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-rw-r--r--arch/arm/mach-omap2/board-overo.c60
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 d3ceed398e0..782268c9194 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) &&