diff options
| author | Hector Martin <marcan@marcan.st> | 2021-12-09 13:45:00 +0900 |
|---|---|---|
| committer | Hector Martin <marcan@marcan.st> | 2021-12-12 10:32:10 +0900 |
| commit | cc1fe1e54ba565aaec0006796db65b7c3b1ccd69 (patch) | |
| tree | ce66b354d9b2bc8fe2d74029184d6d4446b07290 /drivers/soc | |
| parent | 6df9d38f9146e83b473f0c9e57fb5fdf3fcc93e2 (diff) | |
| download | lwn-cc1fe1e54ba565aaec0006796db65b7c3b1ccd69.tar.gz lwn-cc1fe1e54ba565aaec0006796db65b7c3b1ccd69.zip | |
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: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/apple/apple-pmgr-pwrstate.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/soc/apple/apple-pmgr-pwrstate.c b/drivers/soc/apple/apple-pmgr-pwrstate.c index 8ad9d5fdefbf..e1122288409a 100644 --- a/drivers/soc/apple/apple-pmgr-pwrstate.c +++ b/drivers/soc/apple/apple-pmgr-pwrstate.c @@ -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; |