[PATCH v2 11/18] pinctrl: Add pinctrl driver for STM32 MCUs

[Linus Walleij]

On Fri, Feb 20, 2015 at 7:01 PM, Maxime Coquelin
<mcoquelin.stm32 at gmail.com> wrote:

> This driver adds pinctrl and GPIO support to STMicrolectronic's
> STM32 family of MCUs.
>
> Pin muxing and GPIO handling have been tested on STM32F429
> based Discovery board.
>
> Signed-off-by: Maxime Coquelin <mcoquelin.stm32 at gmail.com>

(...)
> +config PINCTRL_STM32
> +       bool "STMicroelectronics STM32 pinctrl driver"
> +       depends on OF
> +       depends on ARCH_STM32 || COMPILE_TEST
> +       select PINMUX
> +       select PINCONF
> +       select GPIOLIB_IRQCHIP
> +       help
> +         This selects the device tree based generic pinctrl driver for STM32.

Good start! Especially that you use GPIOLIB_IRQCHIP.

But this (as discussed earlier) should select GENERIC_PINCONF

Stopping review here so you can reengineer it a bit using GENERIC_PINCONF
for next submission.

Also think about pinmux in single registers, whether you want to do this
with a single value for a register or using strings to identify groups
and functions.

Yours,
Linus Walleij