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
..
ABI	xen: branch for v5.6-rc1	2020-02-05 17:44:14 +00:00
EDID	docs: driver-api: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
PCI	Documentation: PCI: Fix pci_alloc_irq_vectors() function name typo	2019-12-30 08:21:29 -06:00
RCU	Merge branches 'doc.2019.12.10a', 'exp.2019.12.09a', 'fixes.2020.01.24a', 'kfree_rcu.2020.01.24a', 'list.2020.01.10a', 'preempt.2020.01.24a' and 'torture.2019.12.09a' into HEAD	2020-01-24 10:37:27 -08:00
accounting	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
admin-guide	Merge 5.6-rc5 into driver-core-next	2020-03-09 08:41:53 +01:00
arm	ARM: at91: Documentation: add sam9x60 product and datasheet	2020-01-10 23:40:31 +01:00
arm64	mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()	2020-02-20 10:03:14 +00:00
block	docs: block/biovecs: update the location of bio.c	2020-01-10 10:23:15 -07:00
bpf	bpf: Add s390 testing documentation	2019-10-30 16:25:31 +01:00
cdrom	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
core-api	mm, tree-wide: rename put_user_page*() to unpin_user_page*()	2020-01-31 10:30:38 -08:00
cpu-freq	Documentation: cpufreq: Update policy notifier documentation	2019-09-02 22:44:05 +02:00
crypto	crypto: algapi - make unregistration functions return void	2019-12-20 14:58:35 +08:00
dev-tools	Documentation: kunit: fixed sphinx error in code block	2020-02-10 17:16:42 -07:00
devicetree	ARM: SoC fixes	2020-03-08 17:36:22 -07:00
doc-guide	Documentation: build warnings related to missing blank lines after explicit markups has been fixed	2020-02-05 10:30:03 -07:00
driver-api	firmware: Add new platform fallback mechanism and firmware_request_platform()	2020-03-20 14:54:04 +01:00
fault-injection	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
fb	fbdev: fbmem: allow overriding the number of bootup logos	2020-01-03 14:27:40 +01:00
features	s390 updates for the 5.6 merge window #2	2020-02-05 17:33:35 +00:00
filesystems	debugfs: remove return value of debugfs_create_file_size()	2020-03-18 13:35:29 +01:00
firmware-guide	docs: firmware-guide: ACPI: Replace dma_request_slave_channel() with dma_request_chan()	2019-12-19 22:58:12 +01:00
firmware_class	…
fpga	Documentation: fpga: dfl: add descriptions for thermal/power management interfaces	2019-10-16 19:18:26 -07:00
gpu	drm-misc-next for v5.6:	2020-01-03 11:43:44 +10:00
hid	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
hwmon	docs: adm1177: fix a broken reference	2020-02-23 20:00:29 -08:00
i2c	docs: i2c: writing-clients: properly name the stop condition	2020-01-29 22:02:09 +01:00
ia64	docs: add SPDX tags to new index files	2019-07-15 11:03:03 -03:00
ide	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
iio	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
infiniband	Documentation/infiniband: update name of some functions	2019-09-13 16:55:55 -03:00
input	Input: docs: fix spelling mistake "potocol" -> "protocol"	2019-08-06 11:24:49 -06:00
isdn	isdn: capi: dead code removal	2019-12-11 09:12:38 +01:00
kbuild	kbuild: get rid of trailing slash from subdir- example	2020-02-27 10:03:27 +09:00
kernel-hacking	Documentation: kernel-hacking: hacking.rst: Change reference to document namespaces.rst to symbol-namespaces.rst	2019-12-19 09:36:23 -07:00
leds	leds: core: Add support for composing LED class device names	2019-07-25 20:07:52 +02:00
livepatch	livepatch: Documentation of the new API for tracking system state changes	2019-11-01 13:08:24 +01:00
locking	docs/locking: Fix outdated section names	2020-02-05 10:21:12 -07:00
m68k	docs: README.buddha: convert to ReST and add to m68k book	2019-07-31 13:30:10 -06:00
maintainer	Add a maintainer entry profile for documentation	2020-01-24 09:48:39 -07:00
media	media updates for v5.6-rc1	2020-01-31 14:43:23 -08:00
mic	docs: driver-api: add remaining converted dirs to it	2019-07-15 11:03:03 -03:00
mips	docs: fix some broken references	2019-10-10 11:25:39 -06:00
misc-devices	Documentation: fix Sphinx warning in xilinx_sdfec.rst	2019-12-19 09:26:25 -07:00
netlabel	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
networking	docs: networking: phy: Rephrase paragraph for clarity	2020-02-23 20:42:47 -08:00
nios2	docs: nios2: add it to the main Documentation body	2019-07-31 13:31:51 -06:00
nvdimm	docs: nvdimm: use ReST notation for subsection	2020-01-24 09:54:42 -07:00
openrisc	docs: openrisc: convert to ReST and add to documentation body	2019-07-31 13:30:20 -06:00
parisc	docs: parisc: convert to ReST and add to documentation body	2019-07-31 13:30:15 -06:00
pcmcia	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
power	Documentation: power: Drop reference to interface.rst	2020-02-20 11:50:59 +01:00
