On Mon, Mar 26, 2018 at 5:27 PM, Chanho Park <parkch98@xxxxxxxxx> wrote:
> This patch adds a samsung_pin_dbg_show function to implement the
> pin_dbg_show callback function which can be used to show pin
> confuration values. Basically, it can show pin setting values by
> accessing the "pins" node like below:
>
> $ cat pins
> pin 0 (gpy7-0) CON(0x0) DAT(0x1) PUD(0x1) DRV(0x0) CON_PDN(0x0) PUD_PDN(0x0)
>
> Signed-off-by: Chanho Park <parkch98@xxxxxxxxx>
> ---
> drivers/pinctrl/samsung/pinctrl-samsung.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
> index 336e88d7bdb9..bdec0cbd64f1 100644
> --- a/drivers/pinctrl/samsung/pinctrl-samsung.c
> +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
> @@ -279,6 +279,30 @@ static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
> return 0;
> }
>
> +#ifdef CONFIG_DEBUG_FS
> +/* Forward declaration which can be used by samsung_pin_dbg_show */
> +static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
> + unsigned long *config, bool set);
> +static char *reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN", "PUD_PDN"};
This should be static const char. Please also add an empty line here.
> +static void samsung_pin_dbg_show(struct pinctrl_dev *pctldev,
> + struct seq_file *s, unsigned int pin)
> +{
> + enum pincfg_type cfg_type;
> + unsigned long config;
> + int ret;
> +
> + for (cfg_type = 0; cfg_type < PINCFG_TYPE_NUM; cfg_type++) {
> + config = PINCFG_PACK(cfg_type, 0);
> + ret = samsung_pinconf_rw(pctldev, pin, &config, false);
Use samsung_pinconf_get().
> + if (ret == -EINVAL)
if (ret < 0)
Best regards,
Krzysztof
> + continue;
> +
> + seq_printf(s, " %s(0x%lx)", reg_names[cfg_type],
> + PINCFG_UNPACK_VALUE(config));
> + }
> +}
> +#endif
> +
> /* list of pinctrl callbacks for the pinctrl core */
> static const struct pinctrl_ops samsung_pctrl_ops = {
> .get_groups_count = samsung_get_group_count,
> @@ -286,6 +310,9 @@ static const struct pinctrl_ops samsung_pctrl_ops = {
> .get_group_pins = samsung_get_group_pins,
> .dt_node_to_map = samsung_dt_node_to_map,
> .dt_free_map = samsung_dt_free_map,
> +#ifdef CONFIG_DEBUG_FS
> + .pin_dbg_show = samsung_pin_dbg_show,
> +#endif
> };
>
> /* check if the selector is a valid pin function selector */
> --
> 2.14.1
>
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