platform: cznic: CZNIC_PLATFORMS should depend on ARCH_MVEBU

CZ.NIC's Turris devices are based on Marvell EBU SoCs. Hence add a
dependency on ARCH_MVEBU, to prevent asking the user about these driv

platform: cznic: CZNIC_PLATFORMS should depend on ARCH_MVEBU

CZ.NIC's Turris devices are based on Marvell EBU SoCs. Hence add a
dependency on ARCH_MVEBU, to prevent asking the user about these drivers
when configuring a kernel that cannot run on an affected CZ.NIC Turris
system.

Fixes: 992f1a3d4e88498d ("platform: cznic: Add preliminary support for Turris Omnia MCU")
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: fix HW_RANDOM dependency

There is still a build failure when the rwrng support is in a loadable
module but the mcu driver is built-in:

arm-linux-gnueabi-ld: drive

platform: cznic: turris-omnia-mcu: fix HW_RANDOM dependency

There is still a build failure when the rwrng support is in a loadable
module but the mcu driver is built-in:

arm-linux-gnueabi-ld: drivers/platform/cznic/turris-omnia-mcu-trng.o: in function `omnia_mcu_register_trng':
turris-omnia-mcu-trng.c:(.text.omnia_mcu_register_trng+0x11c): undefined reference to `devm_hwrng_register'

Change the dependency to explicitly disallow the broken
configuration.

Fixes: 41bb142a4028 ("platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG")
Reviewed-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Make GPIO code optional

Make the GPIO part of the driver optional, under a boolean config
option. Move the dependency to GPIOLIB and OF and the selection of
GPIOLI

platform: cznic: turris-omnia-mcu: Make GPIO code optional

Make the GPIO part of the driver optional, under a boolean config
option. Move the dependency to GPIOLIB and OF and the selection of
GPIOLIB_IRQCHIP to this new option.

This makes the turris-omnia-mcu driver available for compilation even if
GPIOLIB or OF are disabled.

Fixes: ed46f1f7731d ("platform: cznic: turris-omnia-mcu: fix Kconfig dependencies")
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Make poweroff and wakeup code optional

Make the system poweroff and RTC wakeup part of the driver optional,
under a boolean config option. Move the dependency to R

platform: cznic: turris-omnia-mcu: Make poweroff and wakeup code optional

Make the system poweroff and RTC wakeup part of the driver optional,
under a boolean config option. Move the dependency to RTC_CLASS to this
new option.

This makes the turris-omnia-mcu driver available for compilation even if
RTC_CLASS is disabled.

Fixes: ed46f1f7731d ("platform: cznic: turris-omnia-mcu: fix Kconfig dependencies")
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Make TRNG code optional

Make the TRNG part of the driver optional, under a boolean config
option.

This makes the driver turris-omnia-mcu available for compilation

platform: cznic: turris-omnia-mcu: Make TRNG code optional

Make the TRNG part of the driver optional, under a boolean config
option.

This makes the driver turris-omnia-mcu available for compilation even if
HW_RANDOM is disabled.

Fixes: ed46f1f7731d ("platform: cznic: turris-omnia-mcu: fix Kconfig dependencies")
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Make watchdog code optional

Make the watchdog part of the driver optional, under a boolean config
option. Move the dependency to WATCHDOG to this new option, and c

platform: cznic: turris-omnia-mcu: Make watchdog code optional

Make the watchdog part of the driver optional, under a boolean config
option. Move the dependency to WATCHDOG to this new option, and change
the WATCHDOG_CORE dependency to selection, as is done in most watchdog
drivers.

This makes the turris-omnia-mcu driver available for compilation even if
WATCHDOG is disabled.

Fixes: ed46f1f7731d ("platform: cznic: turris-omnia-mcu: fix Kconfig dependencies")
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: fix Kconfig dependencies

The newly added driver causes a Kconfig warning:

WARNING: unmet direct dependencies detected for RTC_CLASS
Depends on [n]: !S390 [=y]

platform: cznic: turris-omnia-mcu: fix Kconfig dependencies

The newly added driver causes a Kconfig warning:

WARNING: unmet direct dependencies detected for RTC_CLASS
Depends on [n]: !S390 [=y]
Selected by [m]:
- TURRIS_OMNIA_MCU [=m] && CZNIC_PLATFORMS [=y] && (MACH_ARMADA_38X || COMPILE_TEST [=y]) && I2C [=m] && OF [=y] && WATCHDOG [=y]

The problem here is that it selects entire subsystems, which normal
device drivers should not do. Changes all of these to 'depends on'
instead.

