[PATCH 4/7] pinctrl: samsung: Add GPFx support of Exynos5433

[Chanwoo Choi <cw00.choi@samsung.com>]

From: Joonyoung Shim <jy0922.shim@samsung.com>

This patch add the support of GPFx pin of Exynos5433 SoC. Exynos5433 has
different memory map of GPFx from previous Exynos SoC. Exynos GPIO has
following register to control gpio funciton. Usually, all registers of GPIO
are included in same domain.
- CON / DAT / PUD / DRV / CONPDN / PUDPDN
- EINT_CON/ EINT_FLTCON0, EINT_FLTCON1 / EINT_MASK / EINT_PEND

But, GPFx are included in two domain as following. So, this patch supports
the GPFx pin which handle the on separate two domains.
- ALIVE domain : CON / DAT / PUD / DRV / CONPDN / PUDPDN
- IMEM domain  : EINT_CON/ EINT_FLTCON0, EINT_FLTCON1 / EINT_MASK / EINT_PEND

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 .../bindings/pinctrl/samsung-pinctrl.txt           |  1 +
 drivers/pinctrl/samsung/pinctrl-exynos.c           |  5 +++
 drivers/pinctrl/samsung/pinctrl-exynos.h           | 11 ++++++
 drivers/pinctrl/samsung/pinctrl-samsung.c          | 43 ++++++++++++++++++----
 drivers/pinctrl/samsung/pinctrl-samsung.h          |  5 +++
 5 files changed, 57 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
index 6db16b90873a..807fba1f829f 100644
--- a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
@@ -19,6 +19,7 @@ Required Properties:
   - "samsung,exynos5260-pinctrl": for Exynos5260 compatible pin-controller.
   - "samsung,exynos5410-pinctrl": for Exynos5410 compatible pin-controller.
   - "samsung,exynos5420-pinctrl": for Exynos5420 compatible pin-controller.
+  - "samsung,exynos5433-pinctrl": for Exynos5433 compatible pin-controller.
   - "samsung,exynos7-pinctrl": for Exynos7 compatible pin-controller.
 
 - reg: Base address of the pin controller hardware module and length of
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 051b5bf701a8..4f95983e0cdd 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -1350,6 +1350,11 @@ static const struct samsung_pin_bank_data exynos5433_pin_banks0[] = {
 	EXYNOS_PIN_BANK_EINTW(8, 0x020, "gpa1", 0x04),
 	EXYNOS_PIN_BANK_EINTW(8, 0x040, "gpa2", 0x08),
 	EXYNOS_PIN_BANK_EINTW(8, 0x060, "gpa3", 0x0c),
+	EXYNOS_PIN_BANK_EINTW_EXT(8, 0x020, "gpf1", 0x1004),
+	EXYNOS_PIN_BANK_EINTW_EXT(4, 0x040, "gpf2", 0x1008),
+	EXYNOS_PIN_BANK_EINTW_EXT(4, 0x060, "gpf3", 0x100c),
+	EXYNOS_PIN_BANK_EINTW_EXT(8, 0x080, "gpf4", 0x1010),
+	EXYNOS_PIN_BANK_EINTW_EXT(8, 0x0a0, "gpf5", 0x1014),
 };
 
 /* pin banks of exynos5433 pin-controller - AUD */
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.h b/drivers/pinctrl/samsung/pinctrl-exynos.h
index 0f0f7cedb2dc..4b737b6c434d 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.h
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.h
@@ -79,6 +79,17 @@
 		.name		= id			\
 	}
 
+#define EXYNOS_PIN_BANK_EINTW_EXT(pins, reg, id, offs)	\
+	{						\
+		.type		= &bank_type_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_offset	= offs,			\
+		.eint_ext	= true,			\
+		.name		= id			\
+	}
+
 /**
  * struct exynos_weint_data: irq specific data for all the wakeup interrupts
  * generated by the external wakeup interrupt controller.
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index 513fe6b23248..57e22085c2db 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -338,6 +338,7 @@ static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
 			struct samsung_pin_bank **bank)
 {
 	struct samsung_pin_bank *b;
+	void __iomem *virt_base = drvdata->virt_base;
 
 	b = drvdata->pin_banks;
 
@@ -345,7 +346,10 @@ static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
 			((b->pin_base + b->nr_pins - 1) < pin))
 		b++;
 
-	*reg = drvdata->virt_base + b->pctl_offset;
+	if (b->eint_ext)
+		virt_base = drvdata->ext_base;
+
+	*reg = virt_base + b->pctl_offset;
 	*offset = pin - b->pin_base;
 	if (bank)
 		*bank = b;
@@ -523,10 +527,12 @@ static void samsung_gpio_set_value(struct gpio_chip *gc,
 {
 	struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 	const struct samsung_pin_bank_type *type = bank->type;
+	void __iomem *virt_base = bank->eint_ext ?
+		bank->drvdata->ext_base : bank->drvdata->virt_base;
 	void __iomem *reg;
 	u32 data;
 
-	reg = bank->drvdata->virt_base + bank->pctl_offset;
+	reg = virt_base + bank->pctl_offset;
 
