ARM: stm32mp: select ARM_USE_COMPRESSED_DTB for the whole arch ...

We'll probably be using compressed DTBs for all new boards as well, thus
move the ARM_USE_COMPRESSED_DTB, so it's always selected for STM32MP.

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

ARM: psci: implement PSCI client driver ...

System reset on the STM32MP may be done via PSCI when running TF-A
as first-stage boot loader. Provide a PSCI driver to simplify using it:

- A psci_invoke function is exported, so other code can use it
- A fixup for the PSCI device tree node is registered
- A reset and poweroff handler via PSCI is registered for PSCI >= v0.2

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

ARM: psci: wire in smc command help ...

The smc command has a help defined, but unused. Wire it in, so
help smc and smc -invalidoption work as expected.

While at it, remove the unimplemented -z option. It's unneeded,
because -c turns off the CPU after starting it again already.
Also it seems it's not implementable without interprocessor communication,
which is probably overkill here.

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

ARM: psci: use CONFIG_ARM_PSCI_DEBUG for smc command ...

There's already an option to use when debugging PSCI. Instead of
requiring users to #define DEBUG 1 as well, have the smc command be
usable when CONFIG_ARM_PSCI_DEBUG, not DEBUG is defined.

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

ARM: psci: translate PSCI error codes in smc command ...

For more usability, translate CPU_ON error codes into the error
descriptions found in the PSCI Platform Design Document[1].

[1]: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf

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

MIPS: loongsonl: pull headers from linux kernel ...

Signed-off-by: Du Huanpeng <u74147@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: enable STPMIC1 MFD and cell drivers ...

The STPMIC1 is the ST Microelectronics PMIC designed for use with
STM32MP. Enable it and its cell drivers by default in the defconfig.

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

ARM: dts: stm32mp157a-dk1: remove unnecessary sram node ...

This node has so far been unused and is a remnant from when the stm32mp
device drivers weren't completely upstream yet. Drop the node.

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

regulator: add driver for stpmic1-regulators ...

This commit imports the Linux v5.3 state of the driver. This allows us
to regulate at least the v3v3 voltage rail used by the DK1 and DK2
Ethernet PHY and SD-Card. Eventually, this driver should be used by the
USB host driver to supply the vbus voltage as well.

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

mfd: stpmic1: use dev_get_regmap instead of priv member ...

When we call regmap_init, the regmap is associated with the device
supplied and can be queried with dev_get_regmap. This is more natural
than expecting cell drivers to cast dev->parent->priv. Do it.

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

regulator: import linear voltage range helpers ...

The incoming stpmic1 regulator driver makes use of these helpers
internally. Thus port them out of Linux v5.3.

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

regulator: port Linux of_regulator_match ...

Linux regulator drivers like the pfuze and the incoming stpmic make use
of of_regulator_match to parse regulator init data from the device tree.
Port the function over from Linux v5.3, so drivers depending on it can
follow.

As we have no use in barebox for power saving and suspend states, these
parts are omitted.

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

regulator: copy upstream struct regulator_desc documentation ...

This imports the regulator_desc documentation for the fields barebox
uses out of Linux v5.4-rc1.

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

Documentation: boards: stm32mp: document boot mode strap pins ...

The evaluation kits have 2P DIP-Switches for boot mode selection.
Document them.

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

Documentation: boards: stm32mp: remove done TODOs ...

With SD/MMC controller and Ethernet MAC support merged, we now have
usable STM32MP support. Remove the text that suggested otherwise.

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

ARM: stm32mp: include new drivers in defconfig ...

We've had some new drivers added for the STM32MP since the defconfig was
first added. Include the newcomers.

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

net: eqos: extend Designware Ethernet QoS for Tegra 186 support ...

The U-Boot dwc_eth_qos driver ported in the previous commit had support
for both the Tegra 186/194 and STM32MP variants of the EQOS IP.

The barebox Tegra supported doesn't include the 186, but as the driver
was nevertheless ported along with the rest, lets include it in the
source tree.

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

net: add Designware Ethernet QoS for STM32MP ...

We already have Designware NIC support in barebox, but for the DWMAC1000,
the DWMAC4 (also called GMAC4), no support was mainline so far.

The DWMAC4 is different enough that sharing code with the DWMAC1000 is
not really that helpful, because even basics like MDIO registers have
different layout. Instead of coding bit masks and shifts into the driver
data, like Linux does, we'll keep both driver kinds separate.

