DevKit8500D/A User Manual - DMCS Pages for Students

3.6 Driver Development
3.6.1 Driver For The gpio_keys
1) Device Definition
linux-2.6.32-devkit8500/arch/arm/mach-omap2/board-devkit8500.c
Setup GPIO 26 as “menu” key, return value as “KEY_F1”, triggered on low level; gpio 29
as”back”key, return value as ”KEY_ESC”, triggered on low level. The structure template is shown
below.
static struct gpio_keys_button gpio_buttons[] = {
{
.code
= KEY_F1,
.gpio = 26,
.desc
.active_low
= "menu",
= true,
},
{
.code
= KEY_ESC,
.gpio = 29,
.desc
.active_low
= "back",
= true,
},
};
static struct gpio_keys_platform_data gpio_key_info = {
.buttons
.nbuttons
= gpio_buttons,
= ARRAY_SIZE(gpio_buttons),
};
static struct platform_device keys_gpio = {
.name
= "gpio-keys",
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