power: twl4030: Add twl4030_i2c_read() function

Function twl4030_i2c_read() is like twl4030_i2c_read_u8() but instead of
single value it rather returns array of values.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c
index b0d5cba..f48af84 100644 (file)
--- a/drivers/power/twl4030.c
+++ b/drivers/power/twl4030.c
@@ -201,7 +201,7 @@ int twl4030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
        return 0;
 }
 
-int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
+int twl4030_i2c_read(u8 chip_no, u8 reg, u8 *valp, int len)
 {
        struct udevice *dev;
        int ret;
@@ -211,12 +211,11 @@ int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
                pr_err("unable to get I2C bus. ret %d\n", ret);
                return ret;
        }
-       ret = dm_i2c_reg_read(dev, reg);
-       if (ret < 0) {
+       ret = dm_i2c_read(dev, reg, valp, len);
+       if (ret) {
                pr_err("reading from twl4030 failed. ret %d\n", ret);
                return ret;
        }
-       *valp = (u8)ret;
        return 0;
 }
 #endif

diff --git a/include/twl4030.h b/include/twl4030.h
index c27ad61..ef05193 100644 (file)
--- a/include/twl4030.h
+++ b/include/twl4030.h
@@ -654,14 +654,20 @@ static inline int twl4030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
        return i2c_write(chip_no, reg, 1, &val, 1);
 }
 
-static inline int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *val)
+static inline int twl4030_i2c_read(u8 chip_no, u8 reg, u8 *val, int len)
 {
-       return i2c_read(chip_no, reg, 1, val, 1);
+       return i2c_read(chip_no, reg, 1, val, len);
 }
 #else
 int twl4030_i2c_write_u8(u8 chip_no, u8 reg, u8 val);
-int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *val);
+int twl4030_i2c_read(u8 chip_no, u8 reg, u8 *val, int len);
 #endif
+
+static inline int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *val)
+{
+       return twl4030_i2c_read(chip_no, reg, val, 1);
+}
+
 /*
  * Power
  */