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@xxxxxxxxxxx>
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
(no changes since v3)
Changes in v3:
- Rename the var 'force_sync' to 'wait (Stephen)
drivers/clk/qcom/gdsc.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index 9e4d6ce891aa..5358e28122ab 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -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;
}
--
2.7.4
