[PATCH] pinctrl: Add pinctrl-s3c24xx driver

[Kukjin Kim]

Heiko Stübner wrote:
> 
> The s3c24xx pins follow a similar pattern as the other Samsung SoCs and
> can therefore reuse the already introduced infrastructure.
> 
> The s3c24xx SoCs have one design oddity in that the first 4 external
> interrupts do not reside in the eint pending register but in the main
> interrupt controller instead. We solve this by forwarding the external
> interrupt from the main controller into the irq domain of the pin bank.
> The masking/acking of these interrupts is handled in the same way.
> 
> Furthermore the S3C2412/2413 SoCs contain another oddity in that they
> keep the same 4 eints in the main interrupt controller and eintpend
> register and requiring ack operations to happen in both. To solve this
> a ctrl_type enum is introduced which can keep the type of controller
> in the samsung_pin_ctrl struct for later retrieval.
> 
> The ctrl_type enum contains only S3C24XX and S3C2412 types, as the
> eint-speciality is currently the only use-case. But it can be expaned
> if other SoCs gain special handling requirements later on.
> 
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>

Looks good to me, need to implement more for other s3c24xx though.

Linus, if you want, please add:

Acked-by: Kukjin Kim <kgene.kim at samsung.com>

Thanks.

- Kukjin