sh-pfc: Initialize pinmux_gpio flags statically

All function GPIO entries are initialized with the GPIO_FN macro that
expands to the PINMUX_GPIO macro, used to initialize real GPIOs. Create
a PINMUX_GPIO_FN macro that duplicates PINMUX_GPIO and sets flags to
PINMUX_TYPE_FUNCTION and use it in GPIO_FN, and make PINMUX_GPIO set
flags to PINMUX_TYPE_GPIO.

This removes the need to initialize GPIO flags at runtime and thus
simplifies the code, preparing for the GPIO and functions split.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/pinctrl.c

@@ -315,22 +315,6 @@ static const struct pinconf_ops sh_pfc_pinconf_ops = {
 	.pin_config_dbg_show	= sh_pfc_pinconf_dbg_show,
 };
 
-static void sh_pfc_map_one_gpio(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx,
-				struct pinmux_gpio *gpio, unsigned offset)
-{
-	struct pinmux_data_reg *dummy;
-	int bit;
-
-	gpio->flags &= ~PINMUX_FLAG_TYPE;
-
-	if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0)
-		gpio->flags |= PINMUX_TYPE_GPIO;
-	else {
-		gpio->flags |= PINMUX_TYPE_FUNCTION;
-		pmx->nr_functions++;
-	}
-}
-
 /* pinmux ranges -> pinctrl pin descs */
 static int sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)
 {
@@ -356,7 +340,8 @@ static int sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)
 		if (unlikely(!gpio->enum_id))
 			continue;
 
-		sh_pfc_map_one_gpio(pfc, pmx, gpio, i);
+		if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
+			pmx->nr_functions++;
 	}
 
 	return 0;

drivers/pinctrl/sh-pfc/sh_pfc.h

@@ -41,8 +41,18 @@ struct pinmux_gpio {
 	const char *name;
 };
 
-#define PINMUX_GPIO(gpio, data_or_mark) \
-	[gpio] = { .name = __stringify(gpio), .enum_id = data_or_mark, .flags = PINMUX_TYPE_NONE }
+#define PINMUX_GPIO(gpio, data_or_mark)			\
+	[gpio] = {					\
+		.name = __stringify(gpio),		\
+		.enum_id = data_or_mark,		\
+		.flags = PINMUX_TYPE_GPIO		\
+	}
+#define PINMUX_GPIO_FN(gpio, data_or_mark)		\
+	[gpio] = {					\
+		.name = __stringify(gpio),		\
+		.enum_id = data_or_mark,		\
+		.flags = PINMUX_TYPE_FUNCTION		\
+	}
 
 #define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
 
@@ -135,7 +145,7 @@ enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE };
 #define _GPIO_PORT(pfx, sfx) PINMUX_GPIO(GPIO_PORT##pfx, PORT##pfx##_DATA)
 #define PORT_ALL(str)	CPU_ALL_PORT(_PORT_ALL, PORT, str)
 #define GPIO_PORT_ALL()	CPU_ALL_PORT(_GPIO_PORT, , unused)
-#define GPIO_FN(str) PINMUX_GPIO(GPIO_FN_##str, str##_MARK)
+#define GPIO_FN(str) PINMUX_GPIO_FN(GPIO_FN_##str, str##_MARK)
 
 /* helper macro for pinmux_enum_t */
 #define PORT_DATA_I(nr)	\