ARM: OMAP: Mistral ads7846 pendown state

Syncing the ads7846 code with mainstream means that the Mistral support
needs to include a callback to read the pendown state.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c
index 8f8f50b70588..e0711d23a6b0 100644
--- a/arch/arm/mach-omap1/board-osk.c
+++ b/arch/arm/mach-omap1/board-osk.c
@@ -299,12 +299,17 @@ static struct platform_device *mistral_devices[] __initdata = {
         &osk5912_lcd_device,
 };
 
+static int mistral_get_pendown_state(void)
+{
+        return !omap_get_gpio_datain(4);
+}
+
 static const struct ads7846_platform_data mistral_ts_info = {
         .model                  = 7846,
         .vref_delay_usecs       = 100,  /* internal, no capacitor */
         .x_plate_ohms           = 419,
         .y_plate_ohms           = 486,
-        // .{x,y,pressure}_{min,max}
+        .get_pendown_state      = mistral_get_pendown_state,
 };
 
 static struct spi_board_info __initdata mistral_boardinfo[] = { {