diff options
author | Alban Bedel <albeu@free.fr> | 2016-01-28 19:44:29 (GMT) |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2016-02-10 10:07:24 (GMT) |
commit | ab32770ec8d64254503d85128ba05de41d792ff2 (patch) | |
tree | ab8bdfa9d9f3f9512909dd7ee46919af42dc53f1 | |
parent | 60afe31d1f6245c3156d540b0c7e5381ea8069d1 (diff) | |
download | linux-ab32770ec8d64254503d85128ba05de41d792ff2.tar.xz |
gpio: ath79: Move to the generic GPIO driver
Drop most of the code in favor of the generic MMIO GPIO driver.
As the driver now depend on CONFIG_GPIO_GENERIC also add a Kconfig
entry to make the driver optional.
We leave the base pointer and lock in the data struct because they are
needed for the IRQ support.
Signed-off-by: Alban Bedel <albeu@free.fr>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-rw-r--r-- | drivers/gpio/Kconfig | 9 | ||||
-rw-r--r-- | drivers/gpio/Makefile | 2 | ||||
-rw-r--r-- | drivers/gpio/gpio-ath79.c | 126 |
3 files changed, 24 insertions, 113 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 77df866..020a44a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -126,6 +126,15 @@ config GPIO_AMDPT driver for GPIO functionality on Promontory IOHub Require ACPI ASL code to enumerate as a platform device. +config GPIO_ATH79 + tristate "Atheros AR71XX/AR724X/AR913X GPIO support" + default y if ATH79 + depends on ATH79 + select GPIO_GENERIC + help + Select this option to enable GPIO driver for + Atheros AR71XX/AR724X/AR913X SoC devices. + config GPIO_BCM_KONA bool "Broadcom Kona GPIO" depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST) diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 2f5852d..30ff7de 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -24,7 +24,7 @@ obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o -obj-$(CONFIG_ATH79) += gpio-ath79.o +obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c index d13dd13..13d9648 100644 --- a/drivers/gpio/gpio-ath79.c +++ b/drivers/gpio/gpio-ath79.c @@ -19,115 +19,11 @@ #include <asm/mach-ath79/ar71xx_regs.h> struct ath79_gpio_ctrl { - struct gpio_chip chip; + struct gpio_chip gc; void __iomem *base; spinlock_t lock; }; -static void ath79_gpio_set_value(struct gpio_chip *chip, - unsigned gpio, int value) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - - if (value) - __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_SET); - else - __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_CLEAR); -} - -static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - - return (__raw_readl(ctrl->base + AR71XX_GPIO_REG_IN) >> gpio) & 1; -} - -static int ath79_gpio_direction_input(struct gpio_chip *chip, - unsigned offset) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - unsigned long flags; - - spin_lock_irqsave(&ctrl->lock, flags); - - __raw_writel( - __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset), - ctrl->base + AR71XX_GPIO_REG_OE); - - spin_unlock_irqrestore(&ctrl->lock, flags); - - return 0; -} - -static int ath79_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - unsigned long flags; - - spin_lock_irqsave(&ctrl->lock, flags); - - if (value) - __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET); - else - __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR); - - __raw_writel( - __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset), - ctrl->base + AR71XX_GPIO_REG_OE); - - spin_unlock_irqrestore(&ctrl->lock, flags); - - return 0; -} - -static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - unsigned long flags; - - spin_lock_irqsave(&ctrl->lock, flags); - - __raw_writel( - __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset), - ctrl->base + AR71XX_GPIO_REG_OE); - - spin_unlock_irqrestore(&ctrl->lock, flags); - - return 0; -} - -static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct ath79_gpio_ctrl *ctrl = gpiochip_get_data(chip); - unsigned long flags; - - spin_lock_irqsave(&ctrl->lock, flags); - - if (value) - __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET); - else - __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR); - - __raw_writel( - __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset), - ctrl->base + AR71XX_GPIO_REG_OE); - - spin_unlock_irqrestore(&ctrl->lock, flags); - - return 0; -} - -static const struct gpio_chip ath79_gpio_chip = { - .label = "ath79", - .get = ath79_gpio_get_value, - .set = ath79_gpio_set_value, - .direction_input = ath79_gpio_direction_input, - .direction_output = ath79_gpio_direction_output, - .base = 0, -}; - static const struct of_device_id ath79_gpio_of_match[] = { { .compatible = "qca,ar7100-gpio" }, { .compatible = "qca,ar9340-gpio" }, @@ -174,15 +70,21 @@ static int ath79_gpio_probe(struct platform_device *pdev) return -ENOMEM; spin_lock_init(&ctrl->lock); - memcpy(&ctrl->chip, &ath79_gpio_chip, sizeof(ctrl->chip)); - ctrl->chip.parent = &pdev->dev; - ctrl->chip.ngpio = ath79_gpio_count; - if (oe_inverted) { - ctrl->chip.direction_input = ar934x_gpio_direction_input; - ctrl->chip.direction_output = ar934x_gpio_direction_output; + err = bgpio_init(&ctrl->gc, &pdev->dev, 4, + ctrl->base + AR71XX_GPIO_REG_IN, + ctrl->base + AR71XX_GPIO_REG_SET, + ctrl->base + AR71XX_GPIO_REG_CLEAR, + oe_inverted ? NULL : ctrl->base + AR71XX_GPIO_REG_OE, + oe_inverted ? ctrl->base + AR71XX_GPIO_REG_OE : NULL, + 0); + if (err) { + dev_err(&pdev->dev, "bgpio_init failed\n"); + return err; } + /* Use base 0 to stay compatible with legacy platforms */ + ctrl->gc.base = 0; - err = gpiochip_add_data(&ctrl->chip, ctrl); + err = gpiochip_add_data(&ctrl->gc, ctrl); if (err) { dev_err(&pdev->dev, "cannot add AR71xx GPIO chip, error=%d", err); |