In the MAX8997, LDO regulators needs to preserve previously set voltage values.
Signed-off-by: Lukasz Majewski l.majewski@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com Cc: Minkyu Kang mk7.kang@samsung.com --- board/samsung/trats/trats.c | 15 +++++++++++---- 1 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c index 10cf5b3..a20268d 100644 --- a/board/samsung/trats/trats.c +++ b/board/samsung/trats/trats.c @@ -218,6 +218,7 @@ int board_mmc_init(bd_t *bis) static int s5pc210_phy_control(int on) { int ret = 0; + u32 val = 0; struct pmic *p = get_pmic();
if (pmic_probe(p)) @@ -226,11 +227,17 @@ static int s5pc210_phy_control(int on) if (on) { ret |= pmic_set_output(p, MAX8997_REG_SAFEOUTCTRL, ENSAFEOUT1, LDO_ON); - ret |= pmic_reg_write(p, MAX8997_REG_LDO3CTRL, EN_LDO); - ret |= pmic_reg_write(p, MAX8997_REG_LDO8CTRL, EN_LDO); + ret |= pmic_reg_read(p, MAX8997_REG_LDO3CTRL, &val); + ret |= pmic_reg_write(p, MAX8997_REG_LDO3CTRL, EN_LDO | val); + + ret |= pmic_reg_read(p, MAX8997_REG_LDO8CTRL, &val); + ret |= pmic_reg_write(p, MAX8997_REG_LDO8CTRL, EN_LDO | val); } else { - ret |= pmic_reg_write(p, MAX8997_REG_LDO8CTRL, DIS_LDO); - ret |= pmic_reg_write(p, MAX8997_REG_LDO3CTRL, DIS_LDO); + ret |= pmic_reg_read(p, MAX8997_REG_LDO8CTRL, &val); + ret |= pmic_reg_write(p, MAX8997_REG_LDO8CTRL, DIS_LDO | val); + + ret |= pmic_reg_read(p, MAX8997_REG_LDO3CTRL, &val); + ret |= pmic_reg_write(p, MAX8997_REG_LDO3CTRL, DIS_LDO | val); ret |= pmic_set_output(p, MAX8997_REG_SAFEOUTCTRL, ENSAFEOUT1, LDO_OFF); }