Blackfin: bf537-stamp: add example ADS7846 touchscreen resources

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 35 insertions, 1 deletions

diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c
index 9bc7bd3f35f8..7a1d645bbfbb 100644
--- a/arch/blackfin/mach-bf537/boards/stamp.c
+++ b/arch/blackfin/mach-bf537/boards/stamp.c
@@ -825,6 +825,29 @@ static inline void adf702x_mac_init(void)
 static inline void adf702x_mac_init(void) {}
 #endif
 
+#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
+#include <linux/spi/ads7846.h>
+static struct bfin5xx_spi_chip ad7873_spi_chip_info = {
+        .bits_per_word  = 8,
+};
+
+static int ads7873_get_pendown_state(void)
+{
+        return gpio_get_value(GPIO_PF6);
+}
+
+static struct ads7846_platform_data __initdata ad7873_pdata = {
+        .model          = 7873,         /* AD7873 */
+        .x_max          = 0xfff,
+        .y_max          = 0xfff,
+        .x_plate_ohms   = 620,
+        .debounce_max   = 1,
+        .debounce_rep   = 0,
+        .debounce_tol   = (~0),
+        .get_pendown_state = ads7873_get_pendown_state,
+};
+#endif
+
 #if defined(CONFIG_MTD_DATAFLASH) \
         || defined(CONFIG_MTD_DATAFLASH_MODULE)
 
@@ -1026,7 +1049,18 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
                 .mode = SPI_MODE_0,
         },
 #endif
-
+#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
+        {
+                .modalias = "ads7846",
+                .max_speed_hz = 2000000,     /* max spi clock (SCK) speed in HZ */
+                .bus_num = 0,
+                .irq = IRQ_PF6,
+                .chip_select = GPIO_PF10 + MAX_CTRL_CS, /* GPIO controlled SSEL */
+                .controller_data = &ad7873_spi_chip_info,
+                .platform_data = &ad7873_pdata,
+                .mode = SPI_MODE_0,
+        },
+#endif
 };
 
 #if defined(CONFIG_SPI_BFIN) || defined(CONFIG_SPI_BFIN_MODULE)