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arm: omap2plus: fix ads7846 pendown gpio request 

introduced by: 96974a24
(omap: consolidate touch screen initialization among different boards)

ads7846 driver can use either gpio_pendown or get_pendown_state()
callback. In case of gpio_pendown, it requests the provided gpio_pendown
thus resulting in double requesting that gpio:

ads7846 spi1.0: failed to request pendown GPIO57
ads7846: probe of spi1.0 failed with error -16

Fix this by restricting the gpio request to the case of
get_pendown_state() callback is used.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Thomas Weber <weber@corscience.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Igor Grinberg 2011-05-04 18:04:55 +03:00 committed by Tony Lindgren
parent 03b562d785
commit e68273baf3
1 changed files with 10 additions and 10 deletions
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20
arch/arm/mach-omap2/common-board-devices.c
View File

@ -85,18 +85,18 @@ 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;
err = gpio_request(gpio_pendown, "TS PenDown");
if (err) {
pr_err("Could not obtain gpio for TS PenDown: %d\n", err);
return;
if (board_pdata && board_pdata->get_pendown_state) {
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);
if (gpio_debounce)
gpio_set_debounce(gpio_pendown, gpio_debounce);
}
gpio_direction_input(gpio_pendown);
gpio_export(gpio_pendown, 0);
if (gpio_debounce)
gpio_set_debounce(gpio_pendown, gpio_debounce);
ads7846_config.gpio_pendown = gpio_pendown;
spi_bi->bus_num = bus_num;