1 files changed, 60 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index d3ceed398e0b..782268c91942 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -57,6 +57,65 @@
 #define GPMC_CS0_BASE  0x60
 #define GPMC_CS_SIZE   0x30
 
+#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
+        defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
+
+#include <mach/mcspi.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+
+static struct omap2_mcspi_device_config ads7846_mcspi_config = {
+        .turbo_mode     = 0,
+        .single_channel = 1,    /* 0: slave, 1: master */
+};
+
+static int ads7846_get_pendown_state(void)
+{
+        return !gpio_get_value(OVERO_GPIO_PENDOWN);
+}
+
+static struct ads7846_platform_data ads7846_config = {
+        .x_max                  = 0x0fff,
+        .y_max                  = 0x0fff,
+        .x_plate_ohms           = 180,
+        .pressure_max           = 255,
+        .debounce_max           = 10,
+        .debounce_tol           = 3,
+        .debounce_rep           = 1,
+        .get_pendown_state      = ads7846_get_pendown_state,
+        .keep_vref_on           = 1,
+};
+
+static struct spi_board_info overo_spi_board_info[] __initdata = {
+        {
+                .modalias               = "ads7846",
+                .bus_num                = 1,
+                .chip_select            = 0,
+                .max_speed_hz           = 1500000,
+                .controller_data        = &ads7846_mcspi_config,
+                .irq                    = OMAP_GPIO_IRQ(OVERO_GPIO_PENDOWN),
+                .platform_data          = &ads7846_config,
+        }
+};
+
+static void __init overo_ads7846_init(void)
+{
+        if ((gpio_request(OVERO_GPIO_PENDOWN, "ADS7846_PENDOWN") == 0) &&
+            (gpio_direction_input(OVERO_GPIO_PENDOWN) == 0)) {
+                gpio_export(OVERO_GPIO_PENDOWN, 0);
+        } else {
+                printk(KERN_ERR "could not obtain gpio for ADS7846_PENDOWN\n");
+                return;
+        }
+
+        spi_register_board_info(overo_spi_board_info,
+                        ARRAY_SIZE(overo_spi_board_info));
+}
+
+#else
+static inline void __init overo_ads7846_init(void) { return; }
+#endif
+
 static struct mtd_partition overo_nand_partitions[] = {
         {
                 .name           = "xloader",
@@ -230,6 +289,7 @@ static void __init overo_init(void)
         twl4030_mmc_init(mmc);
         overo_flash_init();
         usb_musb_init();
+        overo_ads7846_init();
 
         if ((gpio_request(OVERO_GPIO_W2W_NRESET,
                           "OVERO_GPIO_W2W_NRESET") == 0) &&