regulator: da903x: Don't read/write to DA9030_INVAL/DA9034_INVAL address

For fixed voltage, DA9030_LDO13 and DA9034_LDO5, the info->vol_reg is
DA9030_INVAL/DA9034_INVAL.
It does not make sense to read/write to DA9030_INVAL/DA9034_INVAL address.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/da903x.c b/drivers/regulator/da903x.c
index 1005f5f7e603e8f361718302d070adcfc80a236d..36c5b92fe0af26487cb093234800d534061c41f6 100644 (file)
--- a/drivers/regulator/da903x.c
+++ b/drivers/regulator/da903x.c
@@ -107,6 +107,9 @@ static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
        struct device *da9034_dev = to_da903x_dev(rdev);
        uint8_t val, mask;
 
+       if (rdev->desc->n_voltages == 1)
+               return -EINVAL;
+
        val = selector << info->vol_shift;
        mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 
@@ -120,6 +123,9 @@ static int da903x_get_voltage_sel(struct regulator_dev *rdev)
        uint8_t val, mask;
        int ret;
 
+       if (rdev->desc->n_voltages == 1)
+               return 0;
+
        ret = da903x_read(da9034_dev, info->vol_reg, &val);
        if (ret)
                return ret;