diff options
Diffstat (limited to 'arch/arm/mach-omap2/common-board-devices.c')
| -rw-r--r-- | arch/arm/mach-omap2/common-board-devices.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/common-board-devices.c b/arch/arm/mach-omap2/common-board-devices.c index 1706ebcec08..4ba070e1288 100644 --- a/arch/arm/mach-omap2/common-board-devices.c +++ b/arch/arm/mach-omap2/common-board-devices.c @@ -35,6 +35,16 @@ static struct omap2_mcspi_device_config ads7846_mcspi_config = { .turbo_mode = 0, }; +/* + * ADS7846 driver maybe request a gpio according to the value + * of pdata->get_pendown_state, but we have done this. So set + * get_pendown_state to avoid twice gpio requesting. + */ +static int omap3_get_pendown_state(void) +{ + return !gpio_get_value(OMAP3_EVM_TS_GPIO); +} + static struct ads7846_platform_data ads7846_config = { .x_max = 0x0fff, .y_max = 0x0fff, @@ -45,6 +55,7 @@ static struct ads7846_platform_data ads7846_config = { .debounce_rep = 1, .gpio_pendown = -EINVAL, .keep_vref_on = 1, + .get_pendown_state = &omap3_get_pendown_state, }; static struct spi_board_info ads7846_spi_board_info __initdata = { @@ -63,14 +74,17 @@ void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce, struct spi_board_info *spi_bi = &ads7846_spi_board_info; int err; - if (board_pdata && board_pdata->get_pendown_state) { + if (gpio_pendown) { err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown"); if (err) { pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err); return; } - gpio_export(gpio_pendown, 0); + /* TS GPIOPendown doesn't allow user to change the direction */ + gpio_export(gpio_pendown, false); + + /* Set proper debouce time for ads7846. */ if (gpio_debounce) gpio_set_debounce(gpio_pendown, gpio_debounce); } |