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OMAP: Add function to get state of a GPIO output

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Read directly from OMAP_GPIO_DATAOUT to get the output state of the GPIO pin

Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Joel A Fernandes 2011-09-04 11:10:03 -05:00 committed by Albert ARIBAUD
parent 043cfcfb7e
commit 569919d8e2
2 changed files with 22 additions and 0 deletions
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20
arch/arm/cpu/armv7/omap-common/gpio.c
View file

@ -151,6 +151,26 @@ int omap_get_gpio_datain(int gpio)
& (1 << get_gpio_index(gpio))) != 0;
}
int omap_get_gpio_dataout(int gpio)
{
struct gpio_bank *bank;
void *reg;
if (check_gpio(gpio) < 0)
return -EINVAL;
bank = get_gpio_bank(gpio);
reg = bank->base;
switch (bank->method) {
case METHOD_GPIO_24XX:
reg += OMAP_GPIO_DATAOUT;
break;
default:
return -EINVAL;
}
return (__raw_readl(reg)
& (1 << get_gpio_index(gpio))) != 0;
}
static void _reset_gpio(const struct gpio_bank *bank, int gpio)
{
_set_gpio_direction(bank, get_gpio_index(gpio), 1);

2
arch/arm/include/asm/omap_gpio.h
View file

@ -61,5 +61,7 @@ void omap_set_gpio_direction(int gpio, int is_input);
void omap_set_gpio_dataout(int gpio, int enable);
/* Get the value of a gpio input */
int omap_get_gpio_datain(int gpio);
/* Get the value of a gpio output */
int omap_get_gpio_dataout(int gpio);
#endif /* _GPIO_H_ */