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e4c2c0ff00
linux/drivers
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Hans de Goede e4c2c0ff00 firmware: Add new platform fallback mechanism and firmware_request_platform() 
In some cases the platform's main firmware (e.g. the UEFI fw) may contain
an embedded copy of device firmware which needs to be (re)loaded into the
peripheral. Normally such firmware would be part of linux-firmware, but in
some cases this is not feasible, for 2 reasons:

1) The firmware is customized for a specific use-case of the chipset / use
with a specific hardware model, so we cannot have a single firmware file
for the chipset. E.g. touchscreen controller firmwares are compiled
specifically for the hardware model they are used with, as they are
calibrated for a specific model digitizer.

2) Despite repeated attempts we have failed to get permission to
redistribute the firmware. This is especially a problem with customized
firmwares, these get created by the chip vendor for a specific ODM and the
copyright may partially belong with the ODM, so the chip vendor cannot
give a blanket permission to distribute these.

This commit adds a new platform fallback mechanism to the firmware loader
which will try to lookup a device fw copy embedded in the platform's main
firmware if direct filesystem lookup fails.

Drivers which need such embedded fw copies can enable this fallback
mechanism by using the new firmware_request_platform() function.

Note that for now this is only supported on EFI platforms and even on
these platforms firmware_fallback_platform() only works if
CONFIG_EFI_EMBEDDED_FIRMWARE is enabled (this gets selected by drivers
which need this), in all other cases firmware_fallback_platform() simply
always returns -ENOENT.

