Commit cc1fe1e5 authored by Hector Martin's avatar Hector Martin
Browse files

soc: apple: apple-pmgr-pwrstate: Add auto-PM min level support 



This is seemingly required for DCP/DCPEXT, without which they refuse to
boot properly. They need to be set to minimum state 4 (clock gated).

Reviewed-by: default avatarSven Peter <sven@svenpeter.dev>
Signed-off-by: default avatarHector Martin <marcan@marcan.st>
parent 6df9d38f

drivers/soc/apple/apple-pmgr-pwrstate.c

+7 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#define APPLE_PMGR_RESET        BIT(31)

#define APPLE_PMGR_AUTO_ENABLE  BIT(28)

#define APPLE_PMGR_PS_AUTO      GENMASK(27, 24)

#define APPLE_PMGR_PS_MIN       GENMASK(19, 16)

#define APPLE_PMGR_PARENT_OFF   BIT(11)

#define APPLE_PMGR_DEV_DISABLE  BIT(10)

#define APPLE_PMGR_WAS_CLKGATED BIT(9)
@@ -42,6 +43,7 @@ struct apple_pmgr_ps { 
	struct reset_controller_dev rcdev;

	struct regmap *regmap;

	u32 offset;

	u32 min_state;

};



#define genpd_to_apple_pmgr_ps(_genpd) container_of(_genpd, struct apple_pmgr_ps, genpd)
@@ -224,6 +226,11 @@ static int apple_pmgr_ps_probe(struct platform_device *pdev) 
	ps->genpd.power_on = apple_pmgr_ps_power_on;

	ps->genpd.power_off = apple_pmgr_ps_power_off;



	ret = of_property_read_u32(node, "apple,min-state", &ps->min_state);

	if (ret == 0 && ps->min_state <= APPLE_PMGR_PS_ACTIVE)

		regmap_update_bits(regmap, ps->offset, APPLE_PMGR_FLAGS | APPLE_PMGR_PS_MIN,

				   FIELD_PREP(APPLE_PMGR_PS_MIN, ps->min_state));



	active = apple_pmgr_ps_is_active(ps);

	if (of_property_read_bool(node, "apple,always-on")) {

		ps->genpd.flags |= GENPD_FLAG_ALWAYS_ON;