diff options
| author | Jean-Jacques Hiblot <jjhiblot@ti.com> | 2017-07-12 09:42:47 (GMT) |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2017-08-01 02:58:01 (GMT) |
| commit | 5c970013a661c630ab28ddc3dd6766fe6bf83ece (patch) | |
| tree | 3b02d26a83a2e58bbc0741f2b78474461f273b93 /drivers | |
| parent | 9554a14df2e2f1eee8cbecbaa021aaaae9f457ad (diff) | |
| download | u-boot-fsl-qoriq-5c970013a661c630ab28ddc3dd6766fe6bf83ece.tar.xz | |
regulator: palmas: disable bypass when the LDO is enabled
Some LDOs have a bypass capability. Make sure that the bypass is disabled
when is the LDO is enabled (otherwise the voltage can't be changed).
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/regulator/palmas_regulator.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/power/regulator/palmas_regulator.c b/drivers/power/regulator/palmas_regulator.c index 99614b0..24a7977 100644 --- a/drivers/power/regulator/palmas_regulator.c +++ b/drivers/power/regulator/palmas_regulator.c @@ -163,6 +163,38 @@ static int palmas_smps_val(struct udevice *dev, int op, int *uV) return pmic_reg_write(dev->parent, adr, ret); } +static int palmas_ldo_bypass_enable(struct udevice *dev, bool enabled) +{ + int type = dev_get_driver_data(dev_get_parent(dev)); + struct dm_regulator_uclass_platdata *p; + unsigned int adr; + int reg; + + if (type == TPS65917) { + /* bypass available only on LDO1 and LDO2 */ + if (dev->driver_data > 2) + return -ENOTSUPP; + } else if (type == TPS659038) { + /* bypass available only on LDO9 */ + if (dev->driver_data != 9) + return -ENOTSUPP; + } + + p = dev_get_uclass_platdata(dev); + adr = p->ctrl_reg; + + reg = pmic_reg_read(dev->parent, adr); + if (reg < 0) + return reg; + + if (enabled) + reg |= PALMAS_LDO_BYPASS_EN; + else + reg &= ~PALMAS_LDO_BYPASS_EN; + + return pmic_reg_write(dev->parent, adr, reg); +} + static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable) { int ret; @@ -194,6 +226,10 @@ static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable) ret = pmic_reg_write(dev->parent, adr, ret); if (ret) return ret; + + ret = palmas_ldo_bypass_enable(dev, false); + if (ret && (ret != -ENOTSUPP)) + return ret; } return 0; |