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clk: qcom: gdsc: Support 'synced_poweroff' genpd flag

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Add support for the newly added 'synced_poweroff' genpd flag. This allows
some clients (like adreno gpu driver) to request gdsc driver to ensure
a votable gdsc (like gpucc cx gdsc) has collapsed at hardware.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230102161757.v5.2.Ic128c1df50b7fc9a6b919932a3b41a799b5ed5e8@changeid
This commit is contained in:
Akhil P Oommen 2023-01-02 16:18:28 +05:30 committed by Bjorn Andersson
parent a9236a0aa7
commit 8b6af3b58c
1 changed files with 6 additions and 5 deletions
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11
drivers/clk/qcom/gdsc.c
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@ -136,7 +136,8 @@ static int gdsc_update_collapse_bit(struct gdsc *sc, bool val)
return 0;
}
static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status)
static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status,
bool wait)
{
int ret;
@ -149,7 +150,7 @@ static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status)
ret = gdsc_update_collapse_bit(sc, status == GDSC_OFF);
/* If disabling votable gdscs, don't poll on status */
if ((sc->flags & VOTABLE) && status == GDSC_OFF) {
if ((sc->flags & VOTABLE) && status == GDSC_OFF && !wait) {
/*
* Add a short delay here to ensure that an enable
* right after it was disabled does not put it in an
@ -275,7 +276,7 @@ static int gdsc_enable(struct generic_pm_domain *domain)
gdsc_deassert_clamp_io(sc);
}
ret = gdsc_toggle_logic(sc, GDSC_ON);
ret = gdsc_toggle_logic(sc, GDSC_ON, false);
if (ret)
return ret;
@ -352,7 +353,7 @@ static int gdsc_disable(struct generic_pm_domain *domain)
if (sc->pwrsts == PWRSTS_RET_ON)
return 0;
ret = gdsc_toggle_logic(sc, GDSC_OFF);
ret = gdsc_toggle_logic(sc, GDSC_OFF, domain->synced_poweroff);
if (ret)
return ret;
@ -392,7 +393,7 @@ static int gdsc_init(struct gdsc *sc)
/* Force gdsc ON if only ON state is supported */
if (sc->pwrsts == PWRSTS_ON) {
ret = gdsc_toggle_logic(sc, GDSC_ON);
ret = gdsc_toggle_logic(sc, GDSC_ON, false);
if (ret)
return ret;
}