Merge tag 'samsung-pinctrl-6.17' of https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung into devel

Samsung pinctrl drivers changes for v6.17

Add support for programming wake up for Google GS101 SoC pin
controllers, so the SoC can be properly woken up from low power states.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

4 files changed, 98 insertions, 16 deletions

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c b/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
index 9fd894729a7b..5fe7c4b9f7bd 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
@@ -1405,7 +1405,7 @@ static const struct samsung_pin_bank_data exynosautov920_pin_banks7[] = {
 	EXYNOSV920_PIN_BANK_EINTG(8, 0x8000, "gpg1",  0x18, 0x24, 0x28),
 };
 
-static const struct samsung_retention_data exynosautov920_retention_data __initconst = {
+static const struct samsung_retention_data no_retention_data __initconst = {
 	.regs	 = NULL,
 	.nr_regs = 0,
 	.value	 = 0,
@@ -1421,7 +1421,7 @@ static const struct samsung_pin_ctrl exynosautov920_pin_ctrl[] = {
 		.eint_wkup_init	= exynos_eint_wkup_init,
 		.suspend	= exynosautov920_pinctrl_suspend,
 		.resume		= exynosautov920_pinctrl_resume,
-		.retention_data	= &exynosautov920_retention_data,
+		.retention_data	= &no_retention_data,
 	}, {
 		/* pin-controller instance 1 AUD data */
 		.pin_banks	= exynosautov920_pin_banks1,
@@ -1764,6 +1764,7 @@ static const struct samsung_pin_ctrl gs101_pin_ctrl[] __initconst = {
 		.eint_wkup_init = exynos_eint_wkup_init,
 		.suspend	= gs101_pinctrl_suspend,
 		.resume		= gs101_pinctrl_resume,
+		.retention_data = &no_retention_data,
 	}, {
 		/* pin banks of gs101 pin-controller (FAR_ALIVE) */
 		.pin_banks	= gs101_pin_far_alive,
@@ -1771,6 +1772,7 @@ static const struct samsung_pin_ctrl gs101_pin_ctrl[] __initconst = {
 		.eint_wkup_init = exynos_eint_wkup_init,
 		.suspend	= gs101_pinctrl_suspend,
 		.resume		= gs101_pinctrl_resume,
+		.retention_data = &no_retention_data,
 	}, {
 		/* pin banks of gs101 pin-controller (GSACORE) */
 		.pin_banks	= gs101_pin_gsacore,
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index f3e1c11abe55..81fe0b08a9af 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -32,18 +32,24 @@
 #include "pinctrl-samsung.h"
 #include "pinctrl-exynos.h"
 
+#define MAX_WAKEUP_REG 3
+
 struct exynos_irq_chip {
 	struct irq_chip chip;
 
 	u32 eint_con;
 	u32 eint_mask;
 	u32 eint_pend;
-	u32 *eint_wake_mask_value;
+	u32 eint_num_wakeup_reg;
 	u32 eint_wake_mask_reg;
 	void (*set_eint_wakeup_mask)(struct samsung_pinctrl_drv_data *drvdata,
 				     struct exynos_irq_chip *irq_chip);
 };
 
+static u32 eint_wake_mask_values[MAX_WAKEUP_REG] = { EXYNOS_EINT_WAKEUP_MASK_DISABLED,
+						     EXYNOS_EINT_WAKEUP_MASK_DISABLED,
+						     EXYNOS_EINT_WAKEUP_MASK_DISABLED};
+
 static inline struct exynos_irq_chip *to_exynos_irq_chip(struct irq_chip *chip)
 {
 	return container_of(chip, struct exynos_irq_chip, chip);
@@ -307,7 +313,7 @@ static const struct exynos_irq_chip exynos_gpio_irq_chip __initconst = {
 	.eint_con = EXYNOS_GPIO_ECON_OFFSET,
 	.eint_mask = EXYNOS_GPIO_EMASK_OFFSET,
 	.eint_pend = EXYNOS_GPIO_EPEND_OFFSET,
-	/* eint_wake_mask_value not used */
+	/* eint_wake_mask_values not used */
 };
 
 static int exynos_eint_irq_map(struct irq_domain *h, unsigned int virq,
@@ -467,10 +473,55 @@ err_domains:
 	return ret;
 }
 
