On Fri, Nov 11, 2016 at 05:50:35PM +0800, Chen-Yu Tsai wrote:
> The sunxi pinctrl driver only caches whatever pinconf setting was last
> set on a given pingroup. This is not particularly helpful, nor is it
> correct.
>
> Fix this by actually reading the hardware registers and returning
> the correct results or error codes. Also filter out unsupported
> pinconf settings. Since this driver has a peculiar setup of 1 pin
> per group, we can support both pin and pingroup pinconf setting
> read back with the same code. The sunxi_pconf_reg helper and code
> structure is inspired by pinctrl-msm.
>
> With this done we can also claim to support generic pinconf, by
> setting .is_generic = true in pinconf_ops.
>
> Also remove the cached config value. The behavior of this was never
> correct, as it only cached 1 setting instead of all of them. Since
> we can now read back settings directly from the hardware, it is no
> longer required.
>
> Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
> ---
> drivers/pinctrl/sunxi/pinctrl-sunxi.c | 86 +++++++++++++++++++++++++++++++++--
> drivers/pinctrl/sunxi/pinctrl-sunxi.h | 1 -
> 2 files changed, 81 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> index e04edda8629d..ed71bff39869 100644
> --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> @@ -438,15 +438,91 @@ static const struct pinctrl_ops sunxi_pctrl_ops = {
> .get_group_pins = sunxi_pctrl_get_group_pins,
> };
>
> +static int sunxi_pconf_reg(unsigned pin, enum pin_config_param param,
Sorry, this went unnoticed in your previous version, but checkpatch
reports:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
For this one and the next function.
Once fixed,
Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Thanks!
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
Attachment:
signature.asc
Description: PGP signature