 	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
 	data &= ~(1 << offset);
@@ -553,8 +559,10 @@ static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
 	u32 data;
 	struct samsung_pin_bank *bank = gpiochip_get_data(gc);
 	const struct samsung_pin_bank_type *type = bank->type;
+	void __iomem *virt_base = bank->eint_ext ?
+		bank->drvdata->ext_base : bank->drvdata->virt_base;
 
-	reg = bank->drvdata->virt_base + bank->pctl_offset;
+	reg = virt_base + bank->pctl_offset;
 
 	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
 	data >>= offset;
@@ -574,6 +582,7 @@ static int samsung_gpio_set_direction(struct gpio_chip *gc,
 	const struct samsung_pin_bank_type *type;
 	struct samsung_pin_bank *bank;
 	struct samsung_pinctrl_drv_data *drvdata;
+	void __iomem *virt_base;
 	void __iomem *reg;
 	u32 data, mask, shift;
 
@@ -581,7 +590,8 @@ static int samsung_gpio_set_direction(struct gpio_chip *gc,
 	type = bank->type;
 	drvdata = bank->drvdata;
 
-	reg = drvdata->virt_base + bank->pctl_offset +
+	virt_base = bank->eint_ext ? drvdata->ext_base : drvdata->virt_base;
+	reg = virt_base + bank->pctl_offset +
 					type->reg_offset[PINCFG_TYPE_FUNC];
 
 	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
@@ -1007,6 +1017,7 @@ samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
 		bank->eint_type = bdata->eint_type;
 		bank->eint_mask = bdata->eint_mask;
 		bank->eint_offset = bdata->eint_offset;
+		bank->eint_ext = bdata->eint_ext;
 		bank->name = bdata->name;
 
 		spin_lock_init(&bank->slock);
@@ -1065,6 +1076,14 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(drvdata->virt_base))
 		return PTR_ERR(drvdata->virt_base);
 
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		drvdata->ext_base =
+			devm_ioremap(dev, res->start, resource_size(res));
+		if (!drvdata->ext_base)
+			return -ENXIO;
+	}
+
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (res)
 		drvdata->irq = res->start;
@@ -1102,16 +1121,20 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
 static void samsung_pinctrl_suspend_dev(
 	struct samsung_pinctrl_drv_data *drvdata)
 {
-	void __iomem *virt_base = drvdata->virt_base;
+	void __iomem *virt_base;
 	int i;
 
 	for (i = 0; i < drvdata->nr_banks; i++) {
 		struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
-		void __iomem *reg = virt_base + bank->pctl_offset;
+		void __iomem *reg;
 		const u8 *offs = bank->type->reg_offset;
 		const u8 *widths = bank->type->fld_width;
 		enum pincfg_type type;
 
+		virt_base = bank->eint_ext ?
+			drvdata->ext_base : drvdata->virt_base;
+		reg = virt_base + bank->pctl_offset;
+
 		/* Registers without a powerdown config aren't lost */
 		if (!widths[PINCFG_TYPE_CON_PDN])
 			continue;
@@ -1148,7 +1171,7 @@ static void samsung_pinctrl_suspend_dev(
  */
 static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
 {
-	void __iomem *virt_base = drvdata->virt_base;
+	void __iomem *virt_base;
 	int i;
 
 	if (drvdata->resume)
@@ -1156,11 +1179,15 @@ static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
 
 	for (i = 0; i < drvdata->nr_banks; i++) {
 		struct samsung_pin_bank *bank = &drvdata->pin_banks[i];
-		void __iomem *reg = virt_base + bank->pctl_offset;
+		void __iomem *reg;
 		const u8 *offs = bank->type->reg_offset;
 		const u8 *widths = bank->type->fld_width;
 		enum pincfg_type type;
 
+		virt_base = bank->eint_ext ?
+			drvdata->ext_base : drvdata->virt_base;
+		reg = virt_base + bank->pctl_offset;
+
 		/* Registers without a powerdown config aren't lost */
 		if (!widths[PINCFG_TYPE_CON_PDN])
 			continue;
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
index cd31bfaf62cb..3005135f4565 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.h
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
@@ -131,6 +131,7 @@ struct samsung_pin_bank_data {
 	enum eint_type	eint_type;
 	u32		eint_mask;
 	u32		eint_offset;
+	bool		eint_ext;
 	const char	*name;
 };
 
@@ -163,6 +164,7 @@ struct samsung_pin_bank {
 	enum eint_type	eint_type;
 	u32		eint_mask;
 	u32		eint_offset;
+	bool		eint_ext;
 	const char	*name;
 
 	u32		pin_base;
@@ -201,6 +203,8 @@ struct samsung_pin_ctrl {
  * struct samsung_pinctrl_drv_data: wrapper for holding driver data together.
  * @node: global list node
  * @virt_base: register base address of the controller.
+ * @ext_base: external register base address of the controller.
+ * @ext_base: external register base address of the controller.
  * @dev: device instance representing the controller.
  * @irq: interrpt number used by the controller to notify gpio interrupts.
  * @ctrl: pin controller instance managed by the driver.
@@ -216,6 +220,7 @@ struct samsung_pin_ctrl {
 struct samsung_pinctrl_drv_data {
 	struct list_head		node;
 	void __iomem			*virt_base;
+	void __iomem			*ext_base;
 	struct device			*dev;
 	int				irq;
 
-- 
1.9.1