AT91: add touchscreen support for at91sam9g45ekes

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>

2 files changed, 63 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 332b784050b2..a5a4eb19fbbe 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 64c3843f323d..3d6764b3ad7a 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 */