mfd: Convert pcf50633 to use new register map API

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 38 insertions, 80 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 21574bdf485f..13f0040413c4 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -500,6 +500,7 @@ config MFD_WM8994
 config MFD_PCF50633
         tristate "Support for NXP PCF50633"
         depends on I2C
+        select REGMAP_I2C
         help
           Say yes here if you have NXP PCF50633 chip on your board.
           This core driver provides register access and IRQ handling
diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 57868416c760..ff1a7e741ecd 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -23,45 +23,22 @@
 #include <linux/i2c.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
 
 #include <linux/mfd/pcf50633/core.h>
 
-static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
-{
-        int ret;
-
-        ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
-                                num, data);
-        if (ret < 0)
-                dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
-
-        return ret;
-}
-
-static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
-{
-        int ret;
-
-        ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
-                                num, data);
-        if (ret < 0)
-                dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
-
-        return ret;
-
-}
-
 /* Read a block of up to 32 regs  */
 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
                                         int nr_regs, u8 *data)
 {
         int ret;
 
-        mutex_lock(&pcf->lock);
-        ret = __pcf50633_read(pcf, reg, nr_regs, data);
-        mutex_unlock(&pcf->lock);
+        ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
+        if (ret != 0)
+                return ret;
 
-        return ret;
+        return nr_regs;
 }
 EXPORT_SYMBOL_GPL(pcf50633_read_block);
 
@@ -71,21 +48,22 @@ int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
 {
         int ret;
 
-        mutex_lock(&pcf->lock);
-        ret = __pcf50633_write(pcf, reg, nr_regs, data);
-        mutex_unlock(&pcf->lock);
+        ret = regmap_raw_write(pcf->regmap, reg, data, nr_regs);
+        if (ret != 0)
+                return ret;
 
-        return ret;
+        return nr_regs;
 }
 EXPORT_SYMBOL_GPL(pcf50633_write_block);
 
 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
 {
-        u8 val;
+        unsigned int val;
+        int ret;
 
-        mutex_lock(&pcf->lock);
-        __pcf50633_read(pcf, reg, 1, &val);
-        mutex_unlock(&pcf->lock);
+        ret = regmap_read(pcf->regmap, reg, &val);
+        if (ret < 0)
+                return -1;
 
         return val;
 }
@@ -93,56 +71,19 @@ EXPORT_SYMBOL_GPL(pcf50633_reg_read);
 
 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
 {
-        int ret;
-
-        mutex_lock(&pcf->lock);
-        ret = __pcf50633_write(pcf, reg, 1, &val);
-        mutex_unlock(&pcf->lock);
-
-        return ret;
+        return regmap_write(pcf->regmap, reg, val);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_write);
 
 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
 {
-        int ret;
-        u8 tmp;
-
-        val &= mask;
-
-        mutex_lock(&pcf->lock);
-        ret = __pcf50633_read(pcf, reg, 1, &tmp);
-        if (ret < 0)
-                goto out;
-
-        tmp &= ~mask;
-        tmp |= val;
-        ret = __pcf50633_write(pcf, reg, 1, &tmp);
-
-out:
-        mutex_unlock(&pcf->lock);
-
-        return ret;
+        return regmap_update_bits(pcf->regmap, reg, mask, val);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
 
 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
 {
-        int ret;
-        u8 tmp;
-
-        mutex_lock(&pcf->lock);
-        ret = __pcf50633_read(pcf, reg, 1, &tmp);
-        if (ret < 0)
-                goto out;
-
-        tmp &= ~val;
-        ret = __pcf50633_write(pcf, reg, 1, &tmp);
-
-out:
-        mutex_unlock(&pcf->lock);
-
-        return ret;
+        return regmap_update_bits(pcf->regmap, reg, val, 0);
 }
 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
 
@@ -251,6 +192,11 @@ static int pcf50633_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
 
+static struct regmap_config pcf50633_regmap_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+};
+
 static int __devinit pcf50633_probe(struct i2c_client *client,
                                 const struct i2c_device_id *ids)
 {
@@ -272,16 +218,23 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
 
         mutex_init(&pcf->lock);
 
+        pcf->regmap = regmap_init_i2c(client, &pcf50633_regmap_config);
+        if (IS_ERR(pcf->regmap)) {
+                ret = PTR_ERR(pcf->regmap);
+                dev_err(pcf->dev, "Failed to allocate register map: %d\n",
+                        ret);
+                goto err_free;
+        }
+
         i2c_set_clientdata(client, pcf);
         pcf->dev = &client->dev;
-        pcf->i2c_client = client;
 
         version = pcf50633_reg_read(pcf, 0);
         variant = pcf50633_reg_read(pcf, 1);
         if (version < 0 || variant < 0) {
                 dev_err(pcf->dev, "Unable to probe pcf50633\n");
                 ret = -ENODEV;
-                goto err_free;
+                goto err_regmap;
         }
 
         dev_info(pcf->dev, "Probed device version %d variant %d\n",
@@ -328,6 +281,8 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
 
         return 0;
 
+err_regmap:
+        regmap_exit(pcf->regmap);
 err_free:
         kfree(pcf);
 
@@ -351,6 +306,7 @@ static int __devexit pcf50633_remove(struct i2c_client *client)
         for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
                 platform_device_unregister(pcf->regulator_pdev[i]);
 
+        regmap_exit(pcf->regmap);
         kfree(pcf);
 
         return 0;
diff --git a/include/linux/mfd/pcf50633/core.h b/include/linux/mfd/pcf50633/core.h
index 50d4a047118d..a80840752b4c 100644
--- a/include/linux/mfd/pcf50633/core.h
+++ b/include/linux/mfd/pcf50633/core.h
@@ -21,6 +21,7 @@
 #include <linux/mfd/pcf50633/backlight.h>
 
 struct pcf50633;
+struct regmap;
 
 #define PCF50633_NUM_REGULATORS 11
 
@@ -134,7 +135,7 @@ enum {
 
 struct pcf50633 {
         struct device *dev;
-        struct i2c_client *i2c_client;
+        struct regmap *regmap;
 
         struct pcf50633_platform_data *pdata;
         int irq;