s5pc210: universal: Set UVLOf as 2.55V for CP

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

diff --git a/board/samsung/universal_c210/universal.c b/board/samsung/universal_c210/universal.c
index e93f9a1..216a8fe 100644 (file)
--- a/board/samsung/universal_c210/universal.c
+++ b/board/samsung/universal_c210/universal.c
@@ -421,6 +421,8 @@ static void micro_usb_switch(int path)
 #define LP3974_REG_ONOFF4      0x14
 #define LP3974_REG_LDO7        0x21
 #define LP3974_REG_LDO17       0x29
+#define LP3974_REG_UVLO                0xB9
+#define LP3974_REG_MODCHG      0xEF
 /* ONOFF1 */
 #define LP3974_LDO3            (1 << 2)
 /* ONOFF2 */
@@ -614,6 +616,25 @@ static void init_pmic_lp3974(void)
        gpio_direction_output(&gpio2->x0, 6, 0);
        /* Use DVSINT2 for VG3D */
        gpio_direction_output(&gpio1->e2, 0, 1);
+
+       /*
+        * Default level of UVLO.
+        * UVLOf = 2.7V (0x3 << 4), UVLOr = 3.1V (0xB)
+        * set UVLOf to 2.55V (0 << 4).
+        */
+       val[0] = 0x2C;
+       i2c_write(addr, LP3974_REG_MODCHG, 1, val, 1);
+       val[0] = 0x58;
+       i2c_write(addr, LP3974_REG_MODCHG, 1, val, 1);
+       val[0] = 0xB1;
+       i2c_write(addr, LP3974_REG_MODCHG, 1, val, 1);
+
+       i2c_read_r(addr, LP3974_REG_UVLO, 1, val, 1);
+       val[0] = (val[0] & 0xf) | (0 << 4);
+       i2c_write(addr, LP3974_REG_UVLO, 1, val, 1);
+
+       val[0] = 0x00;
+       i2c_write(addr, LP3974_REG_MODCHG, 1, val, 1);
 }
 
 /*