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Subject[PATCH 4/4] at91/input: touchscreen support for at91sam9g45ekes
Date
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>
---
arch/arm/mach-at91/at91sam9g45_devices.c | 51 ++++++++++++++++++++++++++++++
arch/arm/mach-at91/board-sam9m10g45ek.c | 12 +++++++
drivers/input/touchscreen/Kconfig | 2 +-
3 files changed, 64 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 332b784..a5a4eb1 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -810,6 +810,57 @@ static void __init at91_add_device_rtc(void) {}


/* --------------------------------------------------------------------
+ * 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
* -------------------------------------------------------------------- */

diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
index 64c3843..3d6764b 100644
--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
@@ -229,6 +229,16 @@ static struct atmel_lcdfb_info __initdata ek_lcdc_data;


/*
+ * Touchscreen
+ */
+static struct at91_tsadcc_data ek_tsadcc_data = {
+ .adc_clock = 300000,
+ .pendet_debounce = 0x0d,
+ .ts_sample_hold_time = 0x0a,
+};
+
+
+/*
* GPIO Buttons
*/
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
@@ -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 */
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 8cc453c..fddae60 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -297,7 +297,7 @@ 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).
--
1.5.6.5


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