1 files changed, 81 insertions, 86 deletions

diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
index d3f3a69d4907..aa8586d8a787 100644
--- a/drivers/gpio/gpio-vf610.c
+++ b/drivers/gpio/gpio-vf610.c
@@ -10,26 +10,26 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/irq.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
 
 #define VF610_GPIO_PER_PORT		32
 
 struct fsl_gpio_soc_data {
 	/* SoCs has a Port Data Direction Register (PDDR) */
 	bool have_paddr;
+	bool have_dual_base;
 };
 
 struct vf610_gpio_port {
-	struct gpio_chip gc;
+	struct gpio_generic_chip chip;
 	void __iomem *base;
 	void __iomem *gpio_base;
 	const struct fsl_gpio_soc_data *sdata;
@@ -61,13 +61,26 @@ struct vf610_gpio_port {
 #define PORT_INT_EITHER_EDGE	0xb
 #define PORT_INT_LOGIC_ONE	0xc
 
+#define IMX8ULP_GPIO_BASE_OFF	0x40
+#define IMX8ULP_BASE_OFF	0x80
+
+static const struct fsl_gpio_soc_data vf610_data = {
+	.have_dual_base = true,
+};
+
 static const struct fsl_gpio_soc_data imx_data = {
 	.have_paddr = true,
+	.have_dual_base = true,
+};
+
+static const struct fsl_gpio_soc_data imx8ulp_data = {
+	.have_paddr = true,
 };
 
 static const struct of_device_id vf610_gpio_dt_ids[] = {
-	{ .compatible = "fsl,vf610-gpio",	.data = NULL, },
+	{ .compatible = "fsl,vf610-gpio",	.data = &vf610_data },
 	{ .compatible = "fsl,imx7ulp-gpio",	.data = &imx_data, },
+	{ .compatible = "fsl,imx8ulp-gpio",	.data = &imx8ulp_data, },
 	{ /* sentinel */ }
 };
 
@@ -81,63 +94,6 @@ static inline u32 vf610_gpio_readl(void __iomem *reg)
 	return readl_relaxed(reg);
 }
 
-static int vf610_gpio_get(struct gpio_chip *gc, unsigned int gpio)
-{
-	struct vf610_gpio_port *port = gpiochip_get_data(gc);
-	unsigned long mask = BIT(gpio);
-	unsigned long offset = GPIO_PDIR;
-
-	if (port->sdata && port->sdata->have_paddr) {
-		mask &= vf610_gpio_readl(port->gpio_base + GPIO_PDDR);
-		if (mask)
-			offset = GPIO_PDOR;
-	}
-
-	return !!(vf610_gpio_readl(port->gpio_base + offset) & BIT(gpio));
-}
-
-static void vf610_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	struct vf610_gpio_port *port = gpiochip_get_data(gc);
-	unsigned long mask = BIT(gpio);
-	unsigned long offset = val ? GPIO_PSOR : GPIO_PCOR;
-
-	vf610_gpio_writel(mask, port->gpio_base + offset);
-}
-
-static int vf610_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
-{
-	struct vf610_gpio_port *port = gpiochip_get_data(chip);
-	unsigned long mask = BIT(gpio);
-	u32 val;
-
-	if (port->sdata && port->sdata->have_paddr) {
-		val = vf610_gpio_readl(port->gpio_base + GPIO_PDDR);
-		val &= ~mask;
-		vf610_gpio_writel(val, port->gpio_base + GPIO_PDDR);
-	}
-
-	return pinctrl_gpio_direction_input(chip->base + gpio);
-}
-
-static int vf610_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
-				       int value)
-{
-	struct vf610_gpio_port *port = gpiochip_get_data(chip);
-	unsigned long mask = BIT(gpio);
-	u32 val;
-
-	if (port->sdata && port->sdata->have_paddr) {
-		val = vf610_gpio_readl(port->gpio_base + GPIO_PDDR);
-		val |= mask;
-		vf610_gpio_writel(val, port->gpio_base + GPIO_PDDR);
-	}
-
-	vf610_gpio_set(chip, gpio, value);
-
-	return pinctrl_gpio_direction_output(chip->base + gpio);
-}
-
 static void vf610_gpio_irq_handler(struct irq_desc *desc)
 {
 	struct vf610_gpio_port *port =
@@ -153,7 +109,7 @@ static void vf610_gpio_irq_handler(struct irq_desc *desc)
 	for_each_set_bit(pin, &irq_isfr, VF610_GPIO_PER_PORT) {
 		vf610_gpio_writel(BIT(pin), port->base + PORT_ISFR);
 
