omap: overo: Add regulator for ads7846

The ads7846 driver now requires a regulator.  This patch adds the
necessary regulator to the overo board file.  Without it, the
following error occurs (and the touchscreen will not function):

ads7846 spi1.0: unable to get regulator: -19

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index d621ee8fec0c..4278ecb799a2 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -28,6 +28,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c/twl.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/fixed.h>
 #include <linux/spi/spi.h>
 
 #include <linux/mtd/mtd.h>
@@ -97,6 +98,34 @@ static struct ads7846_platform_data ads7846_config = {
         .keep_vref_on           = 1,
 };
 
+/* fixed regulator for ads7846 */
+static struct regulator_consumer_supply ads7846_supply =
+        REGULATOR_SUPPLY("vcc", "spi1.0");
+
+static struct regulator_init_data vads7846_regulator = {
+        .constraints = {
+                .valid_ops_mask         = REGULATOR_CHANGE_STATUS,
+        },
+        .num_consumer_supplies  = 1,
+        .consumer_supplies      = &ads7846_supply,
+};
+
+static struct fixed_voltage_config vads7846 = {
+        .supply_name            = "vads7846",
+        .microvolts             = 3300000, /* 3.3V */
+        .gpio                   = -EINVAL,
+        .startup_delay          = 0,
+        .init_data              = &vads7846_regulator,
+};
+
+static struct platform_device vads7846_device = {
+        .name           = "reg-fixed-voltage",
+        .id             = 1,
+        .dev = {
+                .platform_data = &vads7846,
+        },
+};
+
 static void __init overo_ads7846_init(void)
 {
         if ((gpio_request(OVERO_GPIO_PENDOWN, "ADS7846_PENDOWN") == 0) &&
@@ -106,6 +135,8 @@ static void __init overo_ads7846_init(void)
                 printk(KERN_ERR "could not obtain gpio for ADS7846_PENDOWN\n");
                 return;
         }
+
+        platform_device_register(&vads7846_device);
 }
 
 #else