Reported-by: Dave Olsthoorn <dave@bewaar.me>
Suggested-by: Peter Jones <pjones@redhat.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200115163554.101315-5-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-20 14:54:04 +01:00
..
accessibility
acpi ACPI fixes for 5.6-rc4 2020-02-28 09:02:18 -08:00
amba
android binder: prevent UAF for binderfs devices II 2020-03-03 19:58:37 +01:00
ata libata-5.6-2020-02-05 2020-02-06 06:11:50 +00:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-01-28 16:02:33 -08:00
auxdisplay
base firmware: Add new platform fallback mechanism and firmware_request_platform() 2020-03-20 14:54:04 +01:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-01-28 16:02:33 -08:00
block xen: branch for v5.6-rc5 2020-03-07 08:04:54 -06:00
bluetooth Bluetooth: btrtl: Use kvmalloc for FW allocations 2020-01-24 19:57:53 +01:00
bus Few fixes for omaps for v5.6-rc cycle 2020-02-29 11:47:44 -08:00
cdrom scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places 2020-02-24 15:06:07 -05:00
char tpm: Initialize crypto_id of allocated_banks to HASH_ALGO__LAST 2020-02-17 20:47:06 +02:00
clk ARM: SoC: late updates 2020-02-08 14:17:27 -08:00
clocksource ARM: SoC: late updates 2020-02-08 14:17:27 -08:00
connector
counter
cpufreq cpufreq: Fix policy initialization for internal governor drivers 2020-02-27 08:57:48 +01:00
cpuidle ARM: SoC-related driver updates 2020-02-08 14:04:19 -08:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 2020-01-28 16:02:33 -08:00
dax dax: Get rid of fs_dax_get_by_host() helper 2020-01-16 09:52:27 -08:00
dca
devfreq Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs" 2020-02-24 11:14:29 +09:00
dio
dma dmaengine: imx-sdma: Fix the event id check to include RX event for UART6 2020-02-25 14:15:26 +05:30
dma-buf dma-buf: free dmabuf->name in dma_buf_release() 2020-02-27 18:01:58 +05:30
edac EDAC/synopsys: Do not print an error with back-to-back snprintf() calls 2020-02-27 16:44:25 +01:00
eisa
extcon
firewire
firmware Stable shared branch between EFI and driver tree 2020-03-20 14:50:48 +01:00
fpga fpga: xilinx-pr-decoupler: Remove clk_get error message for probe defer 2020-01-10 12:51:56 -08:00
fsi fsi: aspeed: add unspecified HAS_IOMEM dependency 2020-02-10 13:45:49 -08:00
gnss
gpio gpio: sifive: fix static checker warning 2020-02-10 13:54:17 +01:00
gpu Merge tag 'amd-drm-fixes-5.6-2020-03-05' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2020-03-06 11:06:33 +10:00
greybus
hid HID: hyperv: NULL check before some freeing functions is not needed. 2020-03-05 14:17:11 +00:00
hsi
hv - Most of the commits here are work to enable host-initiated hibernation 2020-02-03 14:42:03 +00:00
hwmon hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT() 2020-03-03 12:42:55 -08:00
hwspinlock hwspinlock: sirf: Use devm_hwspin_lock_register() to register hwlock controller 2020-01-21 16:16:36 -08:00
hwtracing coresight: etm4x: Fix unused function warning 2020-01-14 15:38:28 +01:00
i2c i2c: altera: Fix potential integer overflow 2020-02-13 09:29:30 +01:00
i3c i3c: master: dw: reattach device on first available location of address table 2020-01-13 10:00:05 +01:00
ide scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places 2020-02-24 15:06:07 -05:00
idle intel_idle: Introduce 'states_off' module parameter 2020-02-03 11:57:18 +01:00
iio chrome platform changes for 5.6 2020-02-04 07:17:41 +00:00
infiniband Second RDMA 5.6 pull request 2020-03-07 19:52:55 -06:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2020-02-15 16:49:25 -08:00
interconnect interconnect: Handle memory allocation errors 2020-03-03 08:02:57 +01:00
iommu iommu/arm-smmu: Restore naming of driver parameter prefix 2020-02-19 12:03:21 +01:00
ipack
irqchip irqchip/gic-v4.1: Avoid 64bit division for the sake of 32bit ARM 2020-02-09 15:47:37 -08:00
isdn proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
leds leds: lm3532: add pointer to documentation and fix typo 2020-01-22 21:08:24 +01:00
lightnvm
macintosh macintosh: therm_windtunnel: fix regression when instantiating devices 2020-02-29 21:13:22 +01:00
mailbox
mcb
md block-5.6-2020-03-07 2020-03-07 14:14:38 -06:00
media media: mc-entity.c: use & to check pad flags, not == 2020-02-24 15:10:04 +01:00
memory mvebu drivers for 5.6 (part 1) 2020-01-16 10:45:44 -08:00
memstick
message Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2020-01-19 22:10:04 +01:00
