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

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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: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-12-09 13:45:00 +09:00
parent 6df9d38f91
commit cc1fe1e54b
1 changed files with 7 additions and 0 deletions
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7
drivers/soc/apple/apple-pmgr-pwrstate.c
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@ -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;