linux-kernel - [PATCHv3 09/15] ARM: at91: sam9rlek add touchscreen support through at91

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Date:	Tue, 15 Apr 2014 12:28:04 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-iio@...r.kernel.org, linux-input@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCHv3 09/15] 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@...e-electrons.com>
---
 arch/arm/mach-at91/board-sam9rlek.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index 604eecf6cd70..35d420247e25 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>
 
@@ -239,6 +240,17 @@ 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)
@@ -312,6 +324,8 @@ 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 */
-- 
1.8.3.2

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