Nevertheless, we collect functions that are not SoC-specific into a
separate 'library' file.

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

ARM: stm32mp: dk2: add barebox SD-Card update handler ...

Now with the SD/MMC controller supported, lets add a bbu handler, so we
can use it to update the second stage boot loader partition.

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

mci: stm32_sdmmc2: parse generic MCI oftree properties ...

mci_of_parse takes care of the generic oftree bits, like removable flag,
aliases and max-frequency. Insert it, so we can start to refer to the
controller's block devices by a fixed name.

Sticking in the mci_of_parse shows that the SD/MMC2 driver in barebox
doesn't play nicely with the device tree specification of the SD/MMC2
for the dk2 board, however:

Specifying the bus-width = <4> property in the device tree now made mmc
usage fail when reading the environment:

  ERROR: error SDMMC_STA_DCRCFAIL (0x81042) for cmd 18
  ERROR: stm32_sdmmc2_end_cmd: error SDMMC_STA_CTIMEOUT (0x4) for cmd 12
  WARNING: stm32_sdmmc2_send_cmd: cmd 12 failed, retrying ...
  ERROR: stm32_sdmmc2_end_cmd: error SDMMC_STA_CTIMEOUT (0x4) for cmd 12
  WARNING: stm32_sdmmc2_send_cmd: cmd 12 failed, retrying ...
  ERROR: stm32_sdmmc2_end_cmd: error SDMMC_STA_CTIMEOUT (0x4) for cmd 12
  WARNING: stm32_sdmmc2_send_cmd: cmd 12 failed, retrying ...
  ERROR: stm32_sdmmc2_end_cmd: error SDMMC_STA_CTIMEOUT (0x4) for cmd 12

We'll want to fix this eventually, but for now force the bus width to 1.
So we don't forget about this, print a notice to the console that we've
done so.

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

ARM: stm32mp: implement SoC and boot source identification ...

The BSEC OTP holds information about SoC type and package.
The Tamp registers hold information from the BootROM about boot
source. Add support for both.

Additionally, the tamp registers can also hold a request from the
operating system about what mode to enter after boot, e.g.
boot-into-recovery. A global function is exported for this, but
unused so far.

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

nvmem: add read support for STM32MP1 bsec OTP ...

The bsec on the STM32MP157C provides a 380 byte OTP. Add initial support
for reading and writing the shadow copy of the fuses. Direct fuse
access is not yet supported.

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

ARM: stm32mp: select ARM_SMCCC always ...

ARM_SMCCC compiles in the code for issuing ARM secure monitor calls.
We need those on the STM32MP, because barebox runs in non-secure mode
and does some operations like reading the BSEC OTP through SMCs.

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

ARM: sm: document SMC/PSCI related options ...

At least to me, the difference between these options were confusing at
first. Clear this up.

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

pinctrl: stm32: parse pinctrl nodes without subnodes as well ...

The bindings allow the pinmux node to occur directly in the node under
the pin controller as well. Check for this and support both types of
pinctrl specification.

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

pinctrl: demote dev_info on successful probes to dev_dbg ...

The SoC's pin controller is virtually always built and probed, so
there's is little information to gain from the fact it was successfully
probed. Have the success message show up as debug message to reduce probe
clutter like this:

	NOTICE: stm32-pinctrl soc:pin-controller@50002000.of: pinctrl/gpio driver registered
	NOTICE: stm32-pinctrl soc:pin-controller-z@54004000.of: pinctrl/gpio driver registered

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

pinctrl: stm32: fix debug print of uninitialized variable ...

mode and alt are printed with the dev_dbg before they are initialized.
Remedy this by moving the dev_dbg after them.

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

mci: add support for stm32mp sd/mmc controller ...

This driver was ported from u-boot v2019.10.
Instead of devicetree compatible it is using ARM AMBA id. So, there is
no need to patch devicetree with different compatible as it was
implemented in u-boot.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: enable ARM_AMBA ...

It is needed for mci/sd/mmc driver.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: stm32mp: select ARCH_HAS_RESET_CONTROLLER ...

Many STM32 peripherals, including I2C, SPI, USB and SDMMC use the RCC
reset controller for reset. Enable ARCH_HAS_RESET_CONTROLLER, so drivers
depending on RESET_CONTROLLER become available for selection.

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