pinctrl: renesas: Factor out common R-Mobile bias handling

The pin control sub-drivers for SH/R-Mobile SoCs contain almost
identical bias handling.  The only SoC-specific part is the mapping from
pin numbers to PORTnCR registers.

Reduce code duplication by factoring out the bias handling to the common
pinctrl.c code.  Use a callback to handle the pin/register mapping.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20210303132619.3938128-4-geert+renesas@glider.be

drivers/pinctrl/renesas/pfc-r8a73a4.c

@@ -2649,59 +2649,21 @@ static const struct pinmux_irq pinmux_irqs[] = {
 	PINMUX_IRQ(329),	/* IRQ57 */
 };
 
-#define PORTCR_PULMD_OFF (0 << 6)
-#define PORTCR_PULMD_DOWN (2 << 6)
-#define PORTCR_PULMD_UP (3 << 6)
-#define PORTCR_PULMD_MASK (3 << 6)
-
 static const unsigned int r8a73a4_portcr_offsets[] = {
 	0x00000000, 0x00001000, 0x00000000, 0x00001000,
 	0x00001000, 0x00002000, 0x00002000, 0x00002000,
 	0x00002000, 0x00003000, 0x00003000,
 };
 
-static unsigned int r8a73a4_pinmux_get_bias(struct sh_pfc *pfc,
-					    unsigned int pin)
-{
-	void __iomem *addr;
-
-	addr = pfc->windows->virt + r8a73a4_portcr_offsets[pin >> 5] + pin;
-
-	switch (ioread8(addr) & PORTCR_PULMD_MASK) {
-	case PORTCR_PULMD_UP:
-		return PIN_CONFIG_BIAS_PULL_UP;
-	case PORTCR_PULMD_DOWN:
-		return PIN_CONFIG_BIAS_PULL_DOWN;
-	case PORTCR_PULMD_OFF:
-	default:
-		return PIN_CONFIG_BIAS_DISABLE;
-	}
-}
-
-static void r8a73a4_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
-				   unsigned int bias)
+static void __iomem *r8a73a4_pin_to_portcr(struct sh_pfc *pfc, unsigned int pin)
 {
-	void __iomem *addr;
-	u32 value;
-
-	addr = pfc->windows->virt + r8a73a4_portcr_offsets[pin >> 5] + pin;
-	value = ioread8(addr) & ~PORTCR_PULMD_MASK;
-
-	switch (bias) {
-	case PIN_CONFIG_BIAS_PULL_UP:
-		value |= PORTCR_PULMD_UP;
-		break;
-	case PIN_CONFIG_BIAS_PULL_DOWN:
-		value |= PORTCR_PULMD_DOWN;
-		break;
-	}
-
-	iowrite8(value, addr);
+	return pfc->windows->virt + r8a73a4_portcr_offsets[pin >> 5] + pin;
 }
 
 static const struct sh_pfc_soc_operations r8a73a4_pfc_ops = {
-	.get_bias = r8a73a4_pinmux_get_bias,
-	.set_bias = r8a73a4_pinmux_set_bias,
+	.get_bias = rmobile_pinmux_get_bias,
+	.set_bias = rmobile_pinmux_set_bias,
+	.pin_to_portcr = r8a73a4_pin_to_portcr,
 };
 
 const struct sh_pfc_soc_info r8a73a4_pinmux_info = {

drivers/pinctrl/renesas/pfc-r8a7740.c

@@ -3672,11 +3672,6 @@ static const struct pinmux_irq pinmux_irqs[] = {
 	PINMUX_IRQ(41,  167),	/* IRQ31A */
 };
 
-#define PORTnCR_PULMD_OFF	(0 << 6)
-#define PORTnCR_PULMD_DOWN	(2 << 6)
-#define PORTnCR_PULMD_UP	(3 << 6)
-#define PORTnCR_PULMD_MASK	(3 << 6)
-
 struct r8a7740_portcr_group {
 	unsigned int end_pin;
 	unsigned int offset;
@@ -3686,7 +3681,7 @@ static const struct r8a7740_portcr_group r8a7740_portcr_offsets[] = {
 	{ 83, 0x0000 }, { 114, 0x1000 }, { 209, 0x2000 }, { 211, 0x3000 },
 };
 
