| Message ID | 1545039990-19984-7-git-send-email-jorge.ramirez-ortiz@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Support CPU frequency scaling on QCS404 | expand |
On Mon 17 Dec 01:46 PST 2018, Jorge Ramirez-Ortiz wrote: > Allow accessing the parent clock name required for the driver > operation using the device tree node. > > This permits extending the driver to other platforms without having to > modify its source code. > > For backwards compatibility leave the previous value as default. > Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > 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> > --- > drivers/clk/qcom/hfpll.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/clk/qcom/hfpll.c b/drivers/clk/qcom/hfpll.c > index a6de7101..87b7f46 100644 > --- a/drivers/clk/qcom/hfpll.c > +++ b/drivers/clk/qcom/hfpll.c > @@ -52,6 +52,7 @@ static int qcom_hfpll_probe(struct platform_device *pdev) > void __iomem *base; > struct regmap *regmap; > struct clk_hfpll *h; > + struct clk *pclk; > struct clk_init_data init = { > .parent_names = (const char *[]){ "xo" }, > .num_parents = 1, > @@ -75,6 +76,13 @@ static int qcom_hfpll_probe(struct platform_device *pdev) > 0, &init.name)) > return -ENODEV; > > + /* get parent clock from device tree (optional) */ > + pclk = devm_clk_get(dev, "xo"); > + if (!IS_ERR(pclk)) > + init.parent_names = (const char *[]){ __clk_get_name(pclk) }; > + else if (PTR_ERR(pclk) == -EPROBE_DEFER) > + return -EPROBE_DEFER; > + > h->d = &hdata; > h->clkr.hw.init = &init; > spin_lock_init(&h->lock); > -- > 2.7.4 >
diff --git a/drivers/clk/qcom/hfpll.c b/drivers/clk/qcom/hfpll.c index a6de7101..87b7f46 100644 --- a/drivers/clk/qcom/hfpll.c +++ b/drivers/clk/qcom/hfpll.c @@ -52,6 +52,7 @@ static int qcom_hfpll_probe(struct platform_device *pdev) void __iomem *base; struct regmap *regmap; struct clk_hfpll *h; + struct clk *pclk; struct clk_init_data init = { .parent_names = (const char *[]){ "xo" }, .num_parents = 1, @@ -75,6 +76,13 @@ static int qcom_hfpll_probe(struct platform_device *pdev) 0, &init.name)) return -ENODEV; + /* get parent clock from device tree (optional) */ + pclk = devm_clk_get(dev, "xo"); + if (!IS_ERR(pclk)) + init.parent_names = (const char *[]){ __clk_get_name(pclk) }; + else if (PTR_ERR(pclk) == -EPROBE_DEFER) + return -EPROBE_DEFER; + h->d = &hdata; h->clkr.hw.init = &init; spin_lock_init(&h->lock);