linux-kernel - Re: [PATCH v6 05/18] clk: qcom: kpss-xcc: convert to parent data API

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Message-Id: <20220325010652.B1A90C340EC@smtp.kernel.org>
Date:   Thu, 24 Mar 2022 18:06:50 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Andy Gross <agross@...nel.org>,
        Ansuel Smith <ansuelsmth@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 05/18] clk: qcom: kpss-xcc: convert to parent data API

Quoting Ansuel Smith (2022-03-21 16:15:35)
> Convert the driver to parent data API. From the Documentation pll8_vote
> and pxo should be declared in the DTS so fw_name can be used instead of
> parent_names. Name is still used to save regression on old definition.
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>  drivers/clk/qcom/kpss-xcc.c | 25 ++++++++-----------------
>  1 file changed, 8 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/clk/qcom/kpss-xcc.c b/drivers/clk/qcom/kpss-xcc.c
> index 4fec1f9142b8..347f70e9f5fe 100644
> --- a/drivers/clk/qcom/kpss-xcc.c
> +++ b/drivers/clk/qcom/kpss-xcc.c
> @@ -12,9 +12,9 @@
>  #include <linux/clk.h>
>  #include <linux/clk-provider.h>
>  
> -static const char *aux_parents[] = {
> -       "pll8_vote",
> -       "pxo",
> +static const struct clk_parent_data aux_parents[] = {
> +       { .name = "pll8_vote", .fw_name = "pll8_vote" },
> +       { .name = "pxo", .fw_name = "pxo" },
>  };
>  
>  static unsigned int aux_parent_map[] = {
> @@ -32,8 +32,8 @@ MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
>  static int kpss_xcc_driver_probe(struct platform_device *pdev)
>  {
>         const struct of_device_id *id;
> -       struct clk *clk;
>         void __iomem *base;
> +       struct clk_hw *hw;
>         const char *name;
>  
>         id = of_match_device(kpss_xcc_match_table, &pdev->dev);
> @@ -55,24 +55,15 @@ static int kpss_xcc_driver_probe(struct platform_device *pdev)
>                 base += 0x28;
>         }
>  
> -       clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
> -                                    ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
> -                                    0, aux_parent_map, NULL);
> +       hw = __devm_clk_hw_register_mux(&pdev->dev, NULL, name, ARRAY_SIZE(aux_parents),

Does something in devm_clk_hw_register_mux() not work here? Do we need a
devm_clk_hw_register_mux_parent_data()? If so, please add it.

> +                                       NULL, NULL, aux_parents, 0, base, 0, 0x3,
> +                                       0, aux_parent_map, NULL);
>