-		generic_handle_domain_irq(port->gc.irq.domain, pin);
+		generic_handle_domain_irq(port->chip.gc.irq.domain, pin);
 	}
 
 	chained_irq_exit(chip, desc);
@@ -247,7 +203,8 @@ static const struct irq_chip vf610_irqchip = {
 	.irq_unmask = vf610_gpio_irq_unmask,
 	.irq_set_type = vf610_gpio_irq_set_type,
 	.irq_set_wake = vf610_gpio_irq_set_wake,
-	.flags = IRQCHIP_IMMUTABLE,
+	.flags = IRQCHIP_IMMUTABLE | IRQCHIP_MASK_ON_SUSPEND
+			| IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND,
 	GPIOCHIP_IRQ_RESOURCE_HELPERS,
 };
 
@@ -258,26 +215,49 @@ static void vf610_gpio_disable_clk(void *data)
 
 static int vf610_gpio_probe(struct platform_device *pdev)
 {
+	struct gpio_generic_chip_config config;
 	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
 	struct vf610_gpio_port *port;
 	struct gpio_chip *gc;
 	struct gpio_irq_chip *girq;
+	unsigned long flags;
 	int i;
 	int ret;
+	bool dual_base;
 
 	port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
 	if (!port)
 		return -ENOMEM;
 
-	port->sdata = of_device_get_match_data(dev);
-	port->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(port->base))
-		return PTR_ERR(port->base);
-
-	port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
-	if (IS_ERR(port->gpio_base))
-		return PTR_ERR(port->gpio_base);
+	port->sdata = device_get_match_data(dev);
+
+	dual_base = port->sdata->have_dual_base;
+
+	/*
+	 * Handle legacy compatible combinations which used two reg values
+	 * for the i.MX8ULP and i.MX93.
+	 */
+	if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
+	    (device_is_compatible(dev, "fsl,imx93-gpio") ||
+	    (device_is_compatible(dev, "fsl,imx8ulp-gpio"))))
+		dual_base = true;
+
+	if (dual_base) {
+		port->base = devm_platform_ioremap_resource(pdev, 0);
+		if (IS_ERR(port->base))
+			return PTR_ERR(port->base);
+
+		port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
+		if (IS_ERR(port->gpio_base))
+			return PTR_ERR(port->gpio_base);
+	} else {
+		port->base = devm_platform_ioremap_resource(pdev, 0);
+		if (IS_ERR(port->base))
+			return PTR_ERR(port->base);
+
+		port->gpio_base = port->base + IMX8ULP_GPIO_BASE_OFF;
+		port->base = port->base + IMX8ULP_BASE_OFF;
+	}
 
 	port->irq = platform_get_irq(pdev, 0);
 	if (port->irq < 0)
@@ -315,18 +295,31 @@ static int vf610_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	gc = &port->gc;
-	gc->parent = dev;
+	gc = &port->chip.gc;
+	flags = GPIO_GENERIC_PINCTRL_BACKEND;
+	/*
+	 * We only read the output register for current value on output
+	 * lines if the direction register is available so we can switch
+	 * direction.
+	 */
+	if (port->sdata->have_paddr)
+		flags |= GPIO_GENERIC_READ_OUTPUT_REG_SET;
+
+	config = (struct gpio_generic_chip_config) {
+		.dev = dev,
+		.sz = 4,
+		.dat = port->gpio_base + GPIO_PDIR,
+		.set = port->gpio_base + GPIO_PDOR,
+		.dirout = port->sdata->have_paddr ?
+				port->gpio_base + GPIO_PDDR : NULL,
+		.flags = flags,
+	};
+
+	ret = gpio_generic_chip_init(&port->chip, &config);
+	if (ret)
+		return dev_err_probe(dev, ret, "unable to init generic GPIO\n");
 	gc->label = dev_name(dev);
-	gc->ngpio = VF610_GPIO_PER_PORT;
-	gc->base = of_alias_get_id(np, "gpio") * VF610_GPIO_PER_PORT;
-
-	gc->request = gpiochip_generic_request;
-	gc->free = gpiochip_generic_free;
-	gc->direction_input = vf610_gpio_direction_input;
-	gc->get = vf610_gpio_get;
-	gc->direction_output = vf610_gpio_direction_output;
-	gc->set = vf610_gpio_set;
+	gc->base = -1;
 
 	/* Mask all GPIO interrupts */
 	for (i = 0; i < gc->ngpio; i++)
@@ -359,4 +352,6 @@ static struct platform_driver vf610_gpio_driver = {
 	.probe		= vf610_gpio_probe,
 };
 
-builtin_platform_driver(vf610_gpio_driver);
+module_platform_driver(vf610_gpio_driver);
+MODULE_DESCRIPTION("VF610 GPIO driver");
+MODULE_LICENSE("GPL");