-reboot.ko | grep alias
alias:          of:N*T*Czte,sysctrlC*
alias:          of:N*T*Czte,sysctrl

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-10-19 05:16:09 +02:00
Javier Martinez Canillas
0a27aa9c31 power: reset: syscon-reboot-mode: Fix module autoload
If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/syscon-reboot-mode.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/syscon-reboot-mode.ko | grep alias
alias:          of:N*T*Csyscon-reboot-modeC*
alias:          of:N*T*Csyscon-reboot-mode

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-10-19 05:16:09 +02:00
Javier Martinez Canillas
c9ba9b7763 power: reset: at91-poweroff: Fix module autoload
If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/at91-poweroff.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/at91-poweroff.ko | grep alias
alias:          of:N*T*Catmel,at91sam9x5-shdwcC*
alias:          of:N*T*Catmel,at91sam9x5-shdwc
alias:          of:N*T*Catmel,at91sam9rl-shdwcC*
alias:          of:N*T*Catmel,at91sam9rl-shdwc
alias:          of:N*T*Catmel,at91sam9260-shdwcC*
alias:          of:N*T*Catmel,at91sam9260-shdwc

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-10-19 05:16:09 +02:00
Javier Martinez Canillas
991de44036 power: reset: at91-reset: Fix module autoload
If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/at91-reset.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/at91-reset.ko | grep alias
alias:          of:N*T*Catmel,sama5d3-rstcC*
alias:          of:N*T*Catmel,sama5d3-rstc
alias:          of:N*T*Catmel,at91sam9g45-rstcC*
alias:          of:N*T*Catmel,at91sam9g45-rstc
alias:          of:N*T*Catmel,at91sam9260-rstcC*
alias:          of:N*T*Catmel,at91sam9260-rstc
alias:          platform:at91-sam9g45-reset
alias:          platform:at91-sam9260-reset

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-10-19 05:16:09 +02:00
Paul Burton
29676833df power: reset: Add Intel PIIX4 poweroff driver
Add a driver which allows powering off the system via an Intel PIIX4
southbridge, by entering the PIIX4 SOff state. This is useful on the
MIPS Malta development board, where it will power down the FPGA based
board until its ON/NMI button is pressed, or the QEMU implementation of
the MIPS Malta board where it will cause QEMU to exit.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-10-18 05:13:37 +02:00
Peter Griffin
8ad5d85efd power: reset: st-poweroff: Remove obsolete platforms.
This patch removes support for STiH415/6 SoC's from the
st-poweroff driver, as support for these platforms is
being removed from the kernel.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Cc: <linux-pm@vger.kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-09-19 21:32:22 +02:00
Arvind Yadav
7531be5cdf power: reset: zx-reboot: Unmap region obtained by of_iomap
Free memory mapping, if probe is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-09-19 21:25:41 +02:00
Arvind Yadav
896af83ef6 power: reset: xgene-reboot: Unmap region obtained by of_iomap
Free memory mapping, if probe is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-09-19 21:24:06 +02:00
Colin Ian King
1dff6ce026 power: reset: add in missing white space in error message text
A dev_err message spans two lines and the literal string is missing
a white space between words. Add the white space.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-09-19 21:19:46 +02:00
Sebastian Reichel
f7c8f1de03 Power Supply Fixes for 4.8 cycle
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Merge tag 'for-v4.8-rc' into psy-next

Power Supply Fixes for 4.8 cycle
2016-08-16 01:17:42 +02:00
Bjorn Andersson
8dfdd2a842 power: reset: syscon-reboot-mode: Use managed resource API
Use the managed resource version of reboot_mode_register().

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-08-16 00:29:34 +02:00
Bjorn Andersson
c1a9634f1a power: reset: reboot-mode: Add managed resource API
Provide managed resource version of reboot_mode_register() and
reboot_mode_unregister() to simplify implementations.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-08-16 00:29:22 +02:00
Arvind Yadav
bae170efd6 power: reset: hisi-reboot: Unmap region obtained by of_iomap
Free memory mapping, if probe is not successful.

