Commit fb55bea1 authored Mar 23, 2018 by Rajendra Nayak Committed by Stephen Boyd Jun 01, 2018

clk: qcom: gdsc: Add support for ALWAYS_ON gdscs



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@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

parent 60cc43fc

drivers/clk/qcom/gdsc.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/clk/qcom/gdsc.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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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