diff options
author | Linus Walleij <linus.walleij@linaro.org> | 2013-09-09 13:59:51 +0400 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2013-09-21 01:03:36 +0400 |
commit | e9004f5039b3840089cb1cb0fe558a81e2bb55f0 (patch) | |
tree | 8c0effa3ea4b6e68786c7f11d16de1514746e615 /drivers/gpio/gpio-iop.c | |
parent | 272b98c6455f00884f0350f775c5342358ebb73f (diff) | |
download | linux-e9004f5039b3840089cb1cb0fe558a81e2bb55f0.tar.xz |
ARM: plat-iop: move the GPIO driver to drivers/gpio
Move the IOP GPIO driver to live with its siblings in the
GPIO subsystem.
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Mikael Pettersson <mikpe@it.uu.se>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-iop.c')
-rw-r--r-- | drivers/gpio/gpio-iop.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-iop.c b/drivers/gpio/gpio-iop.c new file mode 100644 index 000000000000..697de6dc4936 --- /dev/null +++ b/drivers/gpio/gpio-iop.c @@ -0,0 +1,93 @@ +/* + * arch/arm/plat-iop/gpio.c + * GPIO handling for Intel IOP3xx processors. + * + * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * 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 <asm/hardware/iop3xx.h> +#include <mach/gpio.h> + +void gpio_line_config(int line, int direction) +{ + unsigned long flags; + + local_irq_save(flags); + if (direction == GPIO_IN) { + *IOP3XX_GPOE |= 1 << line; + } else if (direction == GPIO_OUT) { + *IOP3XX_GPOE &= ~(1 << line); + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_config); + +int gpio_line_get(int line) +{ + return !!(*IOP3XX_GPID & (1 << line)); +} +EXPORT_SYMBOL(gpio_line_get); + +void gpio_line_set(int line, int value) +{ + unsigned long flags; + + local_irq_save(flags); + if (value == GPIO_LOW) { + *IOP3XX_GPOD &= ~(1 << line); + } else if (value == GPIO_HIGH) { + *IOP3XX_GPOD |= 1 << line; + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_set); + +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, +}; + +static int __init iop3xx_gpio_setup(void) +{ + return gpiochip_add(&iop3xx_chip); +} +arch_initcall(iop3xx_gpio_setup); |