From: Zhang Bo <bo.zhang@nxp.com>
Date: Thu, 23 Nov 2017 06:29:28 +0000 (+0800)
Subject: MA-10732[Android] Change pmic sw3 mode to avoid DDR power off
X-Git-Tag: rel_imx_4.9.88_2.0.0_ga~88
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=6ccbd3bce5fe6abb872e3dab31eac70516ad5347;p=u-boot.git

MA-10732[Android] Change pmic sw3 mode to avoid DDR power off

Write 1 to bit5 of PMIC SW3MODE(0x3f) register to change sw3 mode to avoid DDR
power off. It will avoid DRAM lose data when reset or reboot.

This feature is essental for pstore/ramoops work normally.

Change-Id: I92a1e198d57d77ae117d0d49675fc8afffec9656
Signed-off-by: Zhang Bo <bo.zhang@nxp.com>
---

diff --git a/board/freescale/mx7dsabresd/mx7dsabresd.c b/board/freescale/mx7dsabresd/mx7dsabresd.c
index 6096e3c5cd..e3b75166ec 100644
--- a/board/freescale/mx7dsabresd/mx7dsabresd.c
+++ b/board/freescale/mx7dsabresd/mx7dsabresd.c
@@ -624,6 +624,7 @@ int power_init_board(void)
 {
 	struct udevice *dev;
 	int ret, dev_id, rev_id;
+	u32 sw3mode;
 
 	ret = pmic_get("pfuze3000", &dev);
 	if (ret == -ENODEV)
@@ -637,6 +638,12 @@ int power_init_board(void)
 
 	pmic_clrsetbits(dev, PFUZE3000_LDOGCTL, 0, 1);
 
+	/* change sw3 mode to avoid DDR power off */
+	sw3mode = pmic_reg_read(dev, PFUZE3000_SW3MODE);
+	ret = pmic_reg_write(dev, PFUZE3000_SW3MODE, sw3mode | 0x20);
+	if (ret < 0)
+		printf("PMIC: PFUZE3000 change sw3 mode failed\n");
+
 	return 0;
 }
 #endif