@@ -184,6 +184,7 @@ config GPIO_F7188X
config GPIO_MOXART
bool "MOXART GPIO support"
depends on ARCH_MOXART
+ select GPIO_GENERIC
help
Select this option to enable GPIO driver for
MOXA ART SoC devices.
@@ -23,21 +23,12 @@
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/bitops.h>
+#include <linux/basic_mmio_gpio.h>
#define GPIO_DATA_OUT 0x00
#define GPIO_DATA_IN 0x04
#define GPIO_PIN_DIRECTION 0x08
-struct moxart_gpio_chip {
- struct gpio_chip gpio;
- void __iomem *base;
-};
-
-static inline struct moxart_gpio_chip *to_moxart_gpio(struct gpio_chip *chip)
-{
- return container_of(chip, struct moxart_gpio_chip, gpio);
-}
-
static int moxart_gpio_request(struct gpio_chip *chip, unsigned offset)
{
return pinctrl_request_gpio(offset);
@@ -48,90 +39,60 @@ static void moxart_gpio_free(struct gpio_chip *chip, unsigned offset)
pinctrl_free_gpio(offset);
}
-static void moxart_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct moxart_gpio_chip *gc = to_moxart_gpio(chip);
- void __iomem *ioaddr = gc->base + GPIO_DATA_OUT;
- u32 reg = readl(ioaddr);
-
- if (value)
- reg = reg | BIT(offset);
- else
- reg = reg & ~BIT(offset);
-
- writel(reg, ioaddr);
-}
-
static int moxart_gpio_get(struct gpio_chip *chip, unsigned offset)
{
- struct moxart_gpio_chip *gc = to_moxart_gpio(chip);
- u32 ret = readl(gc->base + GPIO_PIN_DIRECTION);
+ struct bgpio_chip *bgc = to_bgpio_chip(chip);
+ u32 ret = bgc->read_reg(bgc->reg_dir);
if (ret & BIT(offset))
- return !!(readl(gc->base + GPIO_DATA_OUT) & BIT(offset));
+ return !!(bgc->read_reg(bgc->reg_set) & BIT(offset));
else
- return !!(readl(gc->base + GPIO_DATA_IN) & BIT(offset));
-}
-
-static int moxart_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- struct moxart_gpio_chip *gc = to_moxart_gpio(chip);
- void __iomem *ioaddr = gc->base + GPIO_PIN_DIRECTION;
-
- writel(readl(ioaddr) & ~BIT(offset), ioaddr);
- return 0;
+ return !!(bgc->read_reg(bgc->reg_dat) & BIT(offset));
}
-static int moxart_gpio_direction_output(struct gpio_chip *chip,
- unsigned offset, int value)
-{
- struct moxart_gpio_chip *gc = to_moxart_gpio(chip);
- void __iomem *ioaddr = gc->base + GPIO_PIN_DIRECTION;
-
- moxart_gpio_set(chip, offset, value);
- writel(readl(ioaddr) | BIT(offset), ioaddr);
- return 0;
-}
-
-static struct gpio_chip moxart_template_chip = {
- .label = "moxart-gpio",
- .request = moxart_gpio_request,
- .free = moxart_gpio_free,
- .direction_input = moxart_gpio_direction_input,
- .direction_output = moxart_gpio_direction_output,
- .set = moxart_gpio_set,
- .get = moxart_gpio_get,
- .ngpio = 32,
- .owner = THIS_MODULE,
-};
-
static int moxart_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
- struct moxart_gpio_chip *mgc;
+ struct bgpio_chip *bgc;
+ void __iomem *base;
int ret;
- mgc = devm_kzalloc(dev, sizeof(*mgc), GFP_KERNEL);
- if (!mgc)
+ bgc = devm_kzalloc(dev, sizeof(*bgc), GFP_KERNEL);
+ if (!bgc)
return -ENOMEM;
- mgc->gpio = moxart_template_chip;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mgc->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(mgc->base))
- return PTR_ERR(mgc->base);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ ret = bgpio_init(bgc, dev, 4, base + GPIO_DATA_IN,
+ base + GPIO_DATA_OUT, NULL,
+ base + GPIO_PIN_DIRECTION, NULL, 0);
+
+ if (ret) {
+ dev_err(&pdev->dev, "bgpio_init failed\n");
+ return ret;
+ }
- mgc->gpio.dev = dev;
+ bgc->gc.label = "moxart-gpio";
+ bgc->gc.request = moxart_gpio_request;
+ bgc->gc.free = moxart_gpio_free;
+ bgc->gc.get = moxart_gpio_get;
+ bgc->data = bgc->read_reg(bgc->reg_set);
+ bgc->gc.ngpio = 32;
+ bgc->gc.dev = dev;
+ bgc->gc.owner = THIS_MODULE;
- ret = gpiochip_add(&mgc->gpio);
+ ret = gpiochip_add(&bgc->gc);
if (ret) {
dev_err(dev, "%s: gpiochip_add failed\n",
dev->of_node->full_name);
return ret;
}
- return 0;
+ return ret;
}
static const struct of_device_id moxart_gpio_match[] = {