image: add stm32 images to gitignore ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: add stm32image to .gitignore ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

video: backlight-pwm: set backlight dev.parent to hardware dev ...

backlight_register allocates a new backlight device. Populating the
device's parent field with the hardware device gives us more
informational devinfo output.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

video: backlight-pwm: remove unused struct member ...

pwm_backlight.max_value is unused anywhere. Drop it.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

stm32mp: init: fix up st, package into stm32mp pinctrl nodes ...

Since Linux v5.1, the pinctrl driver can use the st,package property
if provided to validate whether the ball to be configured exists
on the package. The upstream device trees provide this property,
but if we'll want barebox to supply it instead, so we can use the same
barebox binary for different SoC variants.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kbuild: resync top Makefile, mkmakefile, tags.sh with Linux 5.7-rc4 ...

The prologue of the build system is not specific to Linux or Barebox.
Paritially resync with Linux 5.7-rc4

- In Linux, $(objtree) is always '.', and $(srctree) might be relative.
  I am keeping both absolute for now to avoid unexpected breakage.

- I did not resync single target for now. We need to touch
  Makefile.build a lot if we want to resync it.

- 'export CDPATH=' is Barebox-only code, which was added by
  commit 6cc8d0544658 ("Makefile: disable CDPATH"). Keep it.

- KBUILD_SRC no longer exists in the upstream Linux. I replaced it
  with building_out_of_srctree.

- scripts/mkmakefile does not contain anything specific to Linux or
  Barebox. Resync it with Linux 5.7-rc4

- scripts/tags was imported from Linux 3.6 with some cherry-picks on
  top of that. Resync it with Linux 5.7-rc4

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch: remove KBUILD_SRC checks from arch Makefile ...

You can always add $(srctree)/ to the mach include path.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

module.h: split out the EXPORT_SYMBOL into export.h ...

Do as Linux commit f501693

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kbuild: add -Wall to KBUILD_HOSTCXXFLAGS ...

[ Linux commit 735aab1 ]

Add -Wall to catch more warnings for C++ host programs.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kbuild: add -Werror={strict-prototypes, implicit-int} to KBUILD_CFLAGS ...

- Turn Wstrict-prototypes into an error
- Add -Werror=implicit-int
- Use the standard form -Werror=... for implicit-function-declaration

This commit imports the following Linux commits. They should work for
barebox too.

80970472179a Makefile: enable -Werror=implicit-int and -Werror=strict-prototypes by default
eeb5687a7139 kbuild: add -Werror=strict-prototypes flag unconditionally
61a0902a06d6 kbuild: add -Werror=implicit-int flag unconditionally
b89f25ea7892 kbuild: use -Werror=implicit-... instead of -Werror-implicit-...

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: dts: vexpress-v2p-ca9: adapt fixed NOR flash partition setup ...

Upstream DTS commit 62a5017bf825c9e4d317 ("ARM: dts: vexpress: specify
AFS partition") [1] introduced an empty node at /smb@4000000
/motherboard/flash@0,00000000/partitions, which is preferred by the OF
partitions parser over the single partition nodes. In the same commit,
upstream set the compatible to "arm,arm-firmware-suite", which barebox
does not know about. Adapt our fixed partition setup accordingly by
wrapping all partitions in an extra "partitions" node with the correct
compatible.

[1]: https://git.kernel.org/linus/62a5017bf825c9e4d3176eb975a01c329a9f36

Fixes: 6940ba22c66ac1c71350 ("dts: update to v5.3-rc1")
Signed-off-by: Roland Hieber <rhi@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX6: boot: handle i.MX6UL differences ...

The i.MX6UL differs from the i.MX6Q in the interpretation of the first
two values for BOOT_CFG(7, 4):

+--------------+----------+----------+
|BOOT_CFG1(7,4)|   0x01   |   0x02   |
|==============+==========+==========|
| MX6Q         | reserved |   SATA   |
|--------------+----------+----------|
| MX6UL        |   QSPI   | reserved |
+--------------+----------+----------+

The reserved (forced serial) values are handled in the previous commit.
Add QSPI boot source detection now.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: boot: interpret reserved boot as forced serial ...

`mw 0x20d8040 0x00000010; mw 0x20d8044 0x10000000; reset` issued on an
i.MX6Q forces serial download mode, but there is no indication of that
in the sbmr2 register, so barebox reports $bootsource=unknown.

Similarly, `mw 0x20d8040 0x00000020; mw 0x20d8044 0x10000000; reset`
forces an i.MX6UL into recovery mode after reset.

