[PATCH 1/6] mfd: max8997: Initialize max8997 register map

[Pankaj Dubey <pankaj.dubey@samsung.com>]

This patch add regmap initialization to use register map
in max8997-clk device driver

CC: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
---
 drivers/mfd/max8997.c               | 14 ++++++++++++++
 include/linux/mfd/max8997-private.h |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
index 2d6e2c3..bda9ec8 100644
--- a/drivers/mfd/max8997.c
+++ b/drivers/mfd/max8997.c
@@ -175,11 +175,17 @@ static inline unsigned long max8997_i2c_get_driver_data(struct i2c_client *i2c,
 	return id->driver_data;
 }
 
+static const struct regmap_config max8997_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
 static int max8997_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct max8997_dev *max8997;
 	struct max8997_platform_data *pdata = dev_get_platdata(&i2c->dev);
+	const struct regmap_config *config = &max8997_regmap_config;
 	int ret = 0;
 
 	max8997 = devm_kzalloc(&i2c->dev, sizeof(struct max8997_dev),
@@ -202,6 +208,14 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
 	if (!pdata)
 		return ret;
 
+	max8997->regmap = devm_regmap_init_i2c(i2c, config);
+	if (IS_ERR(max8997->regmap)) {
+		ret = PTR_ERR(max8997->regmap);
+		dev_err(max8997->dev, "Failed to allocate register map: %d\n",
+				ret);
+		return ret;
+	}
+
 	max8997->pdata = pdata;
 	max8997->ono = pdata->ono;
 
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
index 78c76cd..50c7129 100644
--- a/include/linux/mfd/max8997-private.h
+++ b/include/linux/mfd/max8997-private.h
@@ -25,6 +25,7 @@
 #include <linux/i2c.h>
 #include <linux/export.h>
 #include <linux/irqdomain.h>
+#include <linux/regmap.h>
 
 #define MAX8997_REG_INVALID	(0xff)
 
@@ -388,6 +389,8 @@ struct max8997_dev {
 	struct mutex iolock;
 
 	unsigned long type;
+
+	struct regmap *regmap;
 	struct platform_device *battery; /* battery control (not fuel gauge) */
 
 	int irq;
-- 
2.7.4