powerpc	powerpc updates for 5.6	2020-02-04 13:06:46 +00:00
process	Documentation/process: Swap out the ambassador for Canonical	2020-02-13 15:38:41 -08:00
riscv	It has been a relatively quiet cycle for documentation, but there's still a	2020-01-29 15:27:31 -08:00
s390	Documentation/s390: remove outdated debugging390 documentation	2019-08-21 12:41:43 +02:00
scheduler	Documentation/scheduler: fix links in sched-stats	2019-10-29 04:35:41 -06:00
scsi	scsi: smartpqi: Update attribute name to `driver_version`	2019-12-09 19:17:36 -05:00
security	Documentation: security: core.rst: fix warnings	2019-11-22 10:01:47 -07:00
sh	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
sound	sound updates for 5.6-rc1	2020-01-28 16:26:57 -08:00
sparc	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
sphinx	docs: Fix empty parallelism argument	2020-02-25 03:11:04 -07:00
sphinx-static	doc-rst: Reduce CSS padding around Field	2019-10-02 10:03:06 -06:00
spi	spi: docs: convert to ReST and add it to the kABI bookset	2019-07-31 14:13:13 -06:00
target	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
timers	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
trace	A handful of small documentation fixes that wandered in.	2020-02-07 13:03:10 -08:00
translations	Documentation/process: Swap out the ambassador for Canonical	2020-02-13 15:38:41 -08:00
usb	docs: usb: remove some broken references	2020-01-28 13:41:22 -07:00
userspace-api	staging: remove isdn capi drivers	2019-12-11 09:11:29 +01:00
virt	KVM: s390: rstify new ioctls in api.rst	2020-02-24 19:28:40 +01:00
vm	mm/zswap.c: add allocation hysteresis if pool limit is hit	2020-01-31 10:30:39 -08:00
w1	docs: w1: Fix a typo in omap-hdq.rst	2019-12-30 11:58:02 -07:00
watchdog	linux-watchdog 5.4-rc1 tag	2019-09-27 11:17:38 -07:00
x86	docs: remove MPX from the x86 toc	2020-02-25 03:10:22 -07:00
xtensa	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
.gitignore	…
COPYING-logo	docs: logo.txt: rename it to COPYING-logo	2019-07-15 09:20:27 -03:00
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	docs: DMA-API-HOWTO.txt: fix an unmarked code block	2019-07-15 09:20:24 -03:00
DMA-API.txt	dma-mapping: remove dma_release_declared_memory	2019-09-04 11:13:19 +02:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	dma-mapping: remove the DMA_ATTR_WRITE_BARRIER flag	2019-11-14 12:01:54 -04:00
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Kconfig	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
Makefile	Kbuild updates for v5.5	2019-12-02 17:35:04 -08:00
SubmittingPatches	…
asm-annotations.rst	Documentation: Call out example SYM_FUNC_* usage as x86-specific	2020-01-16 12:53:16 -07:00
atomic_bitops.txt	docs: atomic_bitops.txt: add a title for this document	2019-04-11 12:37:02 -06:00
atomic_t.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 16:12:03 -07:00
bus-virt-phys-mapping.txt	…
conf.py	doc-rst: Programmatically render MAINTAINERS into ReST	2019-10-02 10:03:17 -06:00
crc32.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
digsig.txt	…
docutils.conf	doc-rst: Add missing newline at end of file	2019-06-20 14:16:56 -06:00
dontdiff	modpost: dump missing namespaces into a single modules.nsdeps file	2019-11-11 20:10:01 +09:00
futex-requeue-pi.txt	…
hwspinlock.txt	hwspinlock: add the 'in_atomic' API	2019-06-29 21:08:14 -07:00
index.rst	Here's the main documentation changes for 5.5:	2019-12-02 11:51:02 -08:00
io-mapping.txt	…
io_ordering.txt	…
irqflags-tracing.txt	…
kobject.txt	…
kprobes.txt	Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2019-05-07 19:34:17 -07:00
kref.txt	…
logo.gif	…
lzo.txt	lib/lzo: fix bugs for very short or empty input	2019-04-05 16:02:30 -10:00
mailbox.txt	…
memory-barriers.txt	smp_mb__{before,after}_atomic(): update Documentation	2020-02-04 03:05:23 +00:00
nommu-mmap.txt	…
percpu-rw-semaphore.txt	…
pi-futex.txt	docs: locking: convert docs to ReST and rename to *.rst	2019-07-15 08:53:27 -03:00
preempt-locking.txt	x86/fpu: Remove fpu__restore()	2019-04-09 19:27:42 +02:00
rbtree.txt	docs: rbtree.txt: fix Sphinx build warnings	2019-07-15 09:20:24 -03:00
remoteproc.txt	remoteproc: add vendor resources handling	2019-06-29 12:02:17 -07:00
robust-futex-ABI.txt	…
robust-futexes.txt	futex: Update comments and docs about return values of arch futex code	2019-04-26 13:57:55 +01:00
rpmsg.txt	…
speculation.txt	docs: speculation.txt: mark example blocks as such	2019-04-11 12:37:03 -06:00
static-keys.txt	…
tee.txt	Documentation: tee: add AMD-TEE driver details	2020-01-04 13:49:51 +08:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	docs: unaligned-memory-access.txt: use a lowercase title	2019-04-11 12:37:03 -06:00
xz.txt	…