| Message ID | 20190625164733.11091-6-jorge.ramirez-ortiz@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Support CPU frequency scaling on QCS404 | expand |
On Tue 25 Jun 09:47 PDT 2019, Jorge Ramirez-Ortiz wrote: > Allow accessing the parent clock names required for the driver > operation by using the device tree node. > > This permits extending the driver to other platforms without having to > modify its source code. > > For backwards compatibility leave previous values as default. > > Co-developed-by: Niklas Cassel <niklas.cassel@linaro.org> > Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> > Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > drivers/clk/qcom/apcs-msm8916.c | 23 ++++++++++++++++++++--- > 1 file changed, 20 insertions(+), 3 deletions(-) > > diff --git a/drivers/clk/qcom/apcs-msm8916.c b/drivers/clk/qcom/apcs-msm8916.c > index a6c89a310b18..dd82eb1e5202 100644 > --- a/drivers/clk/qcom/apcs-msm8916.c > +++ b/drivers/clk/qcom/apcs-msm8916.c > @@ -19,7 +19,7 @@ > > static const u32 gpll0_a53cc_map[] = { 4, 5 }; > > -static const char * const gpll0_a53cc[] = { > +static const char *gpll0_a53cc[] = { > "gpll0_vote", > "a53pll", > }; > @@ -50,6 +50,8 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) > struct regmap *regmap; > struct clk_init_data init = { }; > int ret = -ENODEV; > + const char *parents[2]; > + int pll_index = 0; > > regmap = dev_get_regmap(parent, NULL); > if (!regmap) { > @@ -61,6 +63,16 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) > if (!a53cc) > return -ENOMEM; > > + /* legacy bindings only defined the pll parent clock (index = 0) with no > + * name; when both of the parents are specified in the bindings, the > + * pll is the second one (index = 1). > + */ > + if (of_clk_parent_fill(parent->of_node, parents, 2) == 2) { > + gpll0_a53cc[0] = parents[0]; > + gpll0_a53cc[1] = parents[1]; > + pll_index = 1; > + } > + > init.name = "a53mux"; > init.parent_names = gpll0_a53cc; > init.num_parents = ARRAY_SIZE(gpll0_a53cc); > @@ -76,10 +88,11 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) > a53cc->src_shift = 8; > a53cc->parent_map = gpll0_a53cc_map; > > - a53cc->pclk = devm_clk_get(parent, NULL); > + a53cc->pclk = of_clk_get(parent->of_node, pll_index); > if (IS_ERR(a53cc->pclk)) { > ret = PTR_ERR(a53cc->pclk); > - dev_err(dev, "failed to get clk: %d\n", ret); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, "failed to get clk: %d\n", ret); > return ret; > } > > @@ -87,6 +100,7 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) > ret = clk_notifier_register(a53cc->pclk, &a53cc->clk_nb); > if (ret) { > dev_err(dev, "failed to register clock notifier: %d\n", ret); > + clk_put(a53cc->pclk); > return ret; > } > > @@ -109,6 +123,8 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) > > err: > clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb); > + clk_put(a53cc->pclk); > + > return ret; > } > > @@ -117,6 +133,7 @@ static int qcom_apcs_msm8916_clk_remove(struct platform_device *pdev) > struct clk_regmap_mux_div *a53cc = platform_get_drvdata(pdev); > > clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb); > + clk_put(a53cc->pclk); > > return 0; > } > -- > 2.21.0 >
diff --git a/drivers/clk/qcom/apcs-msm8916.c b/drivers/clk/qcom/apcs-msm8916.c index a6c89a310b18..dd82eb1e5202 100644 --- a/drivers/clk/qcom/apcs-msm8916.c +++ b/drivers/clk/qcom/apcs-msm8916.c @@ -19,7 +19,7 @@ static const u32 gpll0_a53cc_map[] = { 4, 5 }; -static const char * const gpll0_a53cc[] = { +static const char *gpll0_a53cc[] = { "gpll0_vote", "a53pll", }; @@ -50,6 +50,8 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) struct regmap *regmap; struct clk_init_data init = { }; int ret = -ENODEV; + const char *parents[2]; + int pll_index = 0; regmap = dev_get_regmap(parent, NULL); if (!regmap) { @@ -61,6 +63,16 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) if (!a53cc) return -ENOMEM; + /* legacy bindings only defined the pll parent clock (index = 0) with no + * name; when both of the parents are specified in the bindings, the + * pll is the second one (index = 1). + */ + if (of_clk_parent_fill(parent->of_node, parents, 2) == 2) { + gpll0_a53cc[0] = parents[0]; + gpll0_a53cc[1] = parents[1]; + pll_index = 1; + } + init.name = "a53mux"; init.parent_names = gpll0_a53cc; init.num_parents = ARRAY_SIZE(gpll0_a53cc); @@ -76,10 +88,11 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) a53cc->src_shift = 8; a53cc->parent_map = gpll0_a53cc_map; - a53cc->pclk = devm_clk_get(parent, NULL); + a53cc->pclk = of_clk_get(parent->of_node, pll_index); if (IS_ERR(a53cc->pclk)) { ret = PTR_ERR(a53cc->pclk); - dev_err(dev, "failed to get clk: %d\n", ret); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to get clk: %d\n", ret); return ret; } @@ -87,6 +100,7 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) ret = clk_notifier_register(a53cc->pclk, &a53cc->clk_nb); if (ret) { dev_err(dev, "failed to register clock notifier: %d\n", ret); + clk_put(a53cc->pclk); return ret; } @@ -109,6 +123,8 @@ static int qcom_apcs_msm8916_clk_probe(struct platform_device *pdev) err: clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb); + clk_put(a53cc->pclk); + return ret; } @@ -117,6 +133,7 @@ static int qcom_apcs_msm8916_clk_remove(struct platform_device *pdev) struct clk_regmap_mux_div *a53cc = platform_get_drvdata(pdev); clk_notifier_unregister(a53cc->pclk, &a53cc->clk_nb); + clk_put(a53cc->pclk); return 0; }