pinctrl/lantiq: add functionality to falcon_pinconf_dbg_show

The current code only has a stub for falcon_pinconf_dbg_show.
This patch adds proper functionality.
Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-falcon.c

@@ -315,6 +315,37 @@ static int falcon_pinconf_set(struct pinctrl_dev *pctrldev,
 static void falcon_pinconf_dbg_show(struct pinctrl_dev *pctrldev,
 			struct seq_file *s, unsigned offset)
 {
+	unsigned long config;
+	struct pin_desc *desc;
+
+	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
+	int port = PORT(offset);
+
+	seq_printf(s, " (port %d) mux %d -- ", port,
+		pad_r32(info->membase[port], LTQ_PADC_MUX(PORT_PIN(offset))));
+
+	config = LTQ_PINCONF_PACK(LTQ_PINCONF_PARAM_PULL, 0);
+	if (!falcon_pinconf_get(pctrldev, offset, &config))
+		seq_printf(s, "pull %d ",
+			(int)LTQ_PINCONF_UNPACK_ARG(config));
+
+	config = LTQ_PINCONF_PACK(LTQ_PINCONF_PARAM_DRIVE_CURRENT, 0);
+	if (!falcon_pinconf_get(pctrldev, offset, &config))
+		seq_printf(s, "drive-current %d ",
+			(int)LTQ_PINCONF_UNPACK_ARG(config));
+
+	config = LTQ_PINCONF_PACK(LTQ_PINCONF_PARAM_SLEW_RATE, 0);
+	if (!falcon_pinconf_get(pctrldev, offset, &config))
+		seq_printf(s, "slew-rate %d ",
+			(int)LTQ_PINCONF_UNPACK_ARG(config));
+
+	desc = pin_desc_get(pctrldev, offset);
+	if (desc) {
+		if (desc->gpio_owner)
+			seq_printf(s, " owner: %s", desc->gpio_owner);
+	} else {
+		seq_printf(s, " not registered");
+	}
 }
 
 static void falcon_pinconf_group_dbg_show(struct pinctrl_dev *pctrldev,