mfd chrome platform changes for 5.6 2020-02-04 07:17:41 +00:00
misc altera-stapl: altera_get_note: prevent write beyond end of 'key' 2020-03-03 08:02:57 +01:00
mmc ioremap changes for 5.6 2020-01-27 13:03:00 -08:00
mtd treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
mux
net net: dsa: mv88e6xxx: Fix masking of egress port 2020-02-27 12:29:09 -08:00
nfc nfc: pn544: Fix occasional HW initialization failure 2020-02-19 11:09:27 -08:00
ntb
nubus
nvdimm mm: Cleanup __put_devmap_managed_page() vs ->page_free() 2020-01-31 10:30:37 -08:00
nvme nvme-pci: Hold cq_poll_lock while completing CQEs 2020-02-28 01:32:14 +09:00
nvmem Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2020-02-07 12:54:13 -08:00
of of: property: Delete of_devlink kernel commandline option 2020-03-04 17:58:48 +01:00
opp ioremap changes for 5.6 2020-01-27 13:03:00 -08:00
oprofile tracing: Make struct ring_buffer less ambiguous 2020-01-13 13:19:38 -05:00
parisc proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
parport
pci PCI: brcmstb: Fix build on 32bit ARM platforms with older compilers 2020-02-27 08:06:20 -06:00
pcmcia
perf drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer 2020-03-02 12:07:35 +00:00
phy phy: for 5.6-rc 2020-03-04 13:28:52 +01:00
pinctrl pinctrl: Remove use of driver_deferred_probe_check_state_continue() 2020-03-04 18:11:44 +01:00
platform platform/chrome: wilco_ec: Include asm/unaligned instead of linux/ path 2020-02-11 09:10:36 +01:00
pnp proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
power ARM: SoC platform updates 2020-02-08 13:55:25 -08:00
powercap Merge back power capping changes for v5.6. 2020-01-13 10:32:19 +01:00
pps
ps3
ptp Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2020-01-19 22:10:04 +01:00
pwm pwm: Remove set but not set variable 'pwm' 2020-01-20 15:40:49 +01:00
rapidio
ras
regulator Merge 5.6-rc5 into driver-core-next 2020-03-09 08:41:53 +01:00
remoteproc remoteproc: qcom: q6v5-mss: Improve readability of reset_assert 2020-01-24 09:34:07 -08:00
reset reset: intel: add unspecified HAS_IOMEM dependency 2020-02-10 11:11:55 +01:00
rpmsg rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
rtc chrome platform changes for 5.6 2020-02-04 07:17:41 +00:00
s390 SCSI fixes on 20200229 2020-02-29 09:58:47 -06:00
sbus
scsi scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places 2020-02-24 15:06:07 -05:00
sfi
sh
siox siox: Use the correct style for SPDX License Identifier 2020-01-14 21:46:53 +01:00
slimbus slimbus: qcom: add missed clk_disable_unprepare in remove 2020-01-14 21:46:48 +01:00
soc i.MX fixes for 5.6: 2020-02-24 09:57:05 -08:00
soundwire soundwire: cadence: fix kernel-doc parameter descriptions 2020-01-16 17:34:38 +05:30
spi spi: Fixes for v5.6 2020-03-06 14:50:16 -06:00
spmi spmi: pmic-arb: Set lockdep class for hierarchical irq domains 2020-02-10 13:16:04 +01:00
ssb
staging TTY/Serial fixes for 5.6-rc5 2020-03-08 10:35:04 -05:00
target scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session" 2020-02-14 17:13:54 -05:00
tc The main MIPS changes for 5.6: 2020-01-31 11:28:31 -08:00
tee arm64: dts: agilex: fix gmac compatible 2020-03-03 16:40:56 -08:00
thermal - Fix a SEVERE docs build failure for cpu idle cooling device (Randy Dunlap) 2020-01-31 14:39:21 -08:00
thunderbolt thunderbolt: Prevent crash if non-active NVMem file is read 2020-02-13 04:59:30 -08:00
tty tty: serial: fsl_lpuart: free IDs allocated by IDA 2020-03-06 14:10:44 +01:00
uio uio: uio_pdrv_genirq: Do not log an error when deferring probe routine. 2020-01-14 15:27:51 +01:00
usb usb: dwc3: gadget: Update chain bit correctly when using sg list 2020-03-04 10:58:16 +01:00
vfio VFIO updates for v5.6-rc1 2020-02-03 22:22:05 +00:00
vhost vhost: Check docket sk_family instead of call getname 2020-02-22 21:41:42 -08:00
video ARM: SoC fixes 2020-03-08 17:36:22 -07:00
virt
virtio virtio_balloon: Fix memory leaks on errors in virtballoon_probe() 2020-02-06 03:40:27 -05:00
visorbus visorbus: fix uninitialized variable access 2020-01-14 15:30:35 +01:00
vlynq
vme Char/Misc driver changes for 5.6-rc1 2020-01-29 10:35:54 -08:00
w1 Char/Misc driver changes for 5.6-rc1 2020-01-29 10:35:54 -08:00
watchdog ACPI fixes for 5.6-rc4 2020-02-28 09:02:18 -08:00
xen xen/xenbus: fix locking 2020-03-05 09:42:23 -06:00
zorro Kbuild updates for v5.6 (2nd) 2020-02-09 16:05:50 -08:00
Kconfig
Makefile