Simon Glass [Mon, 2 Oct 2023 01:15:13 +0000 (19:15 -0600)]
test: Add helper to skip to partial console line
Sometimes we need to skip to a line but it includes addresses or other
information which can vary depending on the runtime conditions.
Add a new ut_assert_skip_to_linen() which is similar to the existing
ut_assert_skip_to_line() function but only checks that the console line
matches up to the length of the provided string.
Tom Rini [Wed, 13 Dec 2023 16:51:53 +0000 (11:51 -0500)]
Merge patch series "bootm: Refactoring to reduce reliance on CMDLINE (part A)"
To quote the author:
It would be useful to be able to boot an OS when CONFIG_CMDLINE is
disabled. This could allow reduced code size.
Standard boot provides a way to handle programmatic boot, without
scripts, so such a feature is possible. The main impediment is the
inability to use the booting features of U-Boot without a command line.
So the solution is to avoid passing command arguments and the like to
code in boot/
A similar process has taken place with filesystems, for example, where
we have (somewhat) separate Kconfig options for the filesystem commands
and the filesystems themselves.
This series starts the process of refactoring the bootm logic so that
it can be called from standard boot without using the command line.
Mostly it removes the use of argc, argv and cmdtbl from the internal
logic.
Some limited tidy-up is included, but this is kept to smaller patches,
rather than trying to remove all #ifdefs etc. Some function comments
are added, however.
A simple programmatic boot is provided as a starting point.
This work will likely take many series, so this is just the start.
Size growth with this series for firefly-rk3288 (Thumb2) is:
arm: (for 1/1 boards) all +23.0 rodata -49.0 text +72.0
but it is not included in this series as it is already large enough.
No functional change is intended in this series.
Changes in v3:
- Add a panic if programmatic boot fails
- Drop RFC tag
Changes in v2:
- Add new patch to adjust position of unmap_sysmem() in boot_get_kernel()
- Add new patch to obtain command arguments
- Fix 'boot_find_os' typo
- Pass in the command name
- Use the command table to provide the command name, instead of "bootm"
Simon Glass [Sat, 18 Nov 2023 21:05:19 +0000 (14:05 -0700)]
bootstd: Introduce programmatic boot
At present bootstd requires CONFIG_CMDLINE to operate. Add a new
'programmatic' boot which can be used when no command line is available.
For now it does almost nothing, since most bootmeths require the
command line.
Simon Glass [Sat, 18 Nov 2023 21:05:16 +0000 (14:05 -0700)]
bootm: Adjust the parameters of bootm_find_images()
Rather than passing it all the command-line args, pass in the pieces
that it needs. These are the image address, the ramdisk address/name
and the FDT address/name.
Ultimately this will allow usage of this function without being called
from the command line.
Move the function comment to the header file and tidy it a little.
Simon Glass [Sat, 18 Nov 2023 21:05:15 +0000 (14:05 -0700)]
bootm: optee: Drop special call to bootm_find_other()
The normal bootm flow calls bootm_find_other() can call the
BOOTM_STATE_FINDOTHER state as part of its processing. Fix the
condition there so that this hack can be removed.
Also drop the confusing check for the OS type, since do_bootm_tee() is
only called if the condition is met - see bootm_os_get_boot_func()
Simon Glass [Sat, 18 Nov 2023 21:05:14 +0000 (14:05 -0700)]
bootm: efi: Drop special call to bootm_find_other()
The normal bootm flow calls bootm_find_other() can call the
BOOTM_STATE_FINDOTHER state as part of its processing. Fix the
condition there so that this hack can be removed.
Simon Glass [Sat, 18 Nov 2023 21:05:13 +0000 (14:05 -0700)]
bootm: Simplify Android ramdisk addr in bootm_find_images()
The Android mechanism uses the loadaddr envrionment-variable to get the
load address, if none is provided. This is equivalent to
image_load_addr so use that instead, converting it to a string as
needed.
This change will permit passing img_addr to this function, in a future
change.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:05:09 +0000 (14:05 -0700)]
bootm: Pass image buffer to boot_get_fdt()
Rather than having boot_get_fdt() calculate this, move the calculation
into the caller. This removes the access to argv[0] in this function,
so we can later refactor it to just accept argv[2] instead of the whole
argv[].
