ENGR00275821 imx6slevk: Set PMIC's standby voltage and rampup time

Need to set SW1AB and SW1C's standby voltage for suspend, from
1.375V -> 0.975V;

Need to increase the speed of SW1AB and SW1C ramp up time.

Signed-off-by: Anson Huang <b20788@freescale.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index c4fdd8b..4cc9604 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -177,6 +177,54 @@ static int setup_pmic_voltages(void)
 			return -1;
 		}
 		printf("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
+
+		/* set SW1AB staby volatage 0.975V */
+		if (i2c_read(0x8, 0x21, 1, &value, 1)) {
+			printf("Read SW1ABSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x21, 1, &value, 1)) {
+			printf("Set SW1ABSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x24, 1, &value, 1)) {
+			printf("Read SW1ABCONFIG error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x24, 1, &value, 1)) {
+			printf("Set SW1ABCONFIG error!\n");
+			return -1;
+		}
+
+		/* set SW1C staby volatage 0.975V */
+		if (i2c_read(0x8, 0x2f, 1, &value, 1)) {
+			printf("Read SW1CSTBY error!\n");
+			return -1;
+		}
+		value &= ~0x3f;
+		value |= 0x1b;
+		if (i2c_write(0x8, 0x2f, 1, &value, 1)) {
+			printf("Set SW1CSTBY error!\n");
+			return -1;
+		}
+
+		/* set SW1C/VDDSOC step ramp up time to from 16us to 4us/25mV */
+		if (i2c_read(0x8, 0x32, 1, &value, 1)) {
+			printf("Read SW1CCONFIG error!\n");
+			return -1;
+		}
+		value &= ~0xc0;
+		value |= 0x40;
+		if (i2c_write(0x8, 0x32, 1, &value, 1)) {
+			printf("Set SW1CCONFIG error!\n");
+			return -1;
+		}
 	}
 
 	return 0;