Fixes: 4a9b373718 ("power: reset: move hisilicon reboot code")
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-08-12 22:42:37 +02:00
Andy Yan
7a4947cf6f power: reset: reboot-mode: fix build error of missing ioremap/iounmap on UM
commit 4fcd504edb ("power: reset: add reboot mode driver") uses api from
syscon, and syscon uses ioremap/iounmap which depends on HAS_IOMEM, so
let's depend on MFD_SYSCON instead of selecting it directly to avoid the
um-allyesconfig like build error on archs that without iomem:

drivers/mfd/syscon.c: In function 'of_syscon_register':
drivers/mfd/syscon.c:67:9: error: implicit declaration of function 'ioremap' [-Werror=implicit-function-declaration]
  base = ioremap(res.start, resource_size(&res));
         ^
drivers/mfd/syscon.c:67:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
  base = ioremap(res.start, resource_size(&res));
       ^
drivers/mfd/syscon.c:109:2: error: implicit declaration of function 'iounmap' [-Werror=implicit-function-declaration]
  iounmap(base);
  ^

Reported-by: Kbuild test robot <fengguang.wu@intel.com>
Fixes: 4fcd504edbf7("power: reset: add reboot mode driver")
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-08-12 22:42:36 +02:00
Linus Torvalds
43a0a98aa8 ARM: SoC driver updates for v4.8
Driver updates for ARM SoCs.
 
 A slew of changes this release cycle. The reset driver tree, that we merge
 through arm-soc for historical reasons, is also sizable this time around.
 
 Among the changes:
 
  - clps711x: Treewide changes to compatible strings, merged here for simplicity.
  - Qualcomm: SCM firmware driver cleanups, move to platform driver
  - ux500: Major cleanups, removal of old mach-specific infrastructure.
  - Atmel external bus memory driver
  - Move of brcmstb platform to the rest of bcm
  - PMC driver updates for tegra, various fixes and improvements
  - Samsung platform driver updates to support 64-bit Exynos platforms
  - Reset controller cleanups moving to devm_reset_controller_register() APIs
  - Reset controller driver for Amlogic Meson
  - Reset controller driver for Hisilicon hi6220
  - ARM SCPI power domain support
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Olof Johansson:
 "Driver updates for ARM SoCs.

  A slew of changes this release cycle.  The reset driver tree, that we
  merge through arm-soc for historical reasons, is also sizable this
  time around.

  Among the changes:

   - clps711x: Treewide changes to compatible strings, merged here for simplicity.
   - Qualcomm: SCM firmware driver cleanups, move to platform driver
   - ux500: Major cleanups, removal of old mach-specific infrastructure.
   - Atmel external bus memory driver
   - Move of brcmstb platform to the rest of bcm
   - PMC driver updates for tegra, various fixes and improvements
   - Samsung platform driver updates to support 64-bit Exynos platforms
   - Reset controller cleanups moving to devm_reset_controller_register() APIs
   - Reset controller driver for Amlogic Meson
   - Reset controller driver for Hisilicon hi6220
   - ARM SCPI power domain support"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (100 commits)
  ARM: ux500: consolidate base platform files
  ARM: ux500: move soc_id driver to drivers/soc
  ARM: ux500: call ux500_setup_id later
  ARM: ux500: consolidate soc_device code in id.c
  ARM: ux500: remove cpu_is_u* helpers
  ARM: ux500: use CLK_OF_DECLARE()
  ARM: ux500: move l2x0 init to .init_irq
  mfd: db8500 stop passing around platform data
  ASoC: ab8500-codec: remove platform data based probe
  ARM: ux500: move ab8500_regulator_plat_data into driver
  ARM: ux500: remove unused regulator data
  soc: raspberrypi-power: add CONFIG_OF dependency
  firmware: scpi: add CONFIG_OF dependency
  video: clps711x-fb: Changing the compatibility string to match with the smallest supported chip
  input: clps711x-keypad: Changing the compatibility string to match with the smallest supported chip
  pwm: clps711x: Changing the compatibility string to match with the smallest supported chip
  serial: clps711x: Changing the compatibility string to match with the smallest supported chip
  irqchip: clps711x: Changing the compatibility string to match with the smallest supported chip
  clocksource: clps711x: Changing the compatibility string to match with the smallest supported chip
  clk: clps711x: Changing the compatibility string to match with the smallest supported chip
  ...
2016-08-01 18:36:01 -04:00
Linus Torvalds
6f888fe31d ARM: SoC cleanups for v4.8
The cleanup branch keeps going down in size as we've completed a lot of
 the major legacy platform removals and conversions.
 
