diff options
| -rw-r--r-- | drivers/gpio/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/gpio/gpio-iop.c | 115 |
2 files changed, 24 insertions, 94 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 17842e6a56dc..68c2d647be9a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -228,7 +228,8 @@ config GPIO_ICH config GPIO_IOP tristate "Intel IOP GPIO" - depends on ARM && (ARCH_IOP32X || ARCH_IOP33X) + depends on ARCH_IOP32X || ARCH_IOP33X || COMPILE_TEST + select GPIO_GENERIC help Say yes here to support the GPIO functionality of a number of Intel IOP32X or IOP33X. diff --git a/drivers/gpio/gpio-iop.c b/drivers/gpio/gpio-iop.c index 860c535922fd..98c7ff2a76e7 100644 --- a/drivers/gpio/gpio-iop.c +++ b/drivers/gpio/gpio-iop.c @@ -10,111 +10,40 @@ * your option) any later version. */ -#include <linux/device.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/gpio.h> -#include <linux/export.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/gpio/driver.h> #include <linux/platform_device.h> -#include <linux/bitops.h> -#include <linux/io.h> -#define IOP3XX_N_GPIOS 8 - -#define GPIO_IN 0 -#define GPIO_OUT 1 -#define GPIO_LOW 0 -#define GPIO_HIGH 1 - -/* Memory base offset */ -static void __iomem *base; - -#define IOP3XX_GPIO_REG(reg) (base + (reg)) -#define IOP3XX_GPOE IOP3XX_GPIO_REG(0x0000) -#define IOP3XX_GPID IOP3XX_GPIO_REG(0x0004) -#define IOP3XX_GPOD IOP3XX_GPIO_REG(0x0008) - -static void gpio_line_config(int line, int direction) -{ - unsigned long flags; - u32 val; - - local_irq_save(flags); - val = readl(IOP3XX_GPOE); - if (direction == GPIO_IN) { - val |= BIT(line); - } else if (direction == GPIO_OUT) { - val &= ~BIT(line); - } - writel(val, IOP3XX_GPOE); - local_irq_restore(flags); -} - -static int gpio_line_get(int line) -{ - return !!(readl(IOP3XX_GPID) & BIT(line)); -} - -static void gpio_line_set(int line, int value) -{ - unsigned long flags; - u32 val; - - local_irq_save(flags); - val = readl(IOP3XX_GPOD); - if (value == GPIO_LOW) { - val &= ~BIT(line); - } else if (value == GPIO_HIGH) { - val |= BIT(line); - } - writel(val, IOP3XX_GPOD); - local_irq_restore(flags); -} - -static int iop3xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) -{ - gpio_line_config(gpio, GPIO_IN); - return 0; -} - -static int iop3xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level) -{ - gpio_line_set(gpio, level); - gpio_line_config(gpio, GPIO_OUT); - return 0; -} - -static int iop3xx_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -{ - return gpio_line_get(gpio); -} - -static void iop3xx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value) -{ - gpio_line_set(gpio, value); -} - -static struct gpio_chip iop3xx_chip = { - .label = "iop3xx", - .direction_input = iop3xx_gpio_direction_input, - .get = iop3xx_gpio_get_value, - .direction_output = iop3xx_gpio_direction_output, - .set = iop3xx_gpio_set_value, - .base = 0, - .ngpio = IOP3XX_N_GPIOS, -}; +#define IOP3XX_GPOE 0x0000 +#define IOP3XX_GPID 0x0004 +#define IOP3XX_GPOD 0x0008 static int iop3xx_gpio_probe(struct platform_device *pdev) { struct resource *res; + struct gpio_chip *gc; + void __iomem *base; + int err; + + gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL); + if (!gc) + return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) return PTR_ERR(base); - return devm_gpiochip_add_data(&pdev->dev, &iop3xx_chip, NULL); + err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID, + base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0); + if (err) + return err; + + gc->base = 0; + gc->owner = THIS_MODULE; + + return devm_gpiochip_add_data(&pdev->dev, gc, NULL); } static struct platform_driver iop3xx_gpio_driver = { |