[PATCH 1/2] input:Regulator support in ROHM BU21013 touch panel

[Naveen Kumar G <naveen.gaddipati@xxxxxxxxxxxxxx>]

From: Naveen Kumar Gaddipati <naveen.gaddipati@xxxxxxxxxxxxxx>

Added the regulator support in ROHM BU21013 touch
panel driver.

Signed-off-by: Naveen Kumar Gaddipati <naveen.gaddipati@xxxxxxxxxxxxxx>
---
 drivers/input/touchscreen/bu21013_ts.c |   27 +++++++++++++++++++++++++++
 include/linux/input/bu21013.h          |    2 ++
 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
index f7fa9ef..531e982 100644
--- a/drivers/input/touchscreen/bu21013_ts.c
+++ b/drivers/input/touchscreen/bu21013_ts.c
@@ -12,6 +12,7 @@
 #include <linux/input.h>
 #include <linux/input/bu21013.h>
 #include <linux/slab.h>
+#include <linux/regulator/consumer.h>
 
 #define PEN_DOWN_INTR	0
 #define MAX_FINGERS	2
@@ -139,6 +140,7 @@
  * @chip: pointer to the touch panel controller
  * @in_dev: pointer to the input device structure
  * @intr_pin: interrupt pin value
+ * @regulator: pointer to the Regulator used for touch screen
  *
  * Touch panel device data structure
  */
@@ -149,6 +151,7 @@ struct bu21013_ts_data {
 	const struct bu21013_platform_device *chip;
 	struct input_dev *in_dev;
 	unsigned int intr_pin;
+	struct regulator *regulator;
 };
 
 /**
@@ -456,6 +459,16 @@ static int __devinit bu21013_probe(struct i2c_client *client,
 	bu21013_data->in_dev = in_dev;
 	bu21013_data->chip = pdata;
 	bu21013_data->client = client;
+	dev_set_name(&client->dev, pdata->name);
+
+	bu21013_data->regulator = regulator_get(&client->dev, "V-TOUCH");
+	if (IS_ERR(bu21013_data->regulator)) {
+		dev_warn(&client->dev, "regulator_get failed\n");
+		bu21013_data->regulator = NULL;
+	}
+	if (bu21013_data->regulator)
+		regulator_enable(bu21013_data->regulator);
+
 	bu21013_data->touch_stopped = false;
 	init_waitqueue_head(&bu21013_data->wait);
 
@@ -514,6 +527,10 @@ err_free_irq:
 err_cs_disable:
 	pdata->cs_dis(pdata->cs_pin);
 err_free_mem:
+	if (bu21013_data->regulator) {
+		regulator_disable(bu21013_data->regulator);
+		regulator_put(bu21013_data->regulator);
+	}
 	input_free_device(in_dev);
 	kfree(bu21013_data);
 
@@ -535,6 +552,10 @@ static int __devexit bu21013_remove(struct i2c_client *client)
 	bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin);
 
 	input_unregister_device(bu21013_data->in_dev);
+	if (bu21013_data->regulator) {
+		regulator_disable(bu21013_data->regulator);
+		regulator_put(bu21013_data->regulator);
+	}
 	kfree(bu21013_data);
 
 	device_init_wakeup(&client->dev, false);
@@ -561,6 +582,9 @@ static int bu21013_suspend(struct device *dev)
 	else
 		disable_irq(bu21013_data->chip->irq);
 
+	if (bu21013_data->regulator)
+		regulator_disable(bu21013_data->regulator);
+
 	return 0;
 }
 
@@ -577,6 +601,9 @@ static int bu21013_resume(struct device *dev)
 	struct i2c_client *client = bu21013_data->client;
 	int retval;
 
+	if (bu21013_data->regulator)
+		regulator_enable(bu21013_data->regulator);
+
 	retval = bu21013_init_chip(bu21013_data);
 	if (retval < 0) {
 		dev_err(&client->dev, "bu21013 controller config failed\n");
diff --git a/include/linux/input/bu21013.h b/include/linux/input/bu21013.h
index e470d38..ac9ed7b 100644
--- a/include/linux/input/bu21013.h
+++ b/include/linux/input/bu21013.h
@@ -9,6 +9,7 @@
 
 /**
  * struct bu21013_platform_device - Handle the platform data
+ * @name:	name of the touch panel device
  * @cs_en:	pointer to the cs enable function
  * @cs_dis:	pointer to the cs disable function
  * @irq_read_val:    pointer to read the pen irq value function
@@ -26,6 +27,7 @@
  * This is used to handle the platform data
  */
 struct bu21013_platform_device {
+	const char *name;
 	int (*cs_en)(int reset_pin);
 	int (*cs_dis)(int reset_pin);
 	int (*irq_read_val)(void);
-- 
1.7.2.dirty

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