Move the function comment to the header file and fix the u8 argument,
while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:05:07 +0000 (14:05 -0700)]
fdt: Allow use of fdt_support inside if() statements
Most of the fdt_support.h header file is included only if OF_LIBFDT or
OF_CONTROL are enabled. This means that calling functions defined in
that file must happen inside an #ifdef
This is unnecessary, so reduce the condition to just !USE_HOSTCC
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:05:06 +0000 (14:05 -0700)]
bootm: Reduce arguments to boot_get_ramdisk()
This function normally only uses one argument so pass it in directly.
Move comments to the header file so could one day include these
functions in API docs. Fix up the u8 argument while here, since it
avoids the compiler having to mask the value on some machines.
The Android case here is bit strange, since it can use argv[0], so deal
with that in the caller.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:05:04 +0000 (14:05 -0700)]
bootm: Move error printing out of boot_get_kernel()
The same error message is printed in two places. Move it out to the
caller so we can avoid passing in the command name. Leave the bootstage
handling where it is.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:04:58 +0000 (14:04 -0700)]
bootm: Reduce arguments to boot_get_kernel()
This function only uses one argument and just needs to know the name of
the command which called it. Adjust the function to use only what it
needs. This will make it easier to call from a non-command context.
Tidy up the function comment while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:04:57 +0000 (14:04 -0700)]
image: Tidy up genimg_get_kernel_addr_fit()
This function does not modify its first argument, so mark it const. Also
move the comments to the header file and expand them to provide more
useful information.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
Simon Glass [Sat, 18 Nov 2023 21:04:51 +0000 (14:04 -0700)]
mmc: env: Unify the U_BOOT_ENV_LOCATION conditions
The declaration of U_BOOT_ENV_LOCATION() uses a different #ifdef
condition from the code it calls. Use the same condition to avoid a
build warning if CONFIG_CMD_SAVEENV is disabled.
Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Simon Glass [Sat, 18 Nov 2023 21:04:50 +0000 (14:04 -0700)]
README: Correct docs for CONFIG_SPL_BUILD
This option is defined in both SPL and TPL builds, so correct the docs
related to this. Also point to spl_phase() which is normally a better
option. Mention VPL as well.
Signed-off-by: Simon Glass <sjg@chromium.org> Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tom Rini [Wed, 13 Dec 2023 16:25:18 +0000 (11:25 -0500)]
Merge patch series "some LED patches"
To quote the author:
I wanted to add support for ti,lp5562, and found an old submission
from Doug. While trying to modify that to work in current U-Boot, I
found a problem with the "move label handling to core" patches.
Patch 1 is a prerequisite for the ti,lp5562 driver, which turned out
to be needed by Christian as well.
Patch 2 is an attempt at (quick-)fixing the mentioned "move label
handling to core" problem. The real fix consists of changing remaining
drivers to not bind the same driver to the top node as to the child
nodes, but I can't test those other drivers.
Patch 3 introduces a helper which should allow removing some
boilerplate in most individual drivers, and 4,5 apply that in the gpio
and pwm drivers. Converting remaining drivers is trivial, but left out
for now.
Finally patch 6 is the reworked lp5562 driver. While I've changed it
to match existing DT bindings (with the goal of making it work with
our .dts that is known to work with the linux driver), most of the
logic is unchanged from Doug's original patch, so he is still listed
as author.
Changes in v2: Interchange order of patches 1 and 2, add a few R-bs,
and try to trim down the commit message in patch 2.
Doug Zobel [Fri, 17 Nov 2023 11:38:11 +0000 (12:38 +0100)]
led: add TI LP5562 LED driver
Driver for the TI LP5562 4 channel LED controller. Supports
independent on/off control of all 4 channels. Supports LED_BLINK on 3
independent channels: blue/green/red. The white channel can blink, but
shares the blue channel blink rate.
Heavily based on patch originally from Doug Zobel [1].
I have modified it so it matches the DT bindings in the linux tree,
and also follows the linux driver implementation more closely. This
should address Tom's concerns, and also matches my goal of making the
U-Boot driver work with our existing .dts which is known to work in
linux.
As our boards only have the R,G,B outputs connected, I have not
actually tested how the white channel behaves, but the R,G,B work
exactly as expected.
Rasmus Villemoes [Fri, 17 Nov 2023 11:38:08 +0000 (12:38 +0100)]
led: introduce led_bind_generic()
All existing drivers in drivers/led/ contain a .bind method that does
exactly the same thing, with just the actual driver name
differing. Create a helper so all those individual methods can be
changed to one-liners.
