linux-kernel - Re: [PATCH RESEND v4 2/2] gpu: drm: meson: Use devm_regulator_*get

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Message-ID: <CAG3jFytRrhzWj+ka+fSK=cQfhg83pK9ZJAH4u5aRGnCmzJAZqg@mail.gmail.com>
Date:   Tue, 29 Nov 2022 17:53:18 +0100
From:   Robert Foss <robert.foss@...aro.org>
To:     Matti Vaittinen <mazziesaccount@...il.com>
Cc:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        Jerome Brunet <jbrunet@...libre.com>
Subject: Re: [PATCH RESEND v4 2/2] gpu: drm: meson: Use devm_regulator_*get_enable*()

The prefix to the commit title is a new one, let's use an existing one:
- drm/meson: dw-hdmi:
- drm: meson: dw-hdmi:

On Wed, 16 Nov 2022 at 14:04, Matti Vaittinen <mazziesaccount@...il.com> wrote:
>
> Simplify using the devm_regulator_get_enable_optional(). Also drop the
> seemingly unused struct member 'hdmi_supply'.
>
> Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
>
> ---
> I am doing a clean-up for my local git and encountered this one.
> Respinning as it seems this one fell through the cracks.
> ---
>  drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
>  1 file changed, 3 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 5cd2b2ebbbd3..7642f740272b 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,7 +140,6 @@ struct meson_dw_hdmi {
>         struct reset_control *hdmitx_apb;
>         struct reset_control *hdmitx_ctrl;
>         struct reset_control *hdmitx_phy;
> -       struct regulator *hdmi_supply;
>         u32 irq_stat;
>         struct dw_hdmi *hdmi;
>         struct drm_bridge *bridge;
> @@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
>
>  }
>
> -static void meson_disable_regulator(void *data)
> -{
> -       regulator_disable(data);
> -}
> -
>  static void meson_disable_clk(void *data)
>  {
>         clk_disable_unprepare(data);
> @@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>         meson_dw_hdmi->data = match;
>         dw_plat_data = &meson_dw_hdmi->dw_plat_data;
>
> -       meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
> -       if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
> -               if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
> -                       return -EPROBE_DEFER;
> -               meson_dw_hdmi->hdmi_supply = NULL;
> -       } else {
> -               ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
> -               if (ret)
> -                       return ret;
> -               ret = devm_add_action_or_reset(dev, meson_disable_regulator,
> -                                              meson_dw_hdmi->hdmi_supply);
> -               if (ret)
> -                       return ret;
> -       }
> +       ret = devm_regulator_get_enable_optional(dev, "hdmi");
> +       if (ret != -ENODEV)
> +               return ret;
>
>         meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
>                                                 "hdmitx_apb");
> --
> 2.38.1
>
>
> --
> Matti Vaittinen, Linux device drivers
> ROHM Semiconductors, Finland SWDC
> Kiviharjunlenkki 1E
> 90220 OULU
> FINLAND
>
> ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
> Simon says - in Latin please.
> ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
> Thanks to Simon Glass for the translation =]