[U-Boot] [U-Boot, v4, 5/8] rockchip: rk3399: Add improved pinctrl driver.

[Philipp Tomsich]

> The current pinctrl driver for the RK3399 has a range of qulity issues.
> E.g. it only implements the .set_state_simple() callback, it
> does not parse the available pinctrl information from the DTS
> (instead uses hardcoded values), is not flexible enough to cover
> devices without 'interrupt' field in the DTS (e.g. PWM),
> is not written generic enough to make code reusable among other
> rockchip SoCs...
> 
> This patch addresses these issues by reimplementing the whole driver
> from scratch using the .set_state() callback.
> The new implementation covers all featurese of the old code
> (i.e. it supports pinmuxing and pullup/pulldown configuration).
> 
> This patch has been tested on a RK3399-Q7 SoM (Puma).
> 
> Signed-off-by: Christoph Muellner <christoph.muellner at theobroma-systems.com>
> ---
> 
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/pinctrl/rockchip/pinctrl_rk3399.c | 227 ++++++++++++++++++++++++++++++
>  1 file changed, 227 insertions(+)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>