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Date: Fri, 7 Dec 2018 14:04:27 +0530 From: Vivek Gautam <vivek.gautam@...eaurora.org> To: evgreen@...omium.org Cc: kishon <kishon@...com>, "robh+dt" <robh+dt@...nel.org>, Andy Gross <andy.gross@...aro.org>, Doug Anderson <dianders@...omium.org>, swboyd@...omium.org, Rob Herring <robh@...nel.org>, Can Guo <cang@...eaurora.org>, open list <linux-kernel@...r.kernel.org>, Manu Gautam <mgautam@...eaurora.org> Subject: Re: [PATCH v1 4/4] phy: qcom-qmp: Expose provided clocks to DT On Fri, Nov 30, 2018 at 3:46 AM Evan Green <evgreen@...omium.org> wrote: > > Register a simple clock provider for the PHY pipe clock sources so that > device tree users can point at these clocks via phandles to the lane > nodes. > > Signed-off-by: Evan Green <evgreen@...omium.org> > --- > > drivers/phy/qualcomm/phy-qcom-qmp.c | 23 ++++++++++++++++++++++- > 1 file changed, 22 insertions(+), 1 deletion(-) > > diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c > index 8204d55e2d650..b4006818e1b65 100644 > --- a/drivers/phy/qualcomm/phy-qcom-qmp.c > +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c > @@ -1542,6 +1542,11 @@ static int qcom_qmp_phy_clk_init(struct device *dev) > return devm_clk_bulk_get(dev, num, qmp->clks); > } > > +static void phy_pipe_clk_release_provider(void *res) > +{ > + of_clk_del_provider(res); > +} > + > /* > * Register a fixed rate pipe clock. > * > @@ -1588,7 +1593,23 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np) > fixed->fixed_rate = 125000000; > fixed->hw.init = &init; > > - return devm_clk_hw_register(qmp->dev, &fixed->hw); > + ret = devm_clk_hw_register(qmp->dev, &fixed->hw); > + if (ret) > + return ret; > + > + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &fixed->hw); > + if (ret) > + return ret; > + > + /* > + * Roll a devm action because the clock provider is the child node, but > + * the child node is not actually a device. > + */ > + ret = devm_add_action(qmp->dev, phy_pipe_clk_release_provider, np); > + if (ret) > + phy_pipe_clk_release_provider(np); > + > + return ret; > } > > static const struct phy_ops qcom_qmp_phy_gen_ops = { > -- > 2.18.1 > Tested on db820c [1] Tested-by: Vivek Gautam <vivek.gautam@...eaurora.org> [1] https://github.com/vivekgautam1/linux/tree/origin/v4.20-rc5/db820c BRs Vivek -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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