+#define BITS_PER_U32 32
+static int gs101_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	u32 bit, wakeup_reg, shift;
+
+	bit = bank->eint_num + irqd->hwirq;
+	wakeup_reg = bit / BITS_PER_U32;
+	shift = bit - (wakeup_reg * BITS_PER_U32);
+
+	if (!on)
+		eint_wake_mask_values[wakeup_reg] |= BIT_U32(shift);
+	else
+		eint_wake_mask_values[wakeup_reg] &= ~BIT_U32(shift);
+
+	dev_info(d->dev, "wake %s for irq %d\n", str_enabled_disabled(on),
+		 irqd->irq);
+
+	return 0;
+}
+
+static void
+gs101_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata,
+				   struct exynos_irq_chip *irq_chip)
+{
+	struct regmap *pmu_regs;
+
+	if (!drvdata->retention_ctrl || !drvdata->retention_ctrl->priv) {
+		dev_warn(drvdata->dev,
+			 "No PMU syscon available. Wake-up mask will not be set.\n");
+		return;
+	}
+
+	pmu_regs = drvdata->retention_ctrl->priv;
+
+	dev_dbg(drvdata->dev, "Setting external wakeup interrupt mask:\n");
+
+	for (int i = 0; i < irq_chip->eint_num_wakeup_reg; i++) {
+		dev_dbg(drvdata->dev, "\tWAKEUP_MASK%d[0x%X] value[0x%X]\n",
+			i, irq_chip->eint_wake_mask_reg + i * 4,
+			eint_wake_mask_values[i]);
+		regmap_write(pmu_regs, irq_chip->eint_wake_mask_reg + i * 4,
+			     eint_wake_mask_values[i]);
+	}
+}
+
 static int exynos_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on)
 {
-	struct irq_chip *chip = irq_data_get_irq_chip(irqd);
-	struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
 	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
 	unsigned long bit = 1UL << (2 * bank->eint_offset + irqd->hwirq);
 
@@ -478,9 +529,9 @@ static int exynos_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on)
 		irqd->irq, bank->name, irqd->hwirq);
 
 	if (!on)
-		*our_chip->eint_wake_mask_value |= bit;
+		eint_wake_mask_values[0] |= bit;
 	else
-		*our_chip->eint_wake_mask_value &= ~bit;
+		eint_wake_mask_values[0] &= ~bit;
 
 	return 0;
 }
@@ -500,10 +551,10 @@ exynos_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata,
 	pmu_regs = drvdata->retention_ctrl->priv;
 	dev_info(drvdata->dev,
 		 "Setting external wakeup interrupt mask: 0x%x\n",
-		 *irq_chip->eint_wake_mask_value);
+		 eint_wake_mask_values[0]);
 
 	regmap_write(pmu_regs, irq_chip->eint_wake_mask_reg,
-		     *irq_chip->eint_wake_mask_value);
+		     eint_wake_mask_values[0]);
 }
 
 static void
@@ -522,11 +573,10 @@ s5pv210_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata,
 
 	clk_base = (void __iomem *) drvdata->retention_ctrl->priv;
 
-	__raw_writel(*irq_chip->eint_wake_mask_value,
+	__raw_writel(eint_wake_mask_values[0],
 		     clk_base + irq_chip->eint_wake_mask_reg);
 }
 
-static u32 eint_wake_mask_value = EXYNOS_EINT_WAKEUP_MASK_DISABLED;
 /*
  * irq_chip for wakeup interrupts
  */
@@ -544,7 +594,7 @@ static const struct exynos_irq_chip s5pv210_wkup_irq_chip __initconst = {
 	.eint_con = EXYNOS_WKUP_ECON_OFFSET,
 	.eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
 	.eint_pend = EXYNOS_WKUP_EPEND_OFFSET,
-	.eint_wake_mask_value = &eint_wake_mask_value,
+	.eint_num_wakeup_reg = 1,
 	/* Only differences with exynos4210_wkup_irq_chip: */
 	.eint_wake_mask_reg = S5PV210_EINT_WAKEUP_MASK,
 	.set_eint_wakeup_mask = s5pv210_pinctrl_set_eint_wakeup_mask,
@@ -564,7 +614,7 @@ static const struct exynos_irq_chip exynos4210_wkup_irq_chip __initconst = {
 	.eint_con = EXYNOS_WKUP_ECON_OFFSET,
 	.eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
 	.eint_pend = EXYNOS_WKUP_EPEND_OFFSET,
-	.eint_wake_mask_value = &eint_wake_mask_value,
+	.eint_num_wakeup_reg = 1,
 	.eint_wake_mask_reg = EXYNOS_EINT_WAKEUP_MASK,
 	.set_eint_wakeup_mask = exynos_pinctrl_set_eint_wakeup_mask,
 };
@@ -583,7 +633,7 @@ static const struct exynos_irq_chip exynos7_wkup_irq_chip __initconst = {
 	.eint_con = EXYNOS7_WKUP_ECON_OFFSET,
 	.eint_mask = EXYNOS7_WKUP_EMASK_OFFSET,
 	.eint_pend = EXYNOS7_WKUP_EPEND_OFFSET,
-	.eint_wake_mask_value = &eint_wake_mask_value,
+	.eint_num_wakeup_reg = 1,
 	.eint_wake_mask_reg = EXYNOS5433_EINT_WAKEUP_MASK,
 	.set_eint_wakeup_mask = exynos_pinctrl_set_eint_wakeup_mask,
 };
@@ -599,13 +649,34 @@ static const struct exynos_irq_chip exynosautov920_wkup_irq_chip __initconst = {
 		.irq_request_resources = exynos_irq_request_resources,
 		.irq_release_resources = exynos_irq_release_resources,
 	},
-	.eint_wake_mask_value = &eint_wake_mask_value,
+	.eint_num_wakeup_reg = 1,
 	.eint_wake_mask_reg = EXYNOS5433_EINT_WAKEUP_MASK,
 	.set_eint_wakeup_mask = exynos_pinctrl_set_eint_wakeup_mask,
 };
 
