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>
---
Changes from v1:
- use samsung_pinconf_get instead of samsung_pinconf_rw
- use "static const char * const" type declaration of reg_names
- skip condition change
drivers/pinctrl/samsung/pinctrl-samsung.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index 336e88d7bdb9..618945a0fd38 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -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 */
--
2.14.1
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
