imx: ventana: put PFUZ100 regulators in continuous mode

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@gateworks.com>

diff --git a/board/gateworks/gw_ventana/common.c b/board/gateworks/gw_ventana/common.c
index 9f5f20f781f330b7071936f87c90d43ba8b0714a..b5a0162c5ecfd84c3d0c8931d070798e8519694d 100644 (file)
--- 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 */