Merge tag 'renesas-pinctrl-for-v5.12-tag1' of...

Merge tag 'renesas-pinctrl-for-v5.12-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel

pinctrl: renesas: Updates for v5.12

  - Restrict debug runtime-checks to Renesas platforms,
  - Initial support for the R-Car V3U SoC.

Documentation/devicetree/bindings/pinctrl/renesas,pfc.yaml

@@ -43,11 +43,12 @@ properties:
       - renesas,pfc-r8a77980    # R-Car V3H
       - renesas,pfc-r8a77990    # R-Car E3
       - renesas,pfc-r8a77995    # R-Car D3
+      - renesas,pfc-r8a779a0    # R-Car V3U
       - renesas,pfc-sh73a0      # SH-Mobile AG5
 
   reg:
     minItems: 1
-    maxItems: 2
+    maxItems: 10
 
   gpio-controller: true
 

drivers/pinctrl/renesas/Kconfig

@@ -36,6 +36,7 @@ config PINCTRL_RENESAS
 	select PINCTRL_PFC_R8A77980 if ARCH_R8A77980
 	select PINCTRL_PFC_R8A77990 if ARCH_R8A77990
 	select PINCTRL_PFC_R8A77995 if ARCH_R8A77995
+	select PINCTRL_PFC_R8A779A0 if ARCH_R8A779A0
 	select PINCTRL_PFC_SH7203 if CPU_SUBTYPE_SH7203
 	select PINCTRL_PFC_SH7264 if CPU_SUBTYPE_SH7264
 	select PINCTRL_PFC_SH7269 if CPU_SUBTYPE_SH7269
@@ -142,6 +143,10 @@ config PINCTRL_PFC_R8A77970
 	bool "pin control support for R-Car V3M" if COMPILE_TEST
 	select PINCTRL_SH_PFC
 
+config PINCTRL_PFC_R8A779A0
+	bool "pin control support for R-Car V3U" if COMPILE_TEST
+	select PINCTRL_SH_PFC
+
 config PINCTRL_PFC_R8A7740
 	bool "pin control support for R-Mobile A1" if COMPILE_TEST
 	select PINCTRL_SH_PFC_GPIO

drivers/pinctrl/renesas/Makefile

@@ -29,6 +29,7 @@ obj-$(CONFIG_PINCTRL_PFC_R8A77970)	+= pfc-r8a77970.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77980)	+= pfc-r8a77980.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77990)	+= pfc-r8a77990.o
 obj-$(CONFIG_PINCTRL_PFC_R8A77995)	+= pfc-r8a77995.o
+obj-$(CONFIG_PINCTRL_PFC_R8A779A0)	+= pfc-r8a779a0.o
 obj-$(CONFIG_PINCTRL_PFC_SH7203)	+= pfc-sh7203.o
 obj-$(CONFIG_PINCTRL_PFC_SH7264)	+= pfc-sh7264.o
 obj-$(CONFIG_PINCTRL_PFC_SH7269)	+= pfc-sh7269.o

drivers/pinctrl/renesas/core.c

@@ -175,13 +175,25 @@ u32 sh_pfc_read(struct sh_pfc *pfc, u32 reg)
 	return sh_pfc_read_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32);
 }
 
-void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data)
+static void sh_pfc_unlock_reg(struct sh_pfc *pfc, u32 reg, u32 data)
 {
-	if (pfc->info->unlock_reg)
-		sh_pfc_write_raw_reg(
-			sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32,
-			~data);
+	u32 unlock;
+
+	if (!pfc->info->unlock_reg)
+		return;
+
+	if (pfc->info->unlock_reg >= 0x80000000UL)
+		unlock = pfc->info->unlock_reg;
+	else
+		/* unlock_reg is a mask */
+		unlock = reg & ~pfc->info->unlock_reg;
 
+	sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, unlock), 32, ~data);
+}
+
+void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data)
+{
+	sh_pfc_unlock_reg(pfc, reg, data);
 	sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32, data);
 }
 