+static const struct exynos_irq_chip gs101_wkup_irq_chip __initconst = {
+	.chip = {
+		.name = "gs101_wkup_irq_chip",
+		.irq_unmask = exynos_irq_unmask,
+		.irq_mask = exynos_irq_mask,
+		.irq_ack = exynos_irq_ack,
+		.irq_set_type = exynos_irq_set_type,
+		.irq_set_wake = gs101_wkup_irq_set_wake,
+		.irq_request_resources = exynos_irq_request_resources,
+		.irq_release_resources = exynos_irq_release_resources,
+	},
+	.eint_con = EXYNOS7_WKUP_ECON_OFFSET,
+	.eint_mask = EXYNOS7_WKUP_EMASK_OFFSET,
+	.eint_pend = EXYNOS7_WKUP_EPEND_OFFSET,
+	.eint_num_wakeup_reg = 3,
+	.eint_wake_mask_reg = GS101_EINT_WAKEUP_MASK,
+	.set_eint_wakeup_mask = gs101_pinctrl_set_eint_wakeup_mask,
+};
+
 /* list of external wakeup controllers supported */
 static const struct of_device_id exynos_wkup_irq_ids[] = {
+	{ .compatible = "google,gs101-wakeup-eint",
+			.data = &gs101_wkup_irq_chip },
 	{ .compatible = "samsung,s5pv210-wakeup-eint",
 			.data = &s5pv210_wkup_irq_chip },
 	{ .compatible = "samsung,exynos4210-wakeup-eint",
@@ -688,6 +759,7 @@ out:
 	chained_irq_exit(chip, desc);
 }
 
+static int eint_num;
 /*
  * exynos_eint_wkup_init() - setup handling of external wakeup interrupts.
  * @d: driver data of samsung pinctrl driver.
@@ -736,6 +808,9 @@ __init int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 			return -ENXIO;
 		}
 
+		bank->eint_num = eint_num;
+		eint_num = eint_num + bank->nr_pins;
+
 		if (!fwnode_property_present(bank->fwnode, "interrupts")) {
 			bank->eint_type = EINT_TYPE_WKUP_MUX;
 			++muxed_banks;
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
index fcc57c244d16..1cabcbe1401a 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.h
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
@@ -141,6 +141,7 @@ struct samsung_pin_bank_type {
  * @eint_type: type of the external interrupt supported by the bank.
  * @eint_mask: bit mask of pins which support EINT function.
  * @eint_offset: SoC-specific EINT register or interrupt offset of bank.
+ * @eint_num: total number of eint pins.
  * @eint_con_offset: ExynosAuto SoC-specific EINT control register offset of bank.
  * @eint_mask_offset: ExynosAuto SoC-specific EINT mask register offset of bank.
  * @eint_pend_offset: ExynosAuto SoC-specific EINT pend register offset of bank.
@@ -156,6 +157,7 @@ struct samsung_pin_bank_data {
 	enum eint_type	eint_type;
 	u32		eint_mask;
 	u32		eint_offset;
+	u32		eint_num;
 	u32		eint_con_offset;
 	u32		eint_mask_offset;
 	u32		eint_pend_offset;
@@ -174,6 +176,7 @@ struct samsung_pin_bank_data {
  * @eint_type: type of the external interrupt supported by the bank.
  * @eint_mask: bit mask of pins which support EINT function.
  * @eint_offset: SoC-specific EINT register or interrupt offset of bank.
+ * @eint_num: total number of eint pins.
  * @eint_con_offset: ExynosAuto SoC-specific EINT register or interrupt offset of bank.
  * @eint_mask_offset: ExynosAuto SoC-specific EINT mask register offset of bank.
  * @eint_pend_offset: ExynosAuto SoC-specific EINT pend register offset of bank.
@@ -201,6 +204,7 @@ struct samsung_pin_bank {
 	enum eint_type	eint_type;
 	u32		eint_mask;
 	u32		eint_offset;
+	u32		eint_num;
 	u32		eint_con_offset;
 	u32		eint_mask_offset;
 	u32		eint_pend_offset;
diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h
index 1a2c0e0838f9..938c6db235fb 100644
--- a/include/linux/soc/samsung/exynos-regs-pmu.h
+++ b/include/linux/soc/samsung/exynos-regs-pmu.h
@@ -669,6 +669,7 @@
 #define GS101_CPU_INFORM(cpu)	\
 			(GS101_CPU0_INFORM + (cpu*4))
 #define GS101_SYSTEM_CONFIGURATION				(0x3A00)
+#define GS101_EINT_WAKEUP_MASK					(0x3A80)
 #define GS101_PHY_CTRL_USB20					(0x3EB0)
 #define GS101_PHY_CTRL_USBDP					(0x3EB4)