Reviewed-by: Marek Vasut <marex@denx.de> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Rasmus Villemoes [Fri, 17 Nov 2023 11:38:07 +0000 (12:38 +0100)]
led-uclass: do not create fallback label for top-level node
Many existing drivers, and led-uclass itself, rely on uc_plat->label
being NULL for the device representing the top node, as opposed to the
child nodes representing individual LEDs. This means that the drivers
whose .probe methods rely on this were broken by commit 83c63f0d1185
("led: Move OF "label" property parsing to core"), and also that the top
node wrongly shows up with 'led list'.
Binding the same driver to the top node as to the individual child
nodes is arguably wrong, and the approach of using a UCLASS_NOP driver
for the top node is probably better - this has for example been done in
commit 01074697801b ("led: gpio: Use NOP uclass driver for top-level
node") and commit 910b01c27c04 ("drivers: led: bcm6753: do not use null
label to find the top")
Until remaining affected drivers are fixed, we can use a heuristic
that only sets the label to the fallback value derived from the node
name if the node does not have a "compatible" property - i.e., if it
has been bound to the LED driver explicitly via
device_bind_driver_to_node(). This is similar to what commit e3aa76644c2a ("led: gpio: Check device compatible string to determine
the top level node") did for gpio_led, but that fix was then supplanted
by commit 01074697801b ("led: gpio: Use NOP uclass driver for top-level
node")
Fixes: 83c63f0d1185 ("led: Move OF "label" property parsing to core") Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Rasmus Villemoes [Fri, 17 Nov 2023 11:38:06 +0000 (12:38 +0100)]
led-uclass: honour ->label field populated by driver's own .bind
If the driver's own .bind method has populated uc_plat->label, don't
override that. This is necessary for an upcoming driver for ti,lp5562,
where the DT binding unfortunately says to use "chan-name" and not
"label".
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Marek Vasut [Sat, 7 Oct 2023 21:41:03 +0000 (23:41 +0200)]
test: bdinfo: Test both bdinfo and bdinfo -a
Factor out the core of test for all bdinfo output into bdinfo_test_all()
and then reuse it to verify that both 'bdinfo' and 'bdinfo -a' print all
the bdinfo output.
Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Marek Vasut [Sat, 7 Oct 2023 21:40:58 +0000 (23:40 +0200)]
cmd: bdinfo: Optionally use getopt and implement bdinfo -a
Add optional support for getopt() and in case this is enabled via
GETOPT configuration option, implement support for 'bdinfo -a'.
The 'bdinfo -a' behaves exactly like bdinfo and prints 'all' the
bdinfo information. This is implemented in preparation for other
more fine-grained options.
Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Chanho Park [Sun, 3 Dec 2023 08:30:40 +0000 (17:30 +0900)]
watchdog: Correct watchdog timeout print message
The wdt_start function takes timeout_ms as a parameter and starts the
watchdog with this value. However, when you output the message, it shows
the default timeout value for the watchdog device.
So this patch fixes that part to output the correct timeout value.
Before -->
StarFive # wdt start 3000
WDT: Started watchdog@13070000 without servicing (60s timeout)
After -->
StarFive # wdt start 3000
WDT: Started watchdog@13070000 without servicing (3s timeout)
Fixes: c2fd0ca1a822 ("watchdog: Integrate watchdog triggering into the cyclic framework") Signed-off-by: Chanho Park <chanho61.park@samsung.com> Reviewed-by: Stefan Roese <sr@denx.de>
Cong Dang [Mon, 19 Jun 2023 22:41:50 +0000 (00:41 +0200)]
ARM: dts: renesas: Disable RPC driver on R8A779G0 V4H White Hawk board
As requirement of CR side, QSPI Flash usage via RPC driver shall
be disabled and leaving the control of this module to CR side.
Perform DT modification to disable the RPC SPI.
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org> Signed-off-by: Cong Dang <cong.dang.xn@renesas.com> Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
[Marek: Do not modify defconfig, modify the DT instead, this way
the RPC SPI can be enabled without recompiling the U-Boot
itself. Update commit message accordingly.]
Use the phandle reference to &rpc node in arch/arm/dts/r8a779g0.dtsi
and remove properties which are already in arch/arm/dts/r8a779g0.dtsi.
No functional change and no resulting DT change.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Compiling with CONFIG_USB_XHCI_PCI and CONFIG_PCI=n results in
usb/host/xhci-pci.c:48:(.text.xhci_pci_probe+0x44):
undefined reference to `dm_pci_write_config32
Add the missing Kconfig dependency.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 07:23:30 +0000 (16:23 +0900)]
usb: storage: Use the correct CBW lengths
USB UFI uses fixed 12-byte commands (as does RBC, which is not
supported), but SCSI does not have this limitation. Use the correct
command block lengths depending on the subclass.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 06:37:43 +0000 (15:37 +0900)]
usb: xhci: Do not panic on event timeouts
Now that we always check the return value, just return NULL on timeouts.
