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Commit fb55bea1 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Stephen Boyd
Browse files

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: default avatarRajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarStephen 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;