ARM: at91: sam9rlek add touchscreen support through at91_adc

at91_adc now supports reading a touchscreen for ADCs without a TSMR register.
Enable touchscreen support through at91_adc. This allows to use both a
touchscreen and the remaining ADC channel at the same time.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index 6b81e4671646..1db43e32e6c5 100644
--- a/arch/arm/mach-at91/board-sam9rlek.c
+++ b/arch/arm/mach-at91/board-sam9rlek.c
@@ -18,6 +18,7 @@
 #include <linux/clk.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
+#include <linux/platform_data/at91_adc.h>
 
 #include <video/atmel_lcdc.h>
 
@@ -240,6 +241,17 @@ static struct at91_tsadcc_data ek_tsadcc_data = {
 
 
 /*
+ * ADC + Touchscreen
+ */
+static struct at91_adc_data ek_adc_data = {
+        .channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5),
+        .use_external_triggers = true,
+        .vref = 3300,
+        .touchscreen_type = ATMEL_ADC_TOUCHSCREEN_4WIRE,
+};
+
+
+/*
  * GPIO Buttons
  */
 #if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
@@ -313,6 +325,8 @@ static void __init ek_board_init(void)
         at91_add_device_ac97(&ek_ac97_data);
         /* Touch Screen Controller */
         at91_add_device_tsadcc(&ek_tsadcc_data);
+        /* Touch Screen Controller + ADC */
+        at91_add_device_adc(&ek_adc_data);
         /* LEDs */
         at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
         /* Push Buttons */