 A handful of changes this time around, some of the themes or larger sets are:
 
  - A bunch of i.MX cleanups around platform detection, init call cleanups
  - Misc fixes of missing/implicit includes
  - Removal of ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
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Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Olof Johansson:
 "The cleanup branch keeps going down in size as we've completed a lot
  of the major legacy platform removals and conversions.

  A handful of changes this time around, some of the themes or larger
  sets are:

   - A bunch of i.MX cleanups around platform detection, init call cleanups
   - Misc fixes of missing/implicit includes
   - Removal of ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB"

* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (40 commits)
  ARM: mps2: fix typo
  ARM: s3c64xx: avoid warning about 'struct device_node'
  bus: mvebu-mbus: make mvebu_mbus_syscore_ops static
  bus: mvebu-mbus: fix __iomem on register pointers
  ARM: tegra: Remove board_init_funcs array
  ARM: iop: Fix indentation
  ARM: imx: remove cpu_is_mx*()
  ARM: imx: remove last call to cpu_is_mx5*
  ARM: imx: rework mx27_pm_init() call
  ARM: imx: deconstruct mx3_idle
  ARM: imx: deconstruct mxc_rnga initialization
  ARM: imx: remove cpu_is_mx1 check
  ARM: i.MX: Do not explicitly call l2x0_of_init()
  ARM: i.MX: system.c: Tweak prefetch settings for performance
  ARM: i.MX: system.c: Replace magic numbers
  ARM: i.MX: system.c: Remove redundant errata 752271 code
  ARM: i.MX: system.c: Convert goto to if statement
  ARM: Kirkwood: fix kirkwood_pm_init() declaration/type
  ARM: Kirkwood: make kirkwood_disable_mbus_error_propagation() static
  ARM: orion5x: make orion5x_legacy_handle_irq static
  ...
2016-08-01 18:21:13 -04:00
Andy Yan
4fcd504edb power: reset: add reboot mode driver
This driver parses the reboot commands like "reboot bootloader"
and "reboot recovery" to get a boot mode described in the
device tree , then call the write interfae to store the boot
mode in some place like special register or sram, which can
be read by the bootloader after system reboot, then the bootloader
can take different action according to the mode stored.

This is commonly used on Android based devices, in order to
reboot the device into fastboot or recovery mode.

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
Tested-by: John Stultz <john.stultz@linaro.org>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-07-06 17:16:27 +02:00
Ben Dooks
0a14d280e1 power: vexpress: make dev_attr_active static
The dev_attr_active is not exported or defined to be used
outside the driver, so make it static to avoid the following
warning:

drivers/power/reset/vexpress-poweroff.c:77:1: warning: symbol 'dev_attr_active' was not declared. Should it be static?

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2016-06-13 09:55:51 +01:00
Ben Dooks
d04b674e18 power/reset: make syscon_poweroff() static
The syscon_poweroff() function is not exported or declared for
usage elsewhere, so make it static to avoid the folloiwing warning:

drivers/power/reset/syscon-poweroff.c:33:6: warning: symbol 'syscon_poweroff' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-06-10 03:52:13 +02:00
Chris Brand
783cb948d7 power: Introduce Broadcom kona reset driver
This driver supports reset on both BCM21664 and BCM23550.
Code is being moved from arch/arm/mach-bcm/board_bcm21664.c

Signed-off-by: Chris Brand <chris.brand@broadcom.com>
Acked-By: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2016-06-06 16:17:33 -07:00
Krzysztof Kozlowski
e771e0a1e4 power: reset: keystone: Enable COMPILE_TEST
Enable the COMPILE_TEST to get build coverage, except on platforms
!HAS_IOMEM (required by selected MFD_SYSCON).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-06-03 04:16:15 +02:00
Nicolas Ferre
f80cb48843 power: reset: at91-shdwc: add new shutdown controller driver
Sama5d2 SoC has a completely new shutdown controller with new features and
register layout. It thus makes sense to add a new driver for this new
peripheral.

