Some GDSCs might have software control to turn them off, but we might
want to keep them enabled always, in some cases because of lack of
support in kernel to handle a graceful turning off/on of such GDSCs.
Most common instances would be the GDCSs which power up the noc/bus
fabrics, which need bus drivers to handle them and atleast support for
which is missing on all qcom SoCs.
Signed-off-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
---
drivers/clk/qcom/gdsc.c | 8 ++++++++
drivers/clk/qcom/gdsc.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index a4f3580..15f4bb5 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -291,6 +291,14 @@ static int gdsc_init(struct gdsc *sc)
if ((sc->flags & VOTABLE) && on)
gdsc_enable(&sc->pd);
+ /* If ALWAYS_ON GDSCs are not ON, turn them ON */
+ if (sc->flags & ALWAYS_ON) {
+ if (!on)
+ gdsc_enable(&sc->pd);
+ on = true;
+ sc->pd.flags |= GENPD_FLAG_ALWAYS_ON;
+ }
+
if (on || (sc->pwrsts & PWRSTS_RET))
gdsc_force_mem_on(sc);
else
diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h
index 3964834..7fd78ce 100644
--- a/drivers/clk/qcom/gdsc.h
+++ b/drivers/clk/qcom/gdsc.h
@@ -53,6 +53,7 @@ struct gdsc {
#define VOTABLE BIT(0)
#define CLAMP_IO BIT(1)
#define HW_CTRL BIT(2)
+#define ALWAYS_ON BIT(3)
struct reset_controller_dev *rcdev;
unsigned int *resets;
unsigned int reset_count;
--
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of Code Aurora Forum, hosted by The Linux Foundation
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