@@ -227,11 +239,7 @@ static void sh_pfc_write_config_reg(struct sh_pfc *pfc,
 	data &= mask;
 	data |= value;
 
-	if (pfc->info->unlock_reg)
-		sh_pfc_write_raw_reg(
-			sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32,
-			~data);
-
+	sh_pfc_unlock_reg(pfc, crp->reg, data);
 	sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data);
 }
 
@@ -638,6 +646,12 @@ static const struct of_device_id sh_pfc_of_table[] = {
 		.data = &r8a77995_pinmux_info,
 	},
 #endif
+#ifdef CONFIG_PINCTRL_PFC_R8A779A0
+	{
+		.compatible = "renesas,pfc-r8a779a0",
+		.data = &r8a779a0_pinmux_info,
+	},
+#endif
 #ifdef CONFIG_PINCTRL_PFC_SH73A0
 	{
 		.compatible = "renesas,pfc-sh73a0",
@@ -1052,6 +1066,10 @@ static void __init sh_pfc_check_driver(const struct platform_driver *pdrv)
 {
 	unsigned int i;
 
+	if (!IS_ENABLED(CONFIG_SUPERH) &&
+	    !of_find_matching_node(NULL, pdrv->driver.of_match_table))
+		return;
+
 	sh_pfc_regs = kcalloc(SH_PFC_MAX_REGS, sizeof(*sh_pfc_regs),
 			      GFP_KERNEL);
 	if (!sh_pfc_regs)

drivers/pinctrl/renesas/pinctrl.c

@@ -634,6 +634,9 @@ static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin,
 	}
 
 	case PIN_CONFIG_POWER_SOURCE: {
+		int idx = sh_pfc_get_pin_index(pfc, _pin);
+		const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
+		unsigned int lower_voltage;
 		u32 pocctrl, val;
 		int bit;
 
@@ -648,7 +651,10 @@ static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin,
 		val = sh_pfc_read(pfc, pocctrl);
 		spin_unlock_irqrestore(&pfc->lock, flags);
 
-		arg = (val & BIT(bit)) ? 3300 : 1800;
+		lower_voltage = (pin->configs & SH_PFC_PIN_VOLTAGE_25_33) ?
+			2500 : 1800;
+
+		arg = (val & BIT(bit)) ? 3300 : lower_voltage;
 		break;
 	}
 
@@ -702,6 +708,9 @@ static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned _pin,
 
 		case PIN_CONFIG_POWER_SOURCE: {
 			unsigned int mV = pinconf_to_config_argument(configs[i]);
+			int idx = sh_pfc_get_pin_index(pfc, _pin);
+			const struct sh_pfc_pin *pin = &pfc->info->pins[idx];
+			unsigned int lower_voltage;
 			u32 pocctrl, val;
 			int bit;
 
@@ -712,7 +721,10 @@ static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned _pin,
 			if (WARN(bit < 0, "invalid pin %#x", _pin))
 				return bit;
 
-			if (mV != 1800 && mV != 3300)
+			lower_voltage = (pin->configs & SH_PFC_PIN_VOLTAGE_25_33) ?
+				2500 : 1800;
+
+			if (mV != lower_voltage && mV != 3300)
 				return -EINVAL;
 
 			spin_lock_irqsave(&pfc->lock, flags);

drivers/pinctrl/renesas/sh_pfc.h

@@ -31,6 +31,15 @@ enum {
 					 SH_PFC_PIN_CFG_PULL_DOWN)
 #define SH_PFC_PIN_CFG_IO_VOLTAGE	(1 << 4)
 #define SH_PFC_PIN_CFG_DRIVE_STRENGTH	(1 << 5)
+
+#define SH_PFC_PIN_VOLTAGE_18_33	(0 << 6)
+#define SH_PFC_PIN_VOLTAGE_25_33	(1 << 6)
+
+#define SH_PFC_PIN_CFG_IO_VOLTAGE_18_33	(SH_PFC_PIN_CFG_IO_VOLTAGE | \
+					 SH_PFC_PIN_VOLTAGE_18_33)
+#define SH_PFC_PIN_CFG_IO_VOLTAGE_25_33	(SH_PFC_PIN_CFG_IO_VOLTAGE | \
+					 SH_PFC_PIN_VOLTAGE_25_33)
+
 #define SH_PFC_PIN_CFG_NO_GPIO		(1 << 31)
 