Do as U-Boot does and interpret the (reserved) value in BOOT_CFG1(7, 4)
for each SoC as serial download.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nvmem: bsec: remove wrongly named bsec_field type ...

BSEC_SMC_READ_SHADOW and BSEC_SMC_WRITE_SHADOW aren't fields, but
operations to apply on fields. Rename it accordingly and fix up instances
where it was used wrongly.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nvmem: bsec: allow reads at unaligned offsets ...

Setting the NVMEM stride to 4 means we can't have nvmem cells pointing
at odd addresses. Linux sets it to 1 instead and handles reads at
unaligned addresses by splitting them up to aligned chunks. Copy over
the code to do the same. Unaligned writes remain illegal.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: init: fix up CPU device tree nodes ...

To facilitate using the same barebox binary for multiple variants of the
STM32MP15x, have it fix up the CPU device tree nodes.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: init: detect Revision Z and 800 MHz profiles ...

Revision A was 0x1000 and B was 0x2000, so I assumed the next would
be revision C valued 0x3000. Alas, it's revision Z with 0x2001...

Change the code accordingly and add detection for the new 800Mhz
profiles.

Code taken from U-Boot commit
cf0818b477 ("stm32mp1: support of STM32MP15x Rev.Z") and
Patch[1] "stm32mp1: add 800 MHz profile support".

[1]: https://st-md-mailman.stormreply.com/pipermail/uboot-stm32/2020-February/002170.html

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: init: don't cast signed error to unsigned ...

bsec_read_field returns a negative value on error, pass it along
signed. This doesn't matter now, because we ignore the error code, but
it's the correct thing to do.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: add COMPILE_TEST prompts for some off-by-default options ...

Some Kconfig options we have are promptless and off-by-default and
instead can only be enabled by being selected from platform options.

For some of those that aren't compile testable, add a new
COMPILE_TEST-only prompt.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: add COMPILE_TEST prompts to some on-by-default drivers ...

Many clock source and GPIO controller drivers don't have a prompt, but
are instead default y if their respective platform is enabled. Maintain
this behavior, but add a prompt for when COMPILE_TEST is enabled, so
they can be included in test builds.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: mark first batch of compilable drivers for COMPILE_TEST ...

All of these drivers have a runtime dependency on SoC peripherals, but
can nevertheless be compile-tested. Add COMPILE_TEST as an alternate
dependency.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: introduce COMPILE_TEST option for build-testing ...

Compile-time analysis may help us catch latent bugs in barebox. For this
to be most effective, we need an easy way to compile as much of barebox
as possible. Giving all driver options prompts would do this, but at the
cost of making user experience worse, by asking them about drivers for HW
that's clearly not relevant to the platform they selected.

Do as Linux does and provide a default-off COMPILE_TEST option, which we
can use to make extra drivers selectable.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: explicitly select dependency STMP_DEVICE for i.MX23/28 drivers ...

Some of the i.MXs drivers can be build tested even if building for other
platforms. Support adding a future COMPILE_TEST dependency to some of
these drivers by explicitly having their Kconfig symbol select STMP_DEVICE
if the driver calls stmp_reset_block.

This has not been necessary for the normal build, because the ARCH
symbols for the IMX23 and IMX28 already selected STMP_DEVICE.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: at91: Move mci platform data to include/ ...

To be able to add the Atmel mci driver to COMPILE_TEST move the
definition of struct atmel_mci_platform_data to include/ where it
can be reached from foreign SoCs as well.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: boot: correctly handle SRC_SBMR1 override via SRC_GPR9 ...

`mw 0x20d8040 0x08000030; mw 0x20d8044 0x10000000; reset` issued on an
i.MX6Q forces boot from the ecspi1. This is because the BootROM reads
the boot mode out of SRC_GPR9 instead of SRC_SBMR1 whenever SRC_GPR10
has its 28th bit set.

Teach barebox about this, so we don't end up with a wrong $bootsource
when putting SRC_GPR9 into use.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: configurable Super Root Key index ...

Allow the configuration of the Super Root Key Index, to let the user
select another key if a previous key has been revoked.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: dlink-dir-320: remove useless board file ...

The board file calls only barebox_set_hostname().
Since we can extract host name from devicetree,
we can drop board file.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

dts: update to v5.7-rc4 ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mmc: mxs: implement detect callback ...

Needed to automatically detect the SD card when it contains the barebox
environment.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

serial: mxs auart: Set Linux console name ...

The MXS AUART is in the kernel known as "ttyAPP". Set the Linux console
name to make automatic setting of the console= Kernel parameter work.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>