| Message ID | 20230702174246.121656-7-dmitry.baryshkov@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | ARM: qcom: apq8064: support CPU frequency scaling | expand |
On 2.07.2023 19:42, Dmitry Baryshkov wrote: > Sometimes it might be required to scale the clock using the OPP > framework (e.g. to scale regulators following the required clock rate). > Extend the interconnec-clk framework to handle OPP case in addition to > scaling the clock. > > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > --- Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Konrad > drivers/interconnect/icc-clk.c | 13 +++++++++++-- > include/linux/interconnect-clk.h | 1 + > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/drivers/interconnect/icc-clk.c b/drivers/interconnect/icc-clk.c > index 4d43ebff4257..c7962acdcee7 100644 > --- a/drivers/interconnect/icc-clk.c > +++ b/drivers/interconnect/icc-clk.c > @@ -7,10 +7,13 @@ > #include <linux/device.h> > #include <linux/interconnect-clk.h> > #include <linux/interconnect-provider.h> > +#include <linux/pm_opp.h> > > struct icc_clk_node { > + struct device *dev; > struct clk *clk; > bool enabled; > + bool opp; > }; > > struct icc_clk_provider { > @@ -25,12 +28,16 @@ struct icc_clk_provider { > static int icc_clk_set(struct icc_node *src, struct icc_node *dst) > { > struct icc_clk_node *qn = src->data; > + unsigned long rate = icc_units_to_bps(src->peak_bw); > int ret; > > if (!qn || !qn->clk) > return 0; > > - if (!src->peak_bw) { > + if (qn->opp) > + return dev_pm_opp_set_rate(qn->dev, rate); > + > + if (!rate) { > if (qn->enabled) > clk_disable_unprepare(qn->clk); > qn->enabled = false; > @@ -45,7 +52,7 @@ static int icc_clk_set(struct icc_node *src, struct icc_node *dst) > qn->enabled = true; > } > > - return clk_set_rate(qn->clk, icc_units_to_bps(src->peak_bw)); > + return clk_set_rate(qn->clk, rate); > } > > static int icc_clk_get_bw(struct icc_node *node, u32 *avg, u32 *peak) > @@ -106,7 +113,9 @@ struct icc_provider *icc_clk_register(struct device *dev, > icc_provider_init(provider); > > for (i = 0, j = 0; i < num_clocks; i++) { > + qp->clocks[i].dev = dev; > qp->clocks[i].clk = data[i].clk; > + qp->clocks[i].opp = data[i].opp; > > node = icc_node_create(first_id + j); > if (IS_ERR(node)) { > diff --git a/include/linux/interconnect-clk.h b/include/linux/interconnect-clk.h > index 0cd80112bea5..c695e5099901 100644 > --- a/include/linux/interconnect-clk.h > +++ b/include/linux/interconnect-clk.h > @@ -11,6 +11,7 @@ struct device; > struct icc_clk_data { > struct clk *clk; > const char *name; > + bool opp; > }; > > struct icc_provider *icc_clk_register(struct device *dev,
diff --git a/drivers/interconnect/icc-clk.c b/drivers/interconnect/icc-clk.c index 4d43ebff4257..c7962acdcee7 100644 --- a/drivers/interconnect/icc-clk.c +++ b/drivers/interconnect/icc-clk.c @@ -7,10 +7,13 @@ #include <linux/device.h> #include <linux/interconnect-clk.h> #include <linux/interconnect-provider.h> +#include <linux/pm_opp.h> struct icc_clk_node { + struct device *dev; struct clk *clk; bool enabled; + bool opp; }; struct icc_clk_provider { @@ -25,12 +28,16 @@ struct icc_clk_provider { static int icc_clk_set(struct icc_node *src, struct icc_node *dst) { struct icc_clk_node *qn = src->data; + unsigned long rate = icc_units_to_bps(src->peak_bw); int ret; if (!qn || !qn->clk) return 0; - if (!src->peak_bw) { + if (qn->opp) + return dev_pm_opp_set_rate(qn->dev, rate); + + if (!rate) { if (qn->enabled) clk_disable_unprepare(qn->clk); qn->enabled = false; @@ -45,7 +52,7 @@ static int icc_clk_set(struct icc_node *src, struct icc_node *dst) qn->enabled = true; } - return clk_set_rate(qn->clk, icc_units_to_bps(src->peak_bw)); + return clk_set_rate(qn->clk, rate); } static int icc_clk_get_bw(struct icc_node *node, u32 *avg, u32 *peak) @@ -106,7 +113,9 @@ struct icc_provider *icc_clk_register(struct device *dev, icc_provider_init(provider); for (i = 0, j = 0; i < num_clocks; i++) { + qp->clocks[i].dev = dev; qp->clocks[i].clk = data[i].clk; + qp->clocks[i].opp = data[i].opp; node = icc_node_create(first_id + j); if (IS_ERR(node)) { diff --git a/include/linux/interconnect-clk.h b/include/linux/interconnect-clk.h index 0cd80112bea5..c695e5099901 100644 --- a/include/linux/interconnect-clk.h +++ b/include/linux/interconnect-clk.h @@ -11,6 +11,7 @@ struct device; struct icc_clk_data { struct clk *clk; const char *name; + bool opp; }; struct icc_provider *icc_clk_register(struct device *dev,
Sometimes it might be required to scale the clock using the OPP framework (e.g. to scale regulators following the required clock rate). Extend the interconnec-clk framework to handle OPP case in addition to scaling the clock. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/interconnect/icc-clk.c | 13 +++++++++++-- include/linux/interconnect-clk.h | 1 + 2 files changed, 12 insertions(+), 2 deletions(-)