[U-Boot] [PATCH v3 1/1] mx7dsabresd: Set VLD04 output to 2.8V in PMIC initialization.

[Gautam Bhat]

This change sets the VLDO4 settings output to 2.8V in PMIC
initialization so that the MIPI DSI/CSI input voltage is 2.8V
as per the schematics. The original code provides an output of
3.3V which violates the voltage mentioned in the schematics.

Signed-off-by: Gautam Bhat <mindentropy at gmail.com>
---

Changes in v3:
- Used pmic_clrsetbits for consistency.

 board/freescale/mx7dsabresd/mx7dsabresd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/board/freescale/mx7dsabresd/mx7dsabresd.c b/board/freescale/mx7dsabresd/mx7dsabresd.c
index ecea5a529a..7d22501d26 100644
--- a/board/freescale/mx7dsabresd/mx7dsabresd.c
+++ b/board/freescale/mx7dsabresd/mx7dsabresd.c
@@ -354,6 +354,12 @@ int power_init_board(void)
 
 	pmic_clrsetbits(dev, PFUZE3000_LDOGCTL, 0, 1);
 
+	/*
+	 * Set the voltage of VLDO4 output to 2.8V which feeds
+	 * the MIPI DSI and MIPI CSI inputs.
+	 */
+	pmic_clrsetbits(dev, PFUZE3000_VLD4CTL, 0xF, 0xA);
+
 	return 0;
 }
 #endif
-- 
2.11.0