linux-kernel - Re: [PATCH v2 2/2] pinctrl: qcom: sc7280: Add lpi pinctrl variant data for adsp based targets

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Message-ID: <CACRpkdYQW7WByaGoSFKT91OwRao_jJdCAbL0pUuj3vdS6TdkQg@mail.gmail.com>
Date:   Fri, 3 Jun 2022 12:28:45 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Cc:     agross@...nel.org, bjorn.andersson@...aro.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,
        linux-gpio@...r.kernel.org,
        Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH v2 2/2] pinctrl: qcom: sc7280: Add lpi pinctrl variant
 data for adsp based targets

On Wed, Jun 1, 2022 at 12:30 PM Srinivasa Rao Mandadapu
<quic_srivasam@...cinc.com> wrote:

So one way to just use a propert and avoid more compatible strings:

> Add compatible string and lpi pinctrl variant data structure for adsp
> enabled sc7280 platforms.
> This variant data structure rnd compatible name required for
> distingushing ADSP based platforms and ADSP bypass platforms.
> In case of ADSP enabled platforms, where audio is routed through ADSP
> macro and decodec GDSC Switches are triggered as clocks by pinctrl
> driver and ADSP firmware controls them. So It's mandatory to enable
> them in ADSP based solutions.
> In case of ADSP bypass platforms clock voting is optional as these macro
> and dcodec GDSC switches are maintained as power domains and operated from
> lpass clock drivers.
>
> 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 = {

Remove static and export this struct in drivers/pinctrl/qcom/pinctrl-lpass-lpi.h

> +       .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,
> +       },

Drop this and instead add some code in the probe()
in drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
lines:

if (of_device_is_compatible(np, "qcom,sc7280-lpass-lpi-pinctrl") &&
of_property_read_bool(np, "qcom,adsp-mode))
     data = &sc7280_adsp_lpi_data;

Yours,
Linus Walleij