pinctrl: renesas: Add POCCTRL handling to r8a77990

Add definition of the POCCTRL register and bits therein to R8A77990 E3
pincontrol driver. This allows the pincontrol driver to configure SDHI
pin voltage according to power-source DT property.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

drivers/pinctrl/renesas/pfc-r8a77990.c

@@ -26,12 +26,12 @@
 	PORT_GP_18(0, fn, sfx),	\
 	PORT_GP_23(1, fn, sfx),	\
 	PORT_GP_26(2, fn, sfx),	\
-	PORT_GP_12(3, fn, sfx),	\
+	PORT_GP_CFG_12(3, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE),	\
 	PORT_GP_1(3, 12, fn, sfx),	\
 	PORT_GP_1(3, 13, fn, sfx),	\
 	PORT_GP_1(3, 14, fn, sfx),	\
 	PORT_GP_1(3, 15, fn, sfx),	\
-	PORT_GP_11(4, fn, sfx),	\
+	PORT_GP_CFG_11(4, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE),	\
 	PORT_GP_20(5, fn, sfx),	\
 	PORT_GP_18(6, fn, sfx)
 /*
@@ -5151,8 +5151,37 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = {
 	{ },
 };
 
+enum ioctrl_regs {
+	POCCTRL,
+};
+
+static const struct pinmux_ioctrl_reg pinmux_ioctrl_regs[] = {
+	[POCCTRL] = { 0xe6060380, },
+	{ /* sentinel */ },
+};
+
+static int r8a77990_pin_to_pocctrl(struct sh_pfc *pfc, unsigned int pin, u32 *pocctrl)
+{
+	int bit = -EINVAL;
+
+	*pocctrl = pinmux_ioctrl_regs[POCCTRL].reg;
+
+	if (pin >= RCAR_GP_PIN(3, 0) && pin <= RCAR_GP_PIN(3, 11))
+		bit = pin & 0x1f;
+
+	if (pin >= RCAR_GP_PIN(4, 0) && pin <= RCAR_GP_PIN(4, 10))
+		bit = (pin & 0x1f) + 19;
+
+	return bit;
+}
+
+static const struct sh_pfc_soc_operations r8a77990_pinmux_ops = {
+	.pin_to_pocctrl = r8a77990_pin_to_pocctrl,
+};
+
 const struct sh_pfc_soc_info r8a77990_pinmux_info = {
 	.name = "r8a77990_pfc",
+	.ops = &r8a77990_pinmux_ops,
 	.unlock_reg = 0xe6060000, /* PMMR */
 
 	.function = { PINMUX_FUNCTION_BEGIN, PINMUX_FUNCTION_END },
@@ -5165,6 +5194,7 @@ const struct sh_pfc_soc_info r8a77990_pinmux_info = {
 	.nr_functions = ARRAY_SIZE(pinmux_functions),
 
 	.cfg_regs = pinmux_config_regs,
+	.ioctrl_regs = pinmux_ioctrl_regs,
 
 	.pinmux_data = pinmux_data,
 	.pinmux_data_size = ARRAY_SIZE(pinmux_data),