ENGR00233881 Camera mx6q_sabresd:swap VGEN5&VGEN3 to fix camera streaks issue

On mx6q_sabresd RevC board, there is camera streaks issue, after HW check, they
think there is current limit risk because VDDHIGH_IN and camera 2.8V power
share the same VGEN5, they suggest seprate them, so we use VGEN5 as VDDHIGH_IN
and use VGEN3 as camera 2.8V power supply. Also increase VDDHIG_IN from 2.8V to
3.0V to align with latest datasheet

Signed-off-by: Robin Gong <B38343@freescale.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/board/freescale/mx6q_sabresd/mx6q_sabresd.c b/board/freescale/mx6q_sabresd/mx6q_sabresd.c
index 3989b23..26a8bef 100644
--- a/board/freescale/mx6q_sabresd/mx6q_sabresd.c
+++ b/board/freescale/mx6q_sabresd/mx6q_sabresd.c
@@ -721,6 +721,33 @@ void setup_pmic_voltages(void)
 		value = 0x2d;
 		i2c_write(0x8, 0x2e, 1, &value, 1);
 
+		/*For camera streaks issue,swap VGEN5 and VGEN3 to power camera.
+		*sperate VDDHIGH_IN and camera 2.8V power supply, after switch:
+		*VGEN5 for VDDHIGH_IN and increase to 3V to align with datasheet
+		*VGEN3 for camera 2.8V power supply
+		*/
+		/*increase VGEN3 from 2.5 to 2.8V*/
+		if (i2c_read(0x8, 0x6e, 1, &value, 1)) {
+			printf("Read VGEN3 error!\n");
+			return ;
+		}
+		value &= ~0xf;
+		value |= 0xa;
+		if (i2c_write(0x8, 0x6e, 1, &value, 1)) {
+			printf("Set VGEN3 error!\n");
+			return ;
+		}
+		/*increase VGEN5 from 2.8 to 3V*/
+		if (i2c_read(0x8, 0x70, 1, &value, 1)) {
+			printf("Read VGEN5 error!\n");
+			return ;
+		}
+		value &= ~0xf;
+		value |= 0xc;
+		if (i2c_write(0x8, 0x70, 1, &value, 1)) {
+			printf("Set VGEN5 error!\n");
+			return ;
+		}
 		#if CONFIG_MX6_INTER_LDO_BYPASS
 		/*VDDCORE 1.1V@800Mhz: SW1AB*/
 		value = 0x20;