This driver is Device Tree only and handles events from the wake-up pin and
the RTC.
As the register layout may change in the future, so some values are encoded
in a configuration structure.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-04-10 17:17:38 +02:00
Richard Weinberger
4f4bfe6bf1 power: reset: Fix dependencies for !HAS_IOMEM archs
Not every arch has io memory.
So, unbreak the build by fixing the dependencies.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-02-15 06:06:07 +01:00
Linus Walleij
3f652c969d power/reset: versatile: support the actual versatile
While this driver is named after the Versatile family of
boards (ARM reference designs) the machine actually called
Versatile was not supported. This patch makes the driver
handle also that machine. We augment the register names for
the reset to *VERSATILE* as well since it is the same
register offsets for Versatile and RealView.

Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2016-02-15 05:45:22 +01:00
Julia Lawall
c4c0edfbf8 power/reset: at91-reset: add missing of_node_put
for_each_matching_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression e,e1;
local idexpression np;
@@

 for_each_matching_node(np, e1) {
   ... when != of_node_put(np)
       when != e = np
(
   return np;
|
+  of_node_put(np);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-12-05 02:06:49 +01:00
Nicolas Ferre
bc312cbdfa power: reset: at91-reset/trivial: driver applies to SAMA5 family as well
This diver doesn't applies only on SAM9 SoC families but on SAMA5 families
as well.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:45:39 +02:00
Alexandre Belloni
064380a12e power/reset: at91-poweroff: get and use slow clock
Commit dca1a4b5ff ("clk: at91: keep slow clk enabled to prevent system
hang") added a workaround for the slow clock as it is not properly handled
by its users.

Get and use the slow clock as it is necessary for the at91 shutdown
controller.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:18:53 +02:00
Alexandre Belloni
6dd1ad1f23 power/reset: at91-poweroff: allow compiling as a module
It was not possible to compile at91-poweroff as a module. Implement
.remove() to allow it. Also switch to module_platform_driver_probe() as it
is not hotpluggable.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:18:53 +02:00
Alexandre Belloni
2b2c6148fe power/reset: at91-reset: get and use slow clock
Commit dca1a4b5ff ("clk: at91: keep slow clk enabled to prevent system
hang") added a workaround for the slow clock as it is not properly handled
by its users.

Get and use the slow clock as it is necessary for the at91 reset
controller.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:18:52 +02:00
Alexandre Belloni
6e64180a7c power/reset: at91-reset: allow compiling as a module
It was not possible to compile at91-reset as a module. Implement .remove()
to allow it. Also switch to module_platform_driver_probe() as it is not
hotpluggable.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:18:52 +02:00
Alexandre Belloni
eacd8d09db power/reset: at91-reset: remove useless at91_reset_platform_probe()
Since all the at91 platforms are now DT only, at91_reset_platform_probe()
is now useless, remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22 15:18:52 +02:00
Jun Nie
3309aa4941 power/reset: zx: Remove unnecessary include file
Including ARM related header file cause build failure
in i386 build because COMILE_TEST also involve building
zx driver. Remove the unnecessary include file.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-07-27 15:33:30 +02:00
Jun Nie
dd9f1486ae power/reset: zx: Register restart handler
Register with kernel restart handler instead of setting arm_pm_restart
directly.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-07-24 17:29:17 +02:00
Josh Wu
1ae25d626c power: reset: at91: add sama5d3 reset function
This patch introduces a new compatible string: "atmel,sama5d3-rstc" and
new reset function for sama5d3 and later chips.

As in sama5d3 or later chips, we don't have to shutdown the DDR
controller before reset. Shutdown the DDR controller before reset is a
workaround to avoid DDR signal driving the bus, but since sama5d3 and
later chips there is no such a conflict.

