ARM: OMAP: TSC2046 touchscreen support for 2430

This is a rework of the tsc2046 driver from TI's tree, based
on the tsc2301 driver and using the new SPI framework.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/board-2430sdp.c b/arch/arm/mach-omap2/board-2430sdp.c
index 3e308840744c916a0e06e8f63ae4bbc674d9e792..5ee970bec39f1e63c78baa0eb7dbbe541188ba03 100644 (file)
--- a/arch/arm/mach-omap2/board-2430sdp.c
+++ b/arch/arm/mach-omap2/board-2430sdp.c
@@ -21,6 +21,8 @@
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/clk.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc2046.h>
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
@@ -33,6 +35,7 @@
 #include <asm/arch/board.h>
 #include <asm/arch/common.h>
 #include <asm/arch/gpmc.h>
+#include <asm/arch/mcspi.h>
 #include "prcm-regs.h"
 
 #include <asm/io.h>
@@ -40,6 +43,9 @@
 #define        SDP2430_FLASH_CS        0
 #define        SDP2430_SMC91X_CS       5
 
+/* TSC2046 (touchscreen) */
+#define TS_GPIO                 24
+
 static struct mtd_partition sdp2430_partitions[] = {
        /* bootloader (U-Boot, etc) in first sector */
        {
@@ -119,6 +125,29 @@ static struct platform_device *sdp2430_devices[] __initdata = {
        &sdp2430_flash_device,
 };
 
+static struct tsc2046_platform_data tsc2046_config = {
+       .dav_gpio       = TS_GPIO,
+       .gpio_debounce  = 0xa,
+};
+
+static struct omap2_mcspi_device_config tsc2046_mcspi_config = {
+       .turbo_mode     = 0,
+       .single_channel = 0,  /* 0: slave, 1: master */
+};
+
+static struct spi_board_info sdp2430_spi_board_info[] __initdata = {
+       [0] = {
+               /* TSC2046 operates at a max freqency of 2MHz, so
+                * operate slightly below at 1.5MHz */
+               .modalias       = "tsc2046",
+               .bus_num        = 1,
+               .chip_select    = 0,
+               .max_speed_hz   = 1500000,
+               .controller_data= &tsc2046_mcspi_config,
+               .platform_data  = &tsc2046_config,
+       },
+};
+
 static inline void __init sdp2430_init_smc91x(void)
 {
        int eth_cs;
@@ -274,6 +303,9 @@ static void __init omap_2430sdp_init(void)
        omap_serial_init();
 
        sdp2430_flash_init();
+
+       spi_register_board_info(sdp2430_spi_board_info,
+                               ARRAY_SIZE(sdp2430_spi_board_info));
 }
 
 static void __init omap_2430sdp_map_io(void)