From 253e62bf4b118d38a9e4a396b68fac61dcae7bbc Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Mon, 12 Sep 2016 09:52:52 +0200 Subject: sunxi: axp2xx: disable ldoio0/1 at boot When cold-booting the ldoio0/1 regulators are always off / the gpios are always at tristate. But when re-booting from android these are sometimes on. Disable them at axp_init time (iow as early as possible) to remove this difference between a cold boot and a reboot. Signed-off-by: Hans de Goede Acked-by: Ian Campbell --- drivers/power/axp209.c | 16 ++++++++++++++++ drivers/power/axp221.c | 12 ++++++++++++ 2 files changed, 28 insertions(+) (limited to 'drivers/power') diff --git a/drivers/power/axp209.c b/drivers/power/axp209.c index fc162a149e..731b75e50a 100644 --- a/drivers/power/axp209.c +++ b/drivers/power/axp209.c @@ -167,6 +167,22 @@ int axp_init(void) return rc; } + /* + * Turn off LDOIO regulators / tri-state GPIO pins, when rebooting + * from android these are sometimes on. + */ + rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT); + if (rc) + return rc; + + rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT); + if (rc) + return rc; + + rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT); + if (rc) + return rc; + return 0; } diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c index 727ab09806..109d3f4686 100644 --- a/drivers/power/axp221.c +++ b/drivers/power/axp221.c @@ -223,6 +223,18 @@ int axp_init(void) if (!(axp_chip_id == 0x6 || axp_chip_id == 0x7 || axp_chip_id == 0x17)) return -ENODEV; + /* + * Turn off LDOIO regulators / tri-state GPIO pins, when rebooting + * from android these are sometimes on. + */ + ret = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT); + if (ret) + return ret; + + ret = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT); + if (ret) + return ret; + return 0; } -- cgit v1.2.3