pinctrl: renesas: Move drive strength configuration into sh_pfc_soc_operations

The upcoming Renesas R-Car Gen5 uses different mapping of bits in DRV
control register, which is incompatible with existing DRV register bit
mapping. Add .set_drive_strength callback into sh_pfc_soc_operations
and call it from sh_pfc_pinconf_set(), to allow each SoC specific PFC
driver to implement replacement .set_drive_strength. Make the current
sh_pfc_pinconf_set_drive_strength() non-static, rename it with rcar_
prefix, and pass it as .set_drive_strength for existing PFC drivers.
This is a preparatory patch for R-Car Gen5, no functional change.

Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
[Marek: Consistently use .set_drive_strength() and pass exisiting
        sh_pfc_pinconf_set_drive_strength() as its parameter for
	all PFC drivers. Rewrite commit message.]

drivers/pinctrl/renesas/pfc-r8a7790.c

@@ -6186,6 +6186,7 @@ static const struct sh_pfc_soc_operations r8a7790_pfc_ops = {
 	.pin_to_pocctrl = r8a7790_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A7742

drivers/pinctrl/renesas/pfc-r8a7791.c

@@ -6936,6 +6936,7 @@ static const struct sh_pfc_soc_operations r8a7791_pfc_ops = {
 	.pin_to_pocctrl = r8a7791_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A7743

drivers/pinctrl/renesas/pfc-r8a7792.c

@@ -3145,6 +3145,7 @@ static const struct pinmux_bias_reg pinmux_bias_regs[] = {
 static const struct sh_pfc_soc_operations r8a7792_pfc_ops = {
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a7792_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a7794.c

@@ -5887,6 +5887,7 @@ static const struct sh_pfc_soc_operations r8a7794_pfc_ops = {
 	.pin_to_pocctrl = r8a7794_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A7745

drivers/pinctrl/renesas/pfc-r8a77951.c

@@ -6184,6 +6184,7 @@ static const struct sh_pfc_soc_operations r8a77951_pfc_ops = {
 	.pin_to_pocctrl = r8a77951_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A774E1

drivers/pinctrl/renesas/pfc-r8a7796.c

@@ -6137,6 +6137,7 @@ static const struct sh_pfc_soc_operations r8a7796_pfc_ops = {
 	.pin_to_pocctrl = r8a7796_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A774A1

drivers/pinctrl/renesas/pfc-r8a77965.c

@@ -6378,6 +6378,7 @@ static const struct sh_pfc_soc_operations r8a77965_pfc_ops = {
 	.pin_to_pocctrl = r8a77965_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A774B1

drivers/pinctrl/renesas/pfc-r8a77970.c

@@ -2567,6 +2567,7 @@ static const struct sh_pfc_soc_operations r8a77970_pfc_ops = {
 	.pin_to_pocctrl = r8a77970_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a77970_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a77980.c

@@ -3084,6 +3084,7 @@ static const struct sh_pfc_soc_operations r8a77980_pfc_ops = {
 	.pin_to_pocctrl = r8a77980_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a77980_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a77990.c

@@ -5336,6 +5336,7 @@ static const struct sh_pfc_soc_operations r8a77990_pfc_ops = {
 	.pin_to_pocctrl = r8a77990_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 #ifdef CONFIG_PINCTRL_PFC_R8A774C0

drivers/pinctrl/renesas/pfc-r8a77995.c

@@ -3210,6 +3210,7 @@ static const struct sh_pfc_soc_operations r8a77995_pfc_ops = {
 	.pin_to_pocctrl = r8a77995_pin_to_pocctrl,
 	.get_bias = r8a77995_pinmux_get_bias,
 	.set_bias = r8a77995_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a77995_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a779a0.c

@@ -4382,6 +4382,7 @@ static const struct sh_pfc_soc_operations r8a779a0_pfc_ops = {
 	.pin_to_pocctrl = r8a779a0_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a779a0_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a779f0.c

@@ -2094,6 +2094,7 @@ static const struct sh_pfc_soc_operations r8a779f0_pfc_ops = {
 	.pin_to_pocctrl = r8a779f0_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a779f0_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a779g0.c

@@ -4490,6 +4490,7 @@ static const struct sh_pfc_soc_operations r8a779g0_pin_ops = {
 	.pin_to_pocctrl = r8a779g0_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a779g0_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a779h0.c

@@ -4143,6 +4143,7 @@ static const struct sh_pfc_soc_operations r8a779h0_pin_ops = {
 	.pin_to_pocctrl = r8a779h0_pin_to_pocctrl,
 	.get_bias = rcar_pinmux_get_bias,
 	.set_bias = rcar_pinmux_set_bias,
+	.set_drive_strength = rcar_pinconf_set_drive_strength,
 };
 
 const struct sh_pfc_soc_info r8a779h0_pinmux_info = {

drivers/pinctrl/renesas/pfc.c

@@ -743,8 +743,8 @@ sh_pfc_pinconf_find_drive_strength_reg(struct sh_pfc *pfc, unsigned int pin,
 	return NULL;
 }
 
-static int sh_pfc_pinconf_set_drive_strength(struct sh_pfc *pfc,
-					     unsigned int pin, u16 strength)
+int rcar_pinconf_set_drive_strength(struct sh_pfc *pfc,
+				    unsigned int pin, u16 strength)
 {
 	unsigned int offset;
 	unsigned int size;
@@ -831,7 +831,10 @@ static int sh_pfc_pinconf_set(struct sh_pfc_pinctrl *pmx, unsigned _pin,
 		break;
 
 	case PIN_CONFIG_DRIVE_STRENGTH:
-		ret = sh_pfc_pinconf_set_drive_strength(pfc, _pin, arg);
+		if (!pfc->info->ops || !pfc->info->ops->set_drive_strength)
+			return -ENOTSUPP;
+
+		ret = pfc->info->ops->set_drive_strength(pfc, _pin, arg);
 		if (ret < 0)
 			return ret;
 

drivers/pinctrl/renesas/sh_pfc.h

@@ -245,6 +245,8 @@ struct sh_pfc_soc_operations {
 			 unsigned int bias);
 	int (*pin_to_pocctrl)(unsigned int pin, u32 *pocctrl);
 	int (*pin_to_portcr)(unsigned int pin);
+	int (*set_drive_strength)(struct sh_pfc *pfc, unsigned int pin,
+				  u16 strength);
 };
 
 struct sh_pfc_soc_info {
@@ -741,5 +743,7 @@ rcar_pin_to_bias_reg(const struct sh_pfc_soc_info *info, unsigned int pin,
 unsigned int rcar_pinmux_get_bias(struct sh_pfc *pfc, unsigned int pin);
 void rcar_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
 			  unsigned int bias);
+int rcar_pinconf_set_drive_strength(struct sh_pfc *pfc,
+				    unsigned int pin, u16 strength);
 
 #endif /* __SH_PFC_H */