Fixes: dfa556e45ae9e ("platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs")
Fixes: 90e700fd12b61 ("platform: cznic: turris-omnia-mcu: Add support for poweroff and wakeup")
Fixes: ab89fb5fb92c7 ("platform: cznic: turris-omnia-mcu: Add support for MCU watchdog")
Fixes: 41bb142a40289 ("platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG")
Reported-by: Nathan Chancellor <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Depend on WATCHDOG

Add depend on WATCHDOG, otherwise modpost fails with
ERROR: modpost: "watchdog_init_timeout" [drivers/platform/cznic/turris-omnia-mcu.ko] unde

platform: cznic: turris-omnia-mcu: Depend on WATCHDOG

Add depend on WATCHDOG, otherwise modpost fails with
ERROR: modpost: "watchdog_init_timeout" [drivers/platform/cznic/turris-omnia-mcu.ko] undefined!
ERROR: modpost: "devm_watchdog_register_device" [drivers/platform/cznic/turris-omnia-mcu.ko] undefined!

Fixes: ab89fb5fb92c ("platform: cznic: turris-omnia-mcu: Add support for MCU watchdog")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Depend on OF

Add depend on OF, otherwise the compilation fails with
error: no member named 'of_gpio_n_cells' in 'struct gpio_chip'
error: no member named 'of_x

platform: cznic: turris-omnia-mcu: Depend on OF

Add depend on OF, otherwise the compilation fails with
error: no member named 'of_gpio_n_cells' in 'struct gpio_chip'
error: no member named 'of_xlate' in 'struct gpio_chip'

Fixes: dfa556e45ae9 ("platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Marek Behún <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG

Add support for true random number generator provided by the MCU.
New Omnia boards come without the Atmel SHA204-A chip. Instead

platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG

Add support for true random number generator provided by the MCU.
New Omnia boards come without the Atmel SHA204-A chip. Instead the
crypto functionality is provided by new microcontroller, which has
a TRNG peripheral.

Signed-off-by: Marek Behún <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Add support for MCU watchdog

Add support for the watchdog mechanism provided by the MCU.

Signed-off-by: Marek Behún <[email protected]>
Reviewed-by: Andy Shevchenk

platform: cznic: turris-omnia-mcu: Add support for MCU watchdog

Add support for the watchdog mechanism provided by the MCU.

Signed-off-by: Marek Behún <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Add support for poweroff and wakeup

Add support for true board poweroff (MCU can disable all unnecessary
voltage regulators) and wakeup at a specified time, implem

platform: cznic: turris-omnia-mcu: Add support for poweroff and wakeup

Add support for true board poweroff (MCU can disable all unnecessary
voltage regulators) and wakeup at a specified time, implemented via a
RTC driver so that the rtcwake utility can be used to configure it.

Signed-off-by: Marek Behún <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Acked-by: Alexandre Belloni <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs

Add support for GPIOs connected to the MCU on the Turris Omnia board.

This includes:
- front button pin
- enable pins for USB

platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs

Add support for GPIOs connected to the MCU on the Turris Omnia board.

This includes:
- front button pin
- enable pins for USB regulators
- MiniPCIe / mSATA card presence pins in MiniPCIe port 0
- LED output pins from WAN ethernet PHY, LAN switch and MiniPCIe ports
- on board revisions 32+ also various peripheral resets and another
voltage regulator enable pin

Signed-off-by: Marek Behún <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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platform: cznic: Add preliminary support for Turris Omnia MCU

Add the basic skeleton for a new platform driver for the microcontroller
found on the Turris Omnia board.

Signed-off-by: Marek Behún <k

platform: cznic: Add preliminary support for Turris Omnia MCU

Add the basic skeleton for a new platform driver for the microcontroller
found on the Turris Omnia board.

Signed-off-by: Marek Behún <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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