From: Tim Harvey <tharvey@gateworks.com>
Date: Fri, 11 Jun 2021 19:46:24 +0000 (-0700)
Subject: imx: ventana: put LTC3676 regulators in continuous mode
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=0545b17b695e03ad5ea7bd9736b9cdfc49530af5;p=u-boot.git

imx: ventana: put LTC3676 regulators in continuous mode

In the default pulse-skipping mode regulators that are very lightly
loaded can fail to regulate properly. Switching them to always use
continuous mode causes only around 10mW of overall system power
difference in a lightly loaded system that isn't already operating
them in continuous mode.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---

diff --git a/board/gateworks/gw_ventana/common.c b/board/gateworks/gw_ventana/common.c
index b5a0162c5e..adbc6791b3 100644
--- a/board/gateworks/gw_ventana/common.c
+++ b/board/gateworks/gw_ventana/common.c
@@ -1688,6 +1688,12 @@ void setup_pmic(void)
 			/* set SW3 (VDD_ARM) */
 			pmic_reg_write(p, LTC3676_DVB3A, 0x1f);
 		}
+
+		/* put all switchers in continuous mode */
+		pmic_reg_write(p, LTC3676_BUCK1, 0xc0);
+		pmic_reg_write(p, LTC3676_BUCK2, 0xc0);
+		pmic_reg_write(p, LTC3676_BUCK3, 0xc0);
+		pmic_reg_write(p, LTC3676_BUCK4, 0xc0);
 	}
 }