We can still log the error since this is a problem, but it's not reason
to panic.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 06:37:41 +0000 (15:37 +0900)]
usb: xhci: Recover from halted bulk endpoints
There is currently no codepath to recover from this case. In principle
we could require that the upper layer do this explicitly, but let's just
do it in xHCI when the next bulk transfer is started, since that
reasonably implies whatever caused the problem has been dealt with.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 06:37:40 +0000 (15:37 +0900)]
usb: xhci: Allow context state errors when halting an endpoint
There is a race where an endpoint may halt by itself while we are trying
to halt it, which results in a context state error. See xHCI 4.6.9 which
mentions this case.
This also avoids BUGging when we attempt to stop an endpoint which was
already stopped to begin with, which is probably a bug elsewhere but
not a good reason to crash.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 06:37:39 +0000 (15:37 +0900)]
usb: xhci: Better error handling in abort_td()
If the xHC has a problem with our STOP ENDPOINT command, it is likely to
return a completion directly instead of first a transfer event for the
in-progress transfer. Handle that more gracefully.
We still BUG() on the error code, but at least we don't end up timing
out on the event and ending up with unexpected event errors.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Hector Martin [Sun, 29 Oct 2023 06:37:38 +0000 (15:37 +0900)]
usb: xhci: Guard all calls to xhci_wait_for_event
xhci_wait_for_event returns NULL on timeout, so the caller always has to
check for that. This addresses immediate explosions in this part
of the code when timeouts happen, but not the root cause for the
timeout.
Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Marek Vasut <marex@denx.de>
Christophe Leroy [Wed, 15 Nov 2023 18:36:36 +0000 (19:36 +0100)]
Fix stack-protector for powerpc
On powerpc, stack protector expects a function called
__stack_chk_fail_local() instead of __stack_chk_fail()
And some versions of GCC for powerpc default to TLS canary
instead of global canary, so always force GCC to use global
canary with -mstack-protector-guard=global
Cc: Joel Peshkin <joel.peshkin@broadcom.com> Fixes: 4e9bce12432 ("Add support for stack-protector") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
AKASHI Takahiro [Wed, 15 Nov 2023 01:53:45 +0000 (10:53 +0900)]
xen: pvblock: fix the maximum io size in one operation
The current implementation may cause BUG_ON() in blkfront_aio()
BUG_ON(n > BLKIF_MAX_SEGMENTS_PER_REQUEST);
In pvblock_iop(), a read/write operation will be split into smaller
chunks of data so that the size in one access (aio_nbytes) is limited
to, at the maximum,
BLKIF_MAX_SEGMENTS_PER_REQUEST * PAGE_SIZE
But this works only if when the *buffer* passed in to pvblock_io()
is page-aligned. If not, the given data region may stand across
(BLKIF_MAX_SEGMENTS_PER_REQUEST + 1) pages. See the logic in
blkfront_aio():
start = (uintptr_t)aiocbp->aio_buf & PAGE_MASK;
end = ((uintptr_t)aiocbp->aio_buf + aiocbp->aio_nbytes +
PAGE_SIZE - 1) & PAGE_MASK;
Then this will lead to BUG_ON() above.
This can be fixed by decreasing the maximum size of aio_nbytes.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Fixes: commit 3a739cc6c948 ("xen: pvblock: Implement front-back protocol and do IO")
Alex Bee [Tue, 14 Nov 2023 21:11:27 +0000 (22:11 +0100)]
timer-uclass: Always use "clock-frequency" property as fallback
Currently the "clock-frequency" DT property is only being considered as an
fallback if either there is no clock driver, the clock driver implements
the request-op correctly or there is no clock defined for the timer at all.
This patch makes "clock-frequency" also being picked as a fallback if
getting the clock-rate fails, since clk_get(_by_index) will return no
error, if a clock driver does not implement the request-op and does also
not support getting the rate of the clock in question.
timer_post_probe will take care if the property does not exist in the DT or
is defined as 0.
Tom Rini [Wed, 29 Nov 2023 03:31:09 +0000 (22:31 -0500)]
Merge patch series "cmd: add scmi command"
To quote the author:
"Scmi" command will be re-introduced per Michal's request.
