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Commit 4e21264a authored by Chanho Park's avatar Chanho Park Committed by Linus Walleij
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pinctrl: samsung: add pin_dbg_show callback for debugfs 



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: default avatarChanho Park <parkch98@gmail.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Tested-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 60cc43fc

drivers/pinctrl/samsung/pinctrl-samsung.c

+29 −0
Original line number Diff line number Diff line
@@ -279,6 +279,32 @@ 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_get(struct pinctrl_dev *pctldev, unsigned int pin,

					unsigned long *config);

static const char * const reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN",

					 "PUD_PDN"};



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_get(pctldev, pin, &config);

		if (ret < 0)

			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 +312,9 @@ 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 */