[PATCH v3 2/3] pinctrl: renesas: pinctrl-rzg2l: Add the missing port pins P19 to P28

[Prabhakar <prabhakar.csengg@gmail.com>]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Add the missing port pins P19 to P28 for RZ/Five SoC. These additional
pins provide expanded capabilities and are exclusive to the RZ/Five SoC.

Couple of port pins have different configuration and is not identical for
the complete port so introduced struct rzg2l_variable_pin_cfg to handle
such cases and introduced PIN_CFG_VARIABLE macro. The actual pin config is
then assigned rzg2l_pinctrl_get_variable_pin_cfg().

Add an additional check in rzg2l_gpio_get_gpioint() to only allow GPIO pins
which support interrupt facility.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 215 +++++++++++++++++++++++-
 1 file changed, 213 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 94d072c8a743..083cc63c2c82 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -57,6 +57,8 @@
 #define PIN_CFG_FILCLKSEL		BIT(12)
 #define PIN_CFG_IOLH_C			BIT(13)
 #define PIN_CFG_SOFT_PS			BIT(14)
+#define PIN_CFG_VARIABLE		BIT(15)
+#define PIN_CFG_NOGPIO_INT		BIT(16)
 
 #define RZG2L_MPXED_COMMON_PIN_FUNCS(group) \
 					(PIN_CFG_IOLH_##group | \
@@ -82,6 +84,11 @@
  */
 #define RZG2L_GPIO_PORT_PACK(n, a, f)	(((n) > 0 ? ((u64)(GENMASK_ULL(((n) - 1 + 28), 28))) : 0) | \
 					 ((a) << 20) | (f))
+/*
+ * m indicates the bitmap of supported pins, a is the register index
+ * and f is pin configuration capabilities supported.
+ */
+#define RZG2L_GPIO_PORT_SPARSE_PACK(m, a, f)	(((u64)(m) << 28) | ((a) << 20) | (f))
 #define RZG2L_GPIO_PORT_GET_PINMAP(x)	(((x) & GENMASK_ULL(35, 28)) >> 28)
 #define RZG2L_GPIO_PORT_GET_PINCNT(x)  (hweight8(RZG2L_GPIO_PORT_GET_PINMAP((x))))
 
@@ -185,6 +192,18 @@ struct rzg2l_dedicated_configs {
 	u64 config;
 };
 
+/**
+ * struct rzg2l_variable_pin_cfg - pin data cfg
+ * @cfg: port pin configuration
+ * @port: port number
+ * @pin: port pin
+ */
+struct rzg2l_variable_pin_cfg {
+	u32 cfg;
+	u8 port;
+	u8 pin;
+};
+
 struct rzg2l_pinctrl_data {
 	const char * const *port_pins;
 	const u64 *port_pin_configs;
@@ -193,6 +212,8 @@ struct rzg2l_pinctrl_data {
 	unsigned int n_port_pins;
 	unsigned int n_dedicated_pins;
 	const struct rzg2l_hwcfg *hwcfg;
+	const struct rzg2l_variable_pin_cfg *variable_pin_cfg;
+	unsigned int n_variable_pin_cfg;
 };
 
 /**
@@ -228,6 +249,158 @@ struct rzg2l_pinctrl {
 
 static const u16 available_ps[] = { 1800, 2500, 3300 };
 