So in this patch:
   1. the sama5d3 reset function only need to write the rstc register
and return.
   2. we can remove the code related with sama5d3 DDR controller as
we don't use it at all.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-07-20 18:12:09 +02:00
Linus Torvalds
75462c8a87 Replace module_platform_driver with builtin_platform driver in non modules.
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Merge tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Pull module_platform_driver replacement from Paul Gortmaker:
 "Replace module_platform_driver with builtin_platform driver in non
  modules.

  We see an increasing number of non-modular drivers using
  modular_driver() type register functions.  There are several downsides
  to letting this continue unchecked:

   - The code can appear modular to a reader of the code, and they won't
     know if the code really is modular without checking the Makefile
     and Kconfig to see if compilation is governed by a bool or
     tristate.

   - Coders of drivers may be tempted to code up an __exit function that
     is never used, just in order to satisfy the required three args of
     the modular registration function.

   - Non-modular code ends up including the <module.h> which increases
     CPP overhead that they don't need.

   - It hinders us from performing better separation of the module init
     code and the generic init code.

  So here we introduce similar macros for builtin drivers.  Then we
  convert builtin drivers (controlled by a bool Kconfig) by making the
  following type of mapping:

    module_platform_driver()       --->  builtin_platform_driver()
    module_platform_driver_probe() --->  builtin_platform_driver_probe().

  The set of drivers that are converted here are just the ones that
  showed up as relying on an implicit include of <module.h> during a
  pending header cleanup.  So we convert them here vs adding an include
  of <module.h> to non-modular code to avoid compile fails.  Additonal
  conversions can be done asynchronously at any time.

  Once again, an unused module_exit function that is removed here
  appears in the diffstat as an outlier wrt all the other changes"

* tag 'module-builtin_driver-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  drivers/clk: convert sunxi/clk-mod0.c to use builtin_platform_driver
  drivers/power: Convert non-modular syscon-reboot to use builtin_platform_driver
  drivers/soc: Convert non-modular soc-realview to use builtin_platform_driver
  drivers/soc: Convert non-modular tegra/pmc to use builtin_platform_driver
  drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver
  drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver
  drivers/platform: Convert non-modular pdev_bus to use builtin_platform_driver
  platform_device: better support builtin boilerplate avoidance
2015-07-02 10:42:13 -07:00
Linus Torvalds
36a1624d88 power supply and reset changes for the v4.2 series
* New charger drivers: BQ24257, BQ25890, AXP288, RT9455
  * MAX17042 battery: add health & temperature support
  * BQ2415x charger: add ACPI support
  * misc. fixes and cleanups
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Merge tag 'for-4.2' of git://git.infradead.org/battery-2.6

Pull power supply and reset updates from Sebastian Reichel:

 - new charger drivers: BQ24257, BQ25890, AXP288, RT9455

 - MAX17042 battery: add health & temperature support

 - BQ2415x charger: add ACPI support

 - misc fixes and cleanups

* tag 'for-4.2' of git://git.infradead.org/battery-2.6: (32 commits)
  power_supply: Correct kerneldoc copy paste errors
  wm831x_power: Fix off-by-one at free_irq()
  power_supply: rt9455_charger: Fix error reported by static analysis tool
  power_supply: bq24257: use flags argument of devm_gpiod_get
  power_supply: bq25890: use flags argument of devm_gpiod_get
  sbs-battery: add option to always register battery
  power: Add devm_power_supply_get_by_phandle() helper function
  power_supply: max17042: Add OF support for setting thresholds
  power_supply: sysfs: Bring back write to writeable properties
  power_supply: rt9455_charger: Check if CONFIG_USB_PHY is enabled
  power: reset: gpio-restart: increase priority slightly
  power_supply: bq25890: make chip_id int
  power_supply: Add support for Richtek RT9455 battery charger
  Documentation: devicetree: Add Richtek RT9455 bindings
  of: Add vendor prefix for Richtek Technology Corporation
  power_supply: 88pm860x_charger: Do not call free_irq() twice
  power: bq24190_charger: Change first_time flag reset condition
  power: axp288_charger: axp288 charger driver
  power: max17042_battery: add HEALTH and TEMP_* properties support
  power_supply: Add support for TI BQ25890 charger chip
  ...
2015-06-23 16:10:27 -07:00
Paul Gortmaker
e35415e59f drivers/power: Convert non-modular syscon-reboot to use builtin_platform_driver
This file depends on Kconfig options all of which are a bool, so
we use the appropriate registration function, which avoids us
relying on an implicit inclusion of <module.h> which we are
doing currently.

