pinctrl: sh-pfc: Use u32 to store register data

As PFC registers are either 8, 16, or 32 bits wide, use u32 (mostly
replacing unsigned long) to store (parts of) register values and masks.

Switch the shadow register operations from {set,clear}_bit() to plain C
bit operations, as the former can operate on long data only.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/gpio.c

@@ -21,7 +21,7 @@
 
 struct sh_pfc_gpio_data_reg {
 	const struct pinmux_data_reg *info;
-	unsigned long shadow;
+	u32 shadow;
 };
 
 struct sh_pfc_gpio_pin {
@@ -59,8 +59,8 @@ static void gpio_get_data_reg(struct sh_pfc_chip *chip, unsigned int offset,
 	*bit = gpio_pin->dbit;
 }
 
-static unsigned long gpio_read_data_reg(struct sh_pfc_chip *chip,
-					const struct pinmux_data_reg *dreg)
+static u32 gpio_read_data_reg(struct sh_pfc_chip *chip,
+			      const struct pinmux_data_reg *dreg)
 {
 	void __iomem *mem = dreg->reg - chip->mem->phys + chip->mem->virt;
 
@@ -68,8 +68,7 @@ static unsigned long gpio_read_data_reg(struct sh_pfc_chip *chip,
 }
 
 static void gpio_write_data_reg(struct sh_pfc_chip *chip,
-				const struct pinmux_data_reg *dreg,
-				unsigned long value)
+				const struct pinmux_data_reg *dreg, u32 value)
 {
 	void __iomem *mem = dreg->reg - chip->mem->phys + chip->mem->virt;
 
@@ -162,9 +161,9 @@ static void gpio_pin_set_value(struct sh_pfc_chip *chip, unsigned offset,
 	pos = reg->info->reg_width - (bit + 1);
 
 	if (value)
-		set_bit(pos, &reg->shadow);
+		reg->shadow |= BIT(pos);
 	else
-		clear_bit(pos, &reg->shadow);
+		reg->shadow &= ~BIT(pos);
 
 	gpio_write_data_reg(chip, reg->info, reg->shadow);
 }