[ARM] 5260/1: [AT91] Touchscreen on AT91SAM9RL

This patch adds initialization of the Touchscreen controller for the
AT91SAM9RL processor.

Signed-off-by: Justin Waters <justin.waters@timesys.com>
Signed-off-by: Dan Liang <dan.liang@atmel.com>
Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 51 insertions, 0 deletions

diff --git a/arch/arm/configs/at91sam9rlek_defconfig b/arch/arm/configs/at91sam9rlek_defconfig
index 1c76642272a1..811bebbdc784 100644
--- a/arch/arm/configs/at91sam9rlek_defconfig
+++ b/arch/arm/configs/at91sam9rlek_defconfig
@@ -496,6 +496,7 @@ CONFIG_INPUT_TOUCHSCREEN=y
 # CONFIG_TOUCHSCREEN_PENMOUNT is not set
 # CONFIG_TOUCHSCREEN_TOUCHRIGHT is not set
 # CONFIG_TOUCHSCREEN_TOUCHWIN is not set
+CONFIG_TOUCHSCREEN_ATMEL_TSADCC=y
 # CONFIG_TOUCHSCREEN_UCB1400 is not set
 # CONFIG_TOUCHSCREEN_USB_COMPOSITE is not set
 # CONFIG_INPUT_MISC is not set
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 3f9fed4902b8..87deb1e1b529 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -527,6 +527,51 @@ static void __init at91_add_device_tc(void) { }
 
 
 /* --------------------------------------------------------------------
+ *  Touchscreen
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) || defined(CONFIG_TOUCHSCREEN_ATMEL_TSADCC_MODULE)
+static u64 tsadcc_dmamask = DMA_BIT_MASK(32);
+
+static struct resource tsadcc_resources[] = {
+        [0] = {
+                .start  = AT91SAM9RL_BASE_TSC,
+                .end    = AT91SAM9RL_BASE_TSC + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9RL_ID_TSC,
+                .end    = AT91SAM9RL_ID_TSC,
+                .flags  = IORESOURCE_IRQ,
+        }
+};
+
+static struct platform_device at91sam9rl_tsadcc_device = {
+        .name           = "atmel_tsadcc",
+        .id             = -1,
+        .dev            = {
+                                .dma_mask               = &tsadcc_dmamask,
+                                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+        .resource       = tsadcc_resources,
+        .num_resources  = ARRAY_SIZE(tsadcc_resources),
+};
+
+void __init at91_add_device_tsadcc(void)
+{
+        at91_set_A_periph(AT91_PIN_PA17, 0);    /* AD0_XR */
+        at91_set_A_periph(AT91_PIN_PA18, 0);    /* AD1_XL */
+        at91_set_A_periph(AT91_PIN_PA19, 0);    /* AD2_YT */
+        at91_set_A_periph(AT91_PIN_PA20, 0);    /* AD3_TB */
+
+        platform_device_register(&at91sam9rl_tsadcc_device);
+}
+#else
+void __init at91_add_device_tsadcc(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  RTC
  * -------------------------------------------------------------------- */
 
diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index 3d3f61572cff..270851864308 100644
--- a/arch/arm/mach-at91/board-sam9rlek.c
+++ b/arch/arm/mach-at91/board-sam9rlek.c
@@ -195,6 +195,8 @@ static void __init ek_board_init(void)
         at91_add_device_mmc(0, &ek_mmc_data);
         /* LCD Controller */
         at91_add_device_lcdc(&ek_lcdc_data);
+        /* Touch Screen Controller */
+        at91_add_device_tsadcc();
 }
 
 MACHINE_START(AT91SAM9RLEK, "Atmel AT91SAM9RL-EK")
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index e852609d802f..fb51f0e0a83f 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -172,6 +172,9 @@ extern void __init at91_add_device_ac97(struct atmel_ac97_data *data);
  /* ISI */
 extern void __init at91_add_device_isi(void);
 
+ /* Touchscreen Controller */
+extern void __init at91_add_device_tsadcc(void);
+
  /* LEDs */
 extern void __init at91_init_leds(u8 cpu_led, u8 timer_led);
 extern void __init at91_gpio_leds(struct gpio_led *leds, int nr);