 struct sh_pfc_pin {
@@ -300,7 +309,7 @@ struct sh_pfc_soc_info {
 	const u16 *pinmux_data;
 	unsigned int pinmux_data_size;
 
-	u32 unlock_reg;
+	u32 unlock_reg;		/* can be literal address or mask */
 };
 
 extern const struct sh_pfc_soc_info emev2_pinmux_info;
@@ -331,6 +340,7 @@ extern const struct sh_pfc_soc_info r8a77970_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77980_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77990_pinmux_info;
 extern const struct sh_pfc_soc_info r8a77995_pinmux_info;
+extern const struct sh_pfc_soc_info r8a779a0_pinmux_info;
 extern const struct sh_pfc_soc_info sh7203_pinmux_info;
 extern const struct sh_pfc_soc_info sh7264_pinmux_info;
 extern const struct sh_pfc_soc_info sh7269_pinmux_info;
@@ -451,9 +461,13 @@ extern const struct sh_pfc_soc_info shx3_pinmux_info;
 	fn(bank, pin, GP_##bank##_##pin, sfx, cfg)
 #define PORT_GP_1(bank, pin, fn, sfx)	PORT_GP_CFG_1(bank, pin, fn, sfx, 0)
 
-#define PORT_GP_CFG_4(bank, fn, sfx, cfg)				\
+#define PORT_GP_CFG_2(bank, fn, sfx, cfg)				\
 	PORT_GP_CFG_1(bank, 0,  fn, sfx, cfg),				\
-	PORT_GP_CFG_1(bank, 1,  fn, sfx, cfg),				\
+	PORT_GP_CFG_1(bank, 1,  fn, sfx, cfg)
+#define PORT_GP_2(bank, fn, sfx)	PORT_GP_CFG_2(bank, fn, sfx, 0)
+
+#define PORT_GP_CFG_4(bank, fn, sfx, cfg)				\
+	PORT_GP_CFG_2(bank, fn, sfx, cfg),				\
 	PORT_GP_CFG_1(bank, 2,  fn, sfx, cfg),				\
 	PORT_GP_CFG_1(bank, 3,  fn, sfx, cfg)
 #define PORT_GP_4(bank, fn, sfx)	PORT_GP_CFG_4(bank, fn, sfx, 0)
@@ -572,9 +586,13 @@ extern const struct sh_pfc_soc_info shx3_pinmux_info;
 	PORT_GP_CFG_1(bank, 29, fn, sfx, cfg)
 #define PORT_GP_30(bank, fn, sfx)	PORT_GP_CFG_30(bank, fn, sfx, 0)
 
-#define PORT_GP_CFG_32(bank, fn, sfx, cfg)				\
+#define PORT_GP_CFG_31(bank, fn, sfx, cfg)				\
 	PORT_GP_CFG_30(bank, fn, sfx, cfg),				\
-	PORT_GP_CFG_1(bank, 30, fn, sfx, cfg),				\
+	PORT_GP_CFG_1(bank, 30, fn, sfx, cfg)
+#define PORT_GP_31(bank, fn, sfx)	PORT_GP_CFG_31(bank, fn, sfx, 0)
+
+#define PORT_GP_CFG_32(bank, fn, sfx, cfg)				\
+	PORT_GP_CFG_31(bank, fn, sfx, cfg),				\
 	PORT_GP_CFG_1(bank, 31, fn, sfx, cfg)
 #define PORT_GP_32(bank, fn, sfx)	PORT_GP_CFG_32(bank, fn, sfx, 0)