linux-kernel - Re: [PATCH 2/2] pinctrl: qcom: sc7280: Add lpi pinctrl variant data structure for adsp based targets

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Date:   Mon, 16 May 2022 08:17:44 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Cc:     agross@...nel.org, lgirdwood@...il.com, broonie@...nel.org,
        robh+dt@...nel.org, quic_plai@...cinc.com, bgoswami@...cinc.com,
        perex@...ex.cz, tiwai@...e.com, srinivas.kandagatla@...aro.org,
        quic_rohkumar@...cinc.com, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org, Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org,
        Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH 2/2] pinctrl: qcom: sc7280: Add lpi pinctrl variant data
 structure for adsp based targets

On Wed 04 May 06:56 PDT 2022, Srinivasa Rao Mandadapu wrote:

> Add compatible string and lpi pinctrl variant data structure for adsp enabled
> sc7280 platforms.

This says what the change does, but gives no clue to what this
compatible represents and why the clock is not optional.

Could you please describe here what scenario this compatible is to be
used for etc, so that when someone else adds support for the next
platform they can use the git history to understand which case to
follow.

Thanks,
Bjorn

> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Co-developed-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> Signed-off-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
> ---
>  drivers/pinctrl/qcom/pinctrl-sc7280-lpass-lpi.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-sc7280-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-sc7280-lpass-lpi.c
> index 2add9a4..c9e85d9 100644
> --- a/drivers/pinctrl/qcom/pinctrl-sc7280-lpass-lpi.c
> +++ b/drivers/pinctrl/qcom/pinctrl-sc7280-lpass-lpi.c
> @@ -134,6 +134,16 @@ static const struct lpi_function sc7280_functions[] = {
>  	LPI_FUNCTION(wsa_swr_data),
>  };
>  
> +static const struct lpi_pinctrl_variant_data sc7280_adsp_lpi_data = {
> +	.pins = sc7280_lpi_pins,
> +	.npins = ARRAY_SIZE(sc7280_lpi_pins),
> +	.groups = sc7280_groups,
> +	.ngroups = ARRAY_SIZE(sc7280_groups),
> +	.functions = sc7280_functions,
> +	.nfunctions = ARRAY_SIZE(sc7280_functions),
> +	.is_clk_optional = false,
> +};
> +
>  static const struct lpi_pinctrl_variant_data sc7280_lpi_data = {
>  	.pins = sc7280_lpi_pins,
>  	.npins = ARRAY_SIZE(sc7280_lpi_pins),
> @@ -149,6 +159,10 @@ static const struct of_device_id lpi_pinctrl_of_match[] = {
>  	       .compatible = "qcom,sc7280-lpass-lpi-pinctrl",
>  	       .data = &sc7280_lpi_data,
>  	},
> +	{
> +		.compatible = "qcom,sc7280-lpass-adsp-lpi-pinctrl",
> +		.data = &sc7280_adsp_lpi_data,
> +	},
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, lpi_pinctrl_of_match);
> -- 
> 2.7.4
>