-static void __iomem *r8a7740_pinmux_portcr(struct sh_pfc *pfc, unsigned int pin)
+static void __iomem *r8a7740_pin_to_portcr(struct sh_pfc *pfc, unsigned int pin)
 {
 	unsigned int i;
 
@@ -3701,43 +3696,10 @@ static void __iomem *r8a7740_pinmux_portcr(struct sh_pfc *pfc, unsigned int pin)
 	return NULL;
 }
 
-static unsigned int r8a7740_pinmux_get_bias(struct sh_pfc *pfc, unsigned int pin)
-{
-	void __iomem *addr = r8a7740_pinmux_portcr(pfc, pin);
-	u32 value = ioread8(addr) & PORTnCR_PULMD_MASK;
-
-	switch (value) {
-	case PORTnCR_PULMD_UP:
-		return PIN_CONFIG_BIAS_PULL_UP;
-	case PORTnCR_PULMD_DOWN:
-		return PIN_CONFIG_BIAS_PULL_DOWN;
-	case PORTnCR_PULMD_OFF:
-	default:
-		return PIN_CONFIG_BIAS_DISABLE;
-	}
-}
-
-static void r8a7740_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
-				   unsigned int bias)
-{
-	void __iomem *addr = r8a7740_pinmux_portcr(pfc, pin);
-	u32 value = ioread8(addr) & ~PORTnCR_PULMD_MASK;
-
-	switch (bias) {
-	case PIN_CONFIG_BIAS_PULL_UP:
-		value |= PORTnCR_PULMD_UP;
-		break;
-	case PIN_CONFIG_BIAS_PULL_DOWN:
-		value |= PORTnCR_PULMD_DOWN;
-		break;
-	}
-
-	iowrite8(value, addr);
-}
-
 static const struct sh_pfc_soc_operations r8a7740_pfc_ops = {
-	.get_bias = r8a7740_pinmux_get_bias,
-	.set_bias = r8a7740_pinmux_set_bias,
+	.get_bias = rmobile_pinmux_get_bias,
+	.set_bias = rmobile_pinmux_set_bias,
+	.pin_to_portcr = r8a7740_pin_to_portcr,
 };
 
 const struct sh_pfc_soc_info r8a7740_pinmux_info = {

drivers/pinctrl/renesas/pfc-sh73a0.c

@@ -13,7 +13,6 @@
 #include <linux/regulator/machine.h>
 #include <linux/slab.h>
 
-#include "core.h"
 #include "sh_pfc.h"
 
 #define CPU_ALL_PORT(fn, pfx, sfx)					\
@@ -4310,50 +4309,14 @@ static const struct regulator_init_data sh73a0_vccq_mc0_init_data = {
  * Pin bias
  */
 
-#define PORTnCR_PULMD_OFF	(0 << 6)
-#define PORTnCR_PULMD_DOWN	(2 << 6)
-#define PORTnCR_PULMD_UP	(3 << 6)
-#define PORTnCR_PULMD_MASK	(3 << 6)
-
 static const unsigned int sh73a0_portcr_offsets[] = {
 	0x00000000, 0x00001000, 0x00001000, 0x00002000, 0x00002000,
 	0x00002000, 0x00002000, 0x00003000, 0x00003000, 0x00002000,
 };
 
