diff options
Diffstat (limited to 'drivers/gpio/mxc_gpio.c')
| -rw-r--r-- | drivers/gpio/mxc_gpio.c | 51 |
1 files changed, 47 insertions, 4 deletions
diff --git a/drivers/gpio/mxc_gpio.c b/drivers/gpio/mxc_gpio.c index 6efbb02c1..a7f36b293 100644 --- a/drivers/gpio/mxc_gpio.c +++ b/drivers/gpio/mxc_gpio.c @@ -2,6 +2,9 @@ * Copyright (C) 2009 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de> * + * Copyright (C) 2011 + * Stefano Babic, DENX Software Engineering, <sbabic@denx.de> + * * See file CREDITS for list of people who contributed to this * project. * @@ -22,10 +25,16 @@ */ #include <common.h> #include <asm/arch/imx-regs.h> +#include <asm/gpio.h> #include <asm/io.h> -#include <mxc_gpio.h> #include <errno.h> +enum mxc_gpio_direction { + MXC_GPIO_DIRECTION_IN, + MXC_GPIO_DIRECTION_OUT, +}; + + /* GPIO port description */ static unsigned long gpio_ports[] = { [0] = GPIO1_BASE_ADDR, @@ -41,7 +50,8 @@ static unsigned long gpio_ports[] = { #endif }; -int mxc_gpio_direction(unsigned int gpio, enum mxc_gpio_direction direction) +static int mxc_gpio_direction(unsigned int gpio, + enum mxc_gpio_direction direction) { unsigned int port = gpio >> 5; struct gpio_regs *regs; @@ -68,7 +78,7 @@ int mxc_gpio_direction(unsigned int gpio, enum mxc_gpio_direction direction) return 0; } -void mxc_gpio_set(unsigned int gpio, unsigned int value) +void gpio_set_value(int gpio, int value) { unsigned int port = gpio >> 5; struct gpio_regs *regs; @@ -89,7 +99,7 @@ void mxc_gpio_set(unsigned int gpio, unsigned int value) writel(l, ®s->gpio_dr); } -int mxc_gpio_get(unsigned int gpio) +int gpio_get_value(int gpio) { unsigned int port = gpio >> 5; struct gpio_regs *regs; @@ -106,3 +116,36 @@ int mxc_gpio_get(unsigned int gpio) return l; } + +int gpio_request(int gp, const char *label) +{ + unsigned int port = gp >> 5; + if (port >= ARRAY_SIZE(gpio_ports)) + return -EINVAL; + return 0; +} + +void gpio_free(int gp) +{ +} + +void gpio_toggle_value(int gp) +{ + gpio_set_value(gp, !gpio_get_value(gp)); +} + +int gpio_direction_input(int gp) +{ + return mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_IN); +} + +int gpio_direction_output(int gp, int value) +{ + int ret = mxc_gpio_direction(gp, MXC_GPIO_DIRECTION_OUT); + + if (ret < 0) + return ret; + + gpio_set_value(gp, value); + return 0; +} |