From a0f5b5a3a28e5ba82515e58bf6a2209f6b7cb684 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz=20Majewski?= <l.majewski@samsung.com>
Date: Wed, 25 Apr 2012 23:30:18 +0000
Subject: [PATCH] misc:pmic:trats: Correct procedure of enabling/disabling USB
regulators
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>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
---
board/samsung/trats/trats.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c
index 08ca63d75f..a8b2b11c4c 100644
--- a/board/samsung/trats/trats.c
+++ b/board/samsung/trats/trats.c
@@ -220,6 +220,7 @@ 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))
@@ -228,11 +229,17 @@ 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);
}
--
2.39.5