While this currently works, we really don't want to be including
the module.h header in non-modular code, which we'd be forced
to do, pending some upcoming code relocation from init.h into
module.h.  So we fix it now by using the non-modular equivalent.

Cc: Sebastian Reichel <sre@kernel.org>
Acked-By: Sebastian Reichel <sre@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2015-06-16 14:12:38 -04:00
Heiko Stübner
bcd56fe1aa power: reset: gpio-restart: increase priority slightly
gpio-restart uses a priority of 128 and currently most soc-level restart
mechanisms use the same - with some exceptions even using 192.
But while the soc-level restarts are provided by the soc itself,
gpio-restarts will most of the time be board-specfic and be used
when some special board condition makes the soc-level restart
only a second choice.

The problem at hand manifested itself on the rk3288-veyron devices.
While the soc-level restart can sucessfully restart all other rockchip
boards I have, the veyron devices use an external restart mechanism that
seems to not only reset the soc but also some external needed components.

With both restart handlers having priority 128 in my tests the soc-specific
variant took precedent in all cases. While it could restart the soc
sucessfully in all cases, firmware then got an issue when talking to an
external component, resulting in the device being put into recovery mode.

So, give the board-specific restart handler a slight push and move it
to priority 129 to make it more important than the generic soc-specific
restart-handler.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-06-02 20:59:03 +02:00
Uwe Kleine-König
9f6cd98fc3 power: reset: ltc2952: use _optional variant of devm_gpiod_get
devm_gpiod_get_optional returns NULL if devm_gpiod_get would return an
ENOENT error pointer.

There is no semantic change intended.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-05-23 20:03:42 +02:00
Uwe Kleine-König
a34c0a8bf8 power: reset: gpio-poweroff: let devm_gpiod_get set direction of gpio
Since 39b2bbe3d7 (gpio: add flags argument to gpiod_get*() functions)
which appeared in v3.17-rc1, the gpiod_get* functions take an additional
parameter that allows to specify direction and initial value for output.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-05-23 20:03:30 +02:00
Krzysztof Kozlowski
3236672092 power: at91-reset: Constify platform_device_id
The platform_device_id is not modified by the driver and core uses it as
const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-05-23 19:44:23 +02:00
Thomas Gleixner
c3b5d3cea5 Merge branch 'linus' into timers/core
Make sure the upstream fixes are applied before adding further
modifications.
2015-05-19 16:12:32 +02:00
Florian Fainelli
0a73125d30 power: reset: Add MFD_SYSCON depends for brcmstb
The Broadcom STB reboot driver depends on MFD_SYSCON, it uses
syscon_regmap_lookup_by_phandle() which will not lookup syscon phandles
if MFD_SYSCON is disabled, and instead will return -ENOSYS since it is
turned into an inline stub.

Fixes: 030494e750 ("power: reset: Add reboot driver for brcmstb")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-05-01 22:48:28 +02:00
Thomas Gleixner
d8818257d3 power: reset: ltc2952: Remove bogus hrtimer_start() return value checks
The return value of hrtimer_start() tells whether the timer was
inactive or active already when hrtimer_start() was called.

The code emits a bogus warning if the timer was active already
claiming that the timer could not be started.

Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Frans Klaver <frans.klaver@xsens.com>
Cc: "René Moll" <linux@r-moll.nl>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-pm@vger.kernel.org
Acked-by: Frans Klaver <frans.klaver@xsens.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-04-30 17:47:17 +02:00