Commit 6cdd5b09 authored Mar 09, 2020 by Sherry Zong Committed by Sebastian Reichel Mar 11, 2020

power: reset: sc27xx: Power off the external subsystems' connection



When powering off the whole system, we should power off some external
subsystems' connection firstly, otherwise some external subsystems
will hold some power and result in powering down abnormally.

Signed-off-by: Sherry Zong <sherry.zong@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

parent 9027f611

drivers/power/reset/sc27xx-poweroff.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,8 @@

		#define SC27XX_PWR_PD_HW 0xc2c
		#define SC27XX_PWR_OFF_EN BIT(0)
		#define SC27XX_SLP_CTRL 0xdf0
		#define SC27XX_LDO_XTL_EN BIT(3)

		static struct regmap *regmap;

		@@ -40,6 +42,9 @@ static struct syscore_ops poweroff_syscore_ops = {

		static void sc27xx_poweroff_do_poweroff(void)
		{
		/* Disable the external subsys connection's power firstly */
		regmap_write(regmap, SC27XX_SLP_CTRL, SC27XX_LDO_XTL_EN);

		regmap_write(regmap, SC27XX_PWR_PD_HW, SC27XX_PWR_OFF_EN);
		}

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