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 b5a0162..adbc679 100644
--- a/board/gateworks/gw_ventana/common.c
+++ b/board/gateworks/gw_ventana/common.c
@@ -1688,6 +1688,12 @@
/* 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);
}
}