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regulator: palmas: disable bypass when the LDO is enabled

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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>
This commit is contained in:
Jean-Jacques Hiblot 2017-07-12 11:42:47 +02:00 committed by Jaehoon Chung
parent 9554a14df2
commit 5c970013a6
2 changed files with 37 additions and 0 deletions
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36
drivers/power/regulator/palmas_regulator.c
View File

@ -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;

1
include/power/palmas.h
View File

@ -23,3 +23,4 @@
#define PALMAS_LDO_VOLT_MAX 3300000
#define PALMAS_LDO_MODE_MASK 0x1
#define PALMAS_LDO_STATUS_MASK 0x10
#define PALMAS_LDO_BYPASS_EN 0x40