-static unsigned int sh73a0_pinmux_get_bias(struct sh_pfc *pfc, unsigned int pin)
+static void __iomem *sh73a0_pin_to_portcr(struct sh_pfc *pfc, unsigned int pin)
 {
-	void __iomem *addr = pfc->windows->virt
-			   + sh73a0_portcr_offsets[pin >> 5] + pin;
-	u32 value = ioread8(addr) & PORTnCR_PULMD_MASK;
-
-	switch (value) {
-	case PORTnCR_PULMD_UP:
-		return PIN_CONFIG_BIAS_PULL_UP;
-	case PORTnCR_PULMD_DOWN:
-		return PIN_CONFIG_BIAS_PULL_DOWN;
-	case PORTnCR_PULMD_OFF:
-	default:
-		return PIN_CONFIG_BIAS_DISABLE;
-	}
-}
-
-static void sh73a0_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
-				   unsigned int bias)
-{
-	void __iomem *addr = pfc->windows->virt
-			   + sh73a0_portcr_offsets[pin >> 5] + pin;
-	u32 value = ioread8(addr) & ~PORTnCR_PULMD_MASK;
-
-	switch (bias) {
-	case PIN_CONFIG_BIAS_PULL_UP:
-		value |= PORTnCR_PULMD_UP;
-		break;
-	case PIN_CONFIG_BIAS_PULL_DOWN:
-		value |= PORTnCR_PULMD_DOWN;
-		break;
-	}
-
-	iowrite8(value, addr);
+	return pfc->windows->virt + sh73a0_portcr_offsets[pin >> 5] + pin;
 }
 
 /* -----------------------------------------------------------------------------
@@ -4383,8 +4346,9 @@ static int sh73a0_pinmux_soc_init(struct sh_pfc *pfc)
 
 static const struct sh_pfc_soc_operations sh73a0_pfc_ops = {
 	.init = sh73a0_pinmux_soc_init,
-	.get_bias = sh73a0_pinmux_get_bias,
-	.set_bias = sh73a0_pinmux_set_bias,
+	.get_bias = rmobile_pinmux_get_bias,
+	.set_bias = rmobile_pinmux_set_bias,
+	.pin_to_portcr = sh73a0_pin_to_portcr,
 };
 
 const struct sh_pfc_soc_info sh73a0_pinmux_info = {

drivers/pinctrl/renesas/pinctrl.c

@@ -10,6 +10,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/init.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
@@ -902,3 +903,42 @@ void rcar_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
 
 	sh_pfc_write(pfc, reg->puen, enable);
 }
+
+#define PORTnCR_PULMD_OFF	(0 << 6)
+#define PORTnCR_PULMD_DOWN	(2 << 6)
+#define PORTnCR_PULMD_UP	(3 << 6)
+#define PORTnCR_PULMD_MASK	(3 << 6)
+
+unsigned int rmobile_pinmux_get_bias(struct sh_pfc *pfc, unsigned int pin)
+{
+	void __iomem *reg = pfc->info->ops->pin_to_portcr(pfc, pin);
+	u32 value = ioread8(reg) & PORTnCR_PULMD_MASK;
+
+	switch (value) {
+	case PORTnCR_PULMD_UP:
+		return PIN_CONFIG_BIAS_PULL_UP;
+	case PORTnCR_PULMD_DOWN:
+		return PIN_CONFIG_BIAS_PULL_DOWN;
+	case PORTnCR_PULMD_OFF:
+	default:
+		return PIN_CONFIG_BIAS_DISABLE;
+	}
+}
+
+void rmobile_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
+			     unsigned int bias)
+{
+	void __iomem *reg = pfc->info->ops->pin_to_portcr(pfc, pin);
+	u32 value = ioread8(reg) & ~PORTnCR_PULMD_MASK;
+
+	switch (bias) {
+	case PIN_CONFIG_BIAS_PULL_UP:
+		value |= PORTnCR_PULMD_UP;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		value |= PORTnCR_PULMD_DOWN;
+		break;
+	}
+
+	iowrite8(value, reg);
+}

drivers/pinctrl/renesas/sh_pfc.h

@@ -273,6 +273,7 @@ struct sh_pfc_soc_operations {
 	void (*set_bias)(struct sh_pfc *pfc, unsigned int pin,
 			 unsigned int bias);
 	int (*pin_to_pocctrl)(struct sh_pfc *pfc, unsigned int pin, u32 *pocctrl);
+	void __iomem * (*pin_to_portcr)(struct sh_pfc *pfc, unsigned int pin);
 };
 
 struct sh_pfc_soc_info {
@@ -780,4 +781,8 @@ 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);
 
+unsigned int rmobile_pinmux_get_bias(struct sh_pfc *pfc, unsigned int pin);
+void rmobile_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
+			     unsigned int bias);
+
 #endif /* __SH_PFC_H */