linux-kernel - Re: [PATCH 1/3] pinctrl: qcom: Update lpass variant independent functions as generic

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Date:   Thu, 7 Oct 2021 13:57:27 -0400
From:   Stephen Boyd <swboyd@...omium.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, alsa-devel@...a-project.org,
        bgoswami@...eaurora.org, bjorn.andersson@...aro.org,
        broonie@...nel.org, devicetree@...r.kernel.org,
        judyhsiao@...omium.org, lgirdwood@...il.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        perex@...ex.cz, plai@...eaurora.org, robh+dt@...nel.org,
        rohitkr@...eaurora.org, srinivas.kandagatla@...aro.org,
        tiwai@...e.com
Cc:     Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH 1/3] pinctrl: qcom: Update lpass variant independent
 functions as generic

Quoting Srinivasa Rao Mandadapu (2021-10-07 06:48:37)
> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> index 2f19ab4..c0117c5 100644
> --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> @@ -124,7 +124,8 @@ static const struct pinctrl_pin_desc sm8250_lpi_pins[] = {
>         PINCTRL_PIN(13, "gpio13"),
>  };
>
> -enum sm8250_lpi_functions {
> +

Please drop this extra newline so the diff makes sense.

> +enum lpass_lpi_functions {
>         LPI_MUX_dmic1_clk,
>         LPI_MUX_dmic1_data,
>         LPI_MUX_dmic2_clk,
> @@ -203,7 +204,7 @@ static const struct lpi_pingroup sm8250_groups[] = {
>         LPI_PINGROUP(13, NO_SLEW, dmic3_data, i2s2_data, _, _),
>  };
>
> -static const struct lpi_function sm8250_functions[] = {
> +static const struct lpi_function lpass_functions[] = {

Why not follow the approach of other qcom pinctrl drivers and make a
core driver that each SoC uses as a library?

>         LPI_FUNCTION(dmic1_clk),
>         LPI_FUNCTION(dmic1_data),
>         LPI_FUNCTION(dmic2_clk),
> @@ -615,7 +616,7 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
>                 return dev_err_probe(dev, PTR_ERR(pctrl->slew_base),
>                                      "Slew resource not provided\n");
>
> -       ret = devm_clk_bulk_get(dev, MAX_LPI_NUM_CLKS, pctrl->clks);
> +       ret = devm_clk_bulk_get_optional(dev, MAX_LPI_NUM_CLKS, pctrl->clks);

Please mention in the commit text why this is now optional.

>         if (ret)
>                 return dev_err_probe(dev, ret, "Can't get clocks\n");
>