From: Rajendra Nayak Date: Fri, 23 Mar 2018 08:26:14 +0000 (+0530) Subject: clk: qcom: gdsc: Add support for ALWAYS_ON gdscs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fb55bea1fe436b2b00a8bcc0bad69c76409270e8;p=linux.git 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 Reviewed-by: Bjorn Andersson Tested-by: Srinivas Kandagatla Signed-off-by: Stephen Boyd --- diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index a4f3580587b7e..15f4bb5efd68b 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 39648348e5ec9..7fd78cec7e5b5 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;