diff options
Diffstat (limited to 'target/linux/mcs814x/files-3.14/drivers/gpio')
| -rw-r--r-- | target/linux/mcs814x/files-3.14/drivers/gpio/gpio-mcs814x.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/target/linux/mcs814x/files-3.14/drivers/gpio/gpio-mcs814x.c b/target/linux/mcs814x/files-3.14/drivers/gpio/gpio-mcs814x.c deleted file mode 100644 index 2817e56c6d..0000000000 --- a/target/linux/mcs814x/files-3.14/drivers/gpio/gpio-mcs814x.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * Moschip MCS814x GPIO support - * - * Copyright (C) 2012, Florian Fainelli <florian@openwrt.org> - * - * Licensed under the GPLv2 - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/gpio.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_address.h> - -struct mcs814x_gpio_chip { - void __iomem *regs; - struct gpio_chip chip; -}; - -#define GPIO_PIN 0x00 -#define GPIO_DIR 0x04 - -#define to_mcs814x_gpio_chip(x) container_of(x, struct mcs814x_gpio_chip, chip) - -static int mcs814x_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct mcs814x_gpio_chip *mcs814x = to_mcs814x_gpio_chip(chip); - - return readl_relaxed(mcs814x->regs + GPIO_PIN) & (1 << offset); -} - -static void mcs814x_gpio_set(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct mcs814x_gpio_chip *mcs814x = to_mcs814x_gpio_chip(chip); - u32 mask; - - mask = readl_relaxed(mcs814x->regs + GPIO_PIN); - if (value) - mask |= (1 << offset); - else - mask &= ~(1 << offset); - writel_relaxed(mask, mcs814x->regs + GPIO_PIN); -} - -static int mcs814x_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct mcs814x_gpio_chip *mcs814x = to_mcs814x_gpio_chip(chip); - u32 mask; - - mask = readl_relaxed(mcs814x->regs + GPIO_DIR); - mask &= ~(1 << offset); - writel_relaxed(mask, mcs814x->regs + GPIO_DIR); - - return 0; -} - -static int mcs814x_gpio_direction_input(struct gpio_chip *chip, - unsigned offset) -{ - struct mcs814x_gpio_chip *mcs814x = to_mcs814x_gpio_chip(chip); - u32 mask; - - mask = readl_relaxed(mcs814x->regs + GPIO_DIR); - mask |= (1 << offset); - writel_relaxed(mask, mcs814x->regs + GPIO_DIR); - - return 0; -} - -static int mcs814x_gpio_probe(struct platform_device *pdev) -{ - struct resource *res; - struct mcs814x_gpio_chip *mcs814x_chip; - int ret; - const unsigned int *num_gpios; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - num_gpios = of_get_property(pdev->dev.of_node, "num-gpios", NULL); - if (!num_gpios) - dev_err(&pdev->dev, "FIXME: no num-gpios property\n"); - - mcs814x_chip = kzalloc(sizeof(*mcs814x_chip), GFP_KERNEL); - if (!mcs814x_chip) - return -ENOMEM; - - mcs814x_chip->regs = devm_request_and_ioremap(&pdev->dev, res); - if (!mcs814x_chip->regs) { - ret = -ENOMEM; - goto out; - } - - platform_set_drvdata(pdev, mcs814x_chip); - -#ifdef CONFIG_OF_GPIO - mcs814x_chip->chip.of_node = pdev->dev.of_node; -#endif - - mcs814x_chip->chip.label = pdev->name; - mcs814x_chip->chip.get = mcs814x_gpio_get; - mcs814x_chip->chip.set = mcs814x_gpio_set; - mcs814x_chip->chip.direction_input = mcs814x_gpio_direction_input; - mcs814x_chip->chip.direction_output = mcs814x_gpio_direction_output; - mcs814x_chip->chip.ngpio = be32_to_cpup(num_gpios); - /* we want dynamic base allocation */ - mcs814x_chip->chip.base = -1; - - ret = gpiochip_add(&mcs814x_chip->chip); - if (ret) { - dev_err(&pdev->dev, "failed to register gpiochip\n"); - goto out; - } - - return 0; - -out: - platform_set_drvdata(pdev, NULL); - kfree(mcs814x_chip); - return ret; -} - -static struct of_device_id mcs814x_gpio_ids[] = { - { .compatible = "moschip,mcs814x-gpio" }, - { /* sentinel */ }, -}; - -static struct platform_driver mcs814x_gpio_driver = { - .driver = { - .name = "mcs814x-gpio", - .owner = THIS_MODULE, - .of_match_table = mcs814x_gpio_ids, - }, - .probe = mcs814x_gpio_probe, -}; - -int __init mcs814x_gpio_init(void) -{ - return platform_driver_register(&mcs814x_gpio_driver); -} -postcore_initcall(mcs814x_gpio_init); |