+#ifdef CONFIG_RISCV
+static u64 rzg2l_pinctrl_get_variable_pin_cfg(struct rzg2l_pinctrl *pctrl,
+					      u64 pincfg,
+					      unsigned int port,
+					      u8 pin)
+{
+	unsigned int i;
+	u8 pincount;
+	u8 pinmap;
+	u32 off;
+
+	if (!pctrl->data->n_variable_pin_cfg)
+		return pincfg;
+
+	for (i = 0; i < pctrl->data->n_variable_pin_cfg; i++) {
+		if (pctrl->data->variable_pin_cfg[i].port == port &&
+		    pctrl->data->variable_pin_cfg[i].pin == pin)
+			break;
+	}
+	if (i == pctrl->data->n_variable_pin_cfg)
+		return pincfg;
+
+	pinmap = RZG2L_GPIO_PORT_GET_PINMAP(pincfg);
+	pincount = RZG2L_GPIO_PORT_GET_PINCNT(pincfg);
+	off = RZG2L_PIN_CFG_TO_PORT_OFFSET(pincfg);
+
+	if (pinmap == pincount)
+		return RZG2L_GPIO_PORT_PACK(pincount, off, pctrl->data->variable_pin_cfg[i].cfg);
+
+	return RZG2L_GPIO_PORT_SPARSE_PACK(pinmap, off, pctrl->data->variable_pin_cfg[i].cfg);
+}
+
+static const struct rzg2l_variable_pin_cfg r9a07g043f_variable_pin_cfg[] = {
+	{
+		.port = 20,
+		.pin = 0,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 1,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 2,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+		       PIN_CFG_IEN  | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 3,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 4,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 5,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 6,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 20,
+		.pin = 7,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_IEN | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 23,
+		.pin = 1,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT
+	},
+	{
+		.port = 23,
+		.pin = 2,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 23,
+		.pin = 3,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 23,
+		.pin = 4,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 23,
+		.pin = 5,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 0,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 1,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 2,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 3,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 4,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_NOGPIO_INT,
+	},
+	{
+		.port = 24,
+		.pin = 5,
+		.cfg = PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+		       PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+		       PIN_CFG_NOGPIO_INT,
+	},
+};
+#endif
+
 static void rzg2l_pinctrl_set_pfc_mode(struct rzg2l_pinctrl *pctrl,
 				       u8 pin, u8 off, u8 func)
 {
@@ -1320,6 +1493,27 @@ static const u64 r9a07g043_gpio_configs[] = {
 	RZG2L_GPIO_PORT_PACK(2, 0x20, RZG2L_MPXED_PIN_FUNCS),
 	RZG2L_GPIO_PORT_PACK(4, 0x21, RZG2L_MPXED_PIN_FUNCS),
 	RZG2L_GPIO_PORT_PACK(6, 0x22, RZG2L_MPXED_PIN_FUNCS),
+#ifdef CONFIG_RISCV
+	/* Below additional port pins (P19 - P28) are exclusively available on RZ/Five SoC only */
+	RZG2L_GPIO_PORT_SPARSE_PACK(0x2, 0x06, PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+				    PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+				    PIN_CFG_IEN | PIN_CFG_NOGPIO_INT),	/* P19 */
+	RZG2L_GPIO_PORT_PACK(8, 0x07, PIN_CFG_VARIABLE),	/* P20 */
+	RZG2L_GPIO_PORT_SPARSE_PACK(0x2, 0x08, PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+				    PIN_CFG_IEN | PIN_CFG_NOGPIO_INT),	/* P21 */
+	RZG2L_GPIO_PORT_PACK(4, 0x09, PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_PUPD |
+			     PIN_CFG_IEN | PIN_CFG_NOGPIO_INT),	/* P22 */
+	RZG2L_GPIO_PORT_SPARSE_PACK(0x3e, 0x0a, PIN_CFG_VARIABLE),	/* P23 */
+	RZG2L_GPIO_PORT_PACK(6, 0x0b, PIN_CFG_VARIABLE),	/* P24 */
+	RZG2L_GPIO_PORT_SPARSE_PACK(0x2, 0x0c, PIN_CFG_IOLH_B | PIN_CFG_SR | PIN_CFG_FILONOFF |
+				    PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+				    PIN_CFG_NOGPIO_INT),	/* P25 */
+	0x0,	/* Dummy port P26 */
+	0x0,	/* Dummy port P27 */
+	RZG2L_GPIO_PORT_PACK(6, 0x0f, PIN_CFG_IOLH_A | PIN_CFG_SR | PIN_CFG_PUPD |
+			     PIN_CFG_FILONOFF | PIN_CFG_FILNUM | PIN_CFG_FILCLKSEL |
+			     PIN_CFG_NOGPIO_INT),	/* P28 */
+#endif
 };
 
 static const u64 r9a08g045_gpio_configs[] = {
@@ -1478,12 +1672,18 @@ static const struct rzg2l_dedicated_configs rzg3s_dedicated_pins[] = {
 						       PIN_CFG_IO_VMC_SD1)) },
 };
 
-static int rzg2l_gpio_get_gpioint(unsigned int virq, const struct rzg2l_pinctrl_data *data)
+static int rzg2l_gpio_get_gpioint(unsigned int virq, struct rzg2l_pinctrl *pctrl)
 {
+	const struct pinctrl_pin_desc *pin_desc = &pctrl->desc.pins[virq];
+	const struct rzg2l_pinctrl_data *data = pctrl->data;
+	u64 *pin_data = pin_desc->drv_data;
 	unsigned int gpioint;
 	unsigned int i;
 	u32 port, bit;
 
+	if (*pin_data & PIN_CFG_NOGPIO_INT)
+		return -EINVAL;
+
 	port = virq / 8;
 	bit = virq % 8;
 
@@ -1593,7 +1793,7 @@ static int rzg2l_gpio_child_to_parent_hwirq(struct gpio_chip *gc,
 	unsigned long flags;
 	int gpioint, irq;
 
-	gpioint = rzg2l_gpio_get_gpioint(child, pctrl->data);
+	gpioint = rzg2l_gpio_get_gpioint(child, pctrl);
 	if (gpioint < 0)
 		return gpioint;
 
@@ -1778,6 +1978,13 @@ static int rzg2l_pinctrl_register(struct rzg2l_pinctrl *pctrl)
 		if (i && !(i % RZG2L_PINS_PER_PORT))
 			j++;
 		pin_data[i] = pctrl->data->port_pin_configs[j];
+#ifdef CONFIG_RISCV
+		if (pin_data[i] & PIN_CFG_VARIABLE)
+			pin_data[i] = rzg2l_pinctrl_get_variable_pin_cfg(pctrl,
+									 pin_data[i],
+									 j,
+									 i % RZG2L_PINS_PER_PORT);
+#endif
 		pins[i].drv_data = &pin_data[i];
 	}
 
@@ -1925,6 +2132,10 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
 	.n_port_pins = ARRAY_SIZE(r9a07g043_gpio_configs) * RZG2L_PINS_PER_PORT,
 	.n_dedicated_pins = ARRAY_SIZE(rzg2l_dedicated_pins.common),
 	.hwcfg = &rzg2l_hwcfg,
+#ifdef CONFIG_RISCV
+	.variable_pin_cfg = r9a07g043f_variable_pin_cfg,
+	.n_variable_pin_cfg = ARRAY_SIZE(r9a07g043f_variable_pin_cfg),
+#endif
 };
 
 static struct rzg2l_pinctrl_data r9a07g044_data = {
-- 
2.34.1