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AT91: add touchscreen support for at91sam9g45ekes

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New at91sam9g45ekes board provides a LCD with resistive touchscreen.
This is the support of this feature by atmel_tsadcc driver. This also
sets up platform parameters to be passed to the driver.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Nicolas Ferre 2009-11-19 09:32:52 -08:00 committed by Dmitry Torokhov
parent 423c9b0dc3
commit 985f37f827
3 changed files with 64 additions and 1 deletions
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51
arch/arm/mach-at91/at91sam9g45_devices.c
View File

@ -809,6 +809,57 @@ static void __init at91_add_device_rtc(void) {}
#endif
/* --------------------------------------------------------------------
* Touchscreen
* -------------------------------------------------------------------- */
#if defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) || defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC_MODULE)
static u64 tsadcc_dmamask = DMA_BIT_MASK(32);
static struct at91_tsadcc_data tsadcc_data;
static struct resource tsadcc_resources[] = {
[0] = {
.start = AT91SAM9G45_BASE_TSC,
.end = AT91SAM9G45_BASE_TSC + SZ_16K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = AT91SAM9G45_ID_TSC,
.end = AT91SAM9G45_ID_TSC,
.flags = IORESOURCE_IRQ,
}
};
static struct platform_device at91sam9g45_tsadcc_device = {
.name = "atmel_tsadcc",
.id = -1,
.dev = {
.dma_mask = &tsadcc_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &tsadcc_data,
},
.resource = tsadcc_resources,
.num_resources = ARRAY_SIZE(tsadcc_resources),
};
void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data)
{
if (!data)
return;
at91_set_gpio_input(AT91_PIN_PD20, 0); /* AD0_XR */
at91_set_gpio_input(AT91_PIN_PD21, 0); /* AD1_XL */
at91_set_gpio_input(AT91_PIN_PD22, 0); /* AD2_YT */
at91_set_gpio_input(AT91_PIN_PD23, 0); /* AD3_TB */
tsadcc_data = *data;
platform_device_register(&at91sam9g45_tsadcc_device);
}
#else
void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {}
#endif
/* --------------------------------------------------------------------
* RTT
* -------------------------------------------------------------------- */

12
arch/arm/mach-at91/board-sam9m10g45ek.c
View File

@ -228,6 +228,16 @@ static struct atmel_lcdfb_info __initdata ek_lcdc_data;
#endif
/*
* Touchscreen
*/
static struct at91_tsadcc_data ek_tsadcc_data = {
.adc_clock = 300000,
.pendet_debounce = 0x0d,
.ts_sample_hold_time = 0x0a,
};
/*
* GPIO Buttons
*/
@ -378,6 +388,8 @@ static void __init ek_board_init(void)
at91_add_device_i2c(0, NULL, 0);
/* LCD Controller */
at91_add_device_lcdc(&ek_lcdc_data);
/* Touch Screen */
at91_add_device_tsadcc(&ek_tsadcc_data);
/* Push Buttons */
ek_add_device_buttons();
/* AC97 */

2
drivers/input/touchscreen/Kconfig
View File

@ -309,7 +309,7 @@ config TOUCHSCREEN_TOUCHWIN
config TOUCHSCREEN_ATMEL_TSADCC
tristate "Atmel Touchscreen Interface"
depends on ARCH_AT91SAM9RL
depends on ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
help
Say Y here if you have a 4-wire touchscreen connected to the
ADC Controller on your Atmel SoC (such as the AT91SAM9RL).