The functionality is the same as I put it in my patch set of adding
SCMI base protocol support, but made some tweak to make UT, "ut dm
scmi_cmd," more flexible and tolerable when enabling/disabling a specific
SCMI protocol for test purpose.
Each commit may have some change history inherited from the preceding
patch series.
Test
====
The patch series was tested on the following platforms:
* sandbox
AKASHI Takahiro [Tue, 14 Nov 2023 02:14:28 +0000 (11:14 +0900)]
test: dm: add scmi command test
In this test, "scmi" command is tested against different sub-commands.
Please note that scmi command is for debug purpose and is not intended
in production system.
AKASHI Takahiro [Tue, 14 Nov 2023 02:14:26 +0000 (11:14 +0900)]
cmd: add scmi command for SCMI firmware
This command, "scmi", may provide a command line interface to various SCMI
protocols. It supports at least initially SCMI base protocol and is
intended mainly for debug purpose.
AKASHI Takahiro [Tue, 14 Nov 2023 02:14:24 +0000 (11:14 +0900)]
test: dm: skip scmi tests against disabled protocols
This is a precautionary change to make scmi tests workable whether or not
a specific protocol be enabled. If a given protocol is not configured,
we skip the test by returning -EAGAIN.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
Tom Rini [Wed, 29 Nov 2023 01:10:36 +0000 (20:10 -0500)]
Merge patch series "fs: fat: calculate FAT type based on cluster count"
To quote the author:
This series fixes an issue where the FAT type (FAT12, FAT16) is not
correctly detected, e.g. when the BPB field BS_FilSysType contains the
valid value "FAT ".
This issue occures, for example, if a partition is formatted by
swupdate using its diskformat handler. swupdate uses the FAT library
from http://elm-chan.org/fsw/ff/ internally.
See https://groups.google.com/g/swupdate/c/7Yc3NupjXx8 for a
discussion in the swupdate mailing list.
Please refer to the commit messages for more details.
1. Added bootsector checks
Most tests from https://www.win.tue.nl/~aeb/linux/fs/fat/fat-2.html
are added in the commit 'fs: fat: add bootsector validity check'.
Only the tests VIII, IX and X are not implemented.
I also checked the Linux kernel code (v6.6) and did not find any
checks on 'vistart->fs_type'. This is the reason why is skipped them
here.
See section '2. Size comparisons' for the impact on the binary size.
2. Size comparisons
I executed bloat-o-meter from the Linux kernel for an arm64
target (config xilinx_zynqmp_mini_emmc0_defconfig):
Comparison of the binary spl/u-boot-spl between master (rev e17d174773e9ba9447596708e702b7382e47a6cf) and this patch
series (including the added validity checks of the boot sector):
add/remove: 0/0 grow/shrink: 1/1 up/down: 100/-12 (88)
Function old new delta
read_bootsectandvi 308 408 +100
fat_itr_root 444 432 -12
Total: Before=67977, After=68065, chg +0.13%
When compare the size of the binary spl/u-boot-spl between master this
series without the the validity checks of the boot sector:
add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-24 (-24)
Function old new delta
read_bootsectandvi 308 296 -12
fat_itr_root 444 432 -12
Total: Before=67977, After=67953, chg -0.04%
So the size of the spl on this arm64 target increases by 88 bytes for
this series. When i remove the validity check the size decreases by 24 bytes.
Without this commit it is only possible to create filesystem images
with a size granularity of 1MB.
This commit adds the option to create file systems with different
sizes, e.g 8.5MB.
Signed-off-by: Christian Taedcke <christian.taedcke@weidmueller.com>
The tests fs_ext, fs_mkdir and fs_unlink support fat12 without
modifications.
The fs_basic test uses a partition that is too large for fat12, so it
is omitted here.
Signed-off-by: Christian Taedcke <christian.taedcke@weidmueller.com>
fs: fat: calculate FAT type based on cluster count
This fixes an issue where the FAT type (FAT12, FAT16) is not
correctly detected, e.g. when the BPB field BS_FilSysType contains the
valid value "FAT ".
According to the FAT spec the field BS_FilSysType has only
informational character and does not determine the FAT type.
The logic of this code is based on the linux kernel implementation
from the file fs/fat/inode.c function fat_fill_super().
For details about FAT see http://elm-chan.org/docs/fat_e.html
Signed-off-by: Christian Taedcke <christian.taedcke@weidmueller.com>
projects / u-boot.git / log