[PATCH 06/11] imx: ventana: put PFUZ100 regulators in continuous mode

Tim Harvey tharvey at gateworks.com
Fri Jun 11 21:46:23 CEST 2021


In the default 'auto' mode regulators that are very lightly loaded
can be put in PFM mode and fail to regulator properly. Switching them
to always use continuous PWM mode has a neglibable affect on system
power and garuntees proper regulation under lightly loaded circumstances.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 board/gateworks/gw_ventana/common.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/board/gateworks/gw_ventana/common.c b/board/gateworks/gw_ventana/common.c
index 9f5f20f781..b5a0162c5e 100644
--- a/board/gateworks/gw_ventana/common.c
+++ b/board/gateworks/gw_ventana/common.c
@@ -1596,6 +1596,32 @@ void setup_pmic(void)
 				pmic_reg_write(p, PFUZE100_VGEN6VOL, reg);
 			}
 		}
+
+		/* put all switchers in continuous mode */
+		pmic_reg_read(p, PFUZE100_SW1ABMODE, &reg);
+		reg &= ~(SW_MODE_MASK);
+		reg |= PWM_PWM;
+		pmic_reg_write(p, PFUZE100_SW1ABMODE, reg);
+
+		pmic_reg_read(p, PFUZE100_SW2MODE, &reg);
+		reg &= ~(SW_MODE_MASK);
+		reg |= PWM_PWM;
+		pmic_reg_write(p, PFUZE100_SW2MODE, reg);
+
+		pmic_reg_read(p, PFUZE100_SW3AMODE, &reg);
+		reg &= ~(SW_MODE_MASK);
+		reg |= PWM_PWM;
+		pmic_reg_write(p, PFUZE100_SW3AMODE, reg);
+
+		pmic_reg_read(p, PFUZE100_SW3BMODE, &reg);
+		reg &= ~(SW_MODE_MASK);
+		reg |= PWM_PWM;
+		pmic_reg_write(p, PFUZE100_SW3BMODE, reg);
+
+		pmic_reg_read(p, PFUZE100_SW4MODE, &reg);
+		reg &= ~(SW_MODE_MASK);
+		reg |= PWM_PWM;
+		pmic_reg_write(p, PFUZE100_SW4MODE, reg);
 	}
 
 	/* configure LTC3676 PMIC */
-- 
2.17.1



More information about the U-Boot mailing list