pinctrl: renesas: r8a77980: Add support for AVB/GE power-sources

Add support for configuring the I/O voltage levels of the Ethernet AVB
and Gigabit Ethernet pins on the R-Car V3H SoC.  "PIN_VDDQ_AVB" and
"PIN_VDDQ_GE" can be configured for 2.5V or 3.3V operation.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/3c26c4f3735a6d071685c507c065172e63af5d70.1678271030.git.geert+renesas@glider.be

drivers/pinctrl/renesas/pfc-r8a77980.c

@@ -35,7 +35,9 @@
 	PIN_NOGP_CFG(EXTALR, "EXTALR", fn, SH_PFC_PIN_CFG_PULL_UP_DOWN),	\
 	PIN_NOGP_CFG(FSCLKST, "FSCLKST", fn, SH_PFC_PIN_CFG_PULL_UP_DOWN),	\
 	PIN_NOGP_CFG(FSCLKST_N, "FSCLKST#", fn, SH_PFC_PIN_CFG_PULL_UP_DOWN),	\
-	PIN_NOGP_CFG(PRESETOUT_N, "PRESETOUT#", fn, SH_PFC_PIN_CFG_PULL_UP_DOWN)
+	PIN_NOGP_CFG(PRESETOUT_N, "PRESETOUT#", fn, SH_PFC_PIN_CFG_PULL_UP_DOWN), \
+	PIN_NOGP_CFG(VDDQ_AVB, "VDDQ_AVB", fn, SH_PFC_PIN_CFG_IO_VOLTAGE_25_33), \
+	PIN_NOGP_CFG(VDDQ_GE, "VDDQ_GE", fn, SH_PFC_PIN_CFG_IO_VOLTAGE_25_33)
 
 /*
  * F_() : just information
@@ -2837,24 +2839,39 @@ static int r8a77980_pin_to_pocctrl(unsigned int pin, u32 *pocctrl)
 {
 	int bit = pin & 0x1f;
 
-	*pocctrl = pinmux_ioctrl_regs[POCCTRL0].reg;
-	if (pin >= RCAR_GP_PIN(0, 0) && pin <= RCAR_GP_PIN(0, 21))
+	switch (pin) {
+	case RCAR_GP_PIN(0, 0) ... RCAR_GP_PIN(0, 21):
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL0].reg;
 		return bit;
-	else if (pin >= RCAR_GP_PIN(2, 0) && pin <= RCAR_GP_PIN(2, 9))
+
+	case RCAR_GP_PIN(2, 0) ... RCAR_GP_PIN(2, 9):
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL0].reg;
 		return bit + 22;
 
-	*pocctrl = pinmux_ioctrl_regs[POCCTRL1].reg;
-	if (pin >= RCAR_GP_PIN(2, 10) && pin <= RCAR_GP_PIN(2, 16))
+	case RCAR_GP_PIN(2, 10) ... RCAR_GP_PIN(2, 16):
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL1].reg;
 		return bit - 10;
-	if ((pin >= RCAR_GP_PIN(2, 17) && pin <= RCAR_GP_PIN(2, 24)) ||
-	    (pin >= RCAR_GP_PIN(3,  0) && pin <= RCAR_GP_PIN(3, 16)))
+
+	case RCAR_GP_PIN(2, 17) ... RCAR_GP_PIN(2, 24):
+	case RCAR_GP_PIN(3,  0) ... RCAR_GP_PIN(3, 16):
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL1].reg;
 		return bit + 7;
 
-	*pocctrl = pinmux_ioctrl_regs[POCCTRL2].reg;
-	if (pin >= RCAR_GP_PIN(2, 25) && pin <= RCAR_GP_PIN(2, 29))
+	case RCAR_GP_PIN(2, 25) ... RCAR_GP_PIN(2, 29):
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL2].reg;
 		return pin - 25;
 
-	return -EINVAL;
+	case PIN_VDDQ_AVB:
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL3].reg;
+		return 0;
+
+	case PIN_VDDQ_GE:
+		*pocctrl = pinmux_ioctrl_regs[POCCTRL3].reg;
+		return 1;
+
+	default:
+		return -EINVAL;
+	}
 }
 
 static const struct pinmux_bias_reg pinmux_bias_regs[] = {