linux-kernel - Re: [PATCH 5/8] reset: amlogic: add reset status support

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Message-ID: <c34a2d1613da179a27123be95eaf4ddf.sboyd@kernel.org>
Date: Wed, 10 Jul 2024 15:40:16 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Jerome Brunet <jbrunet@...libre.com>, Neil Armstrong <neil.armstrong@...aro.org>, Philipp Zabel <p.zabel@...gutronix.de>
Cc: Jerome Brunet <jbrunet@...libre.com>, Jan Dakinevich <jan.dakinevich@...utedevices.com>, linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH 5/8] reset: amlogic: add reset status support

Quoting Jerome Brunet (2024-07-10 09:25:14)
> Add a callback to check the status of the level reset, as done in
> the reset driver of the audio clock controller.

Why? Presumably so that this driver has equivalent functionality to the
reset code in the audio clk controller?

> 
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  drivers/reset/reset-meson.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c
> index 3e0447366ba6..65ba9190cb53 100644
> --- a/drivers/reset/reset-meson.c
> +++ b/drivers/reset/reset-meson.c
> @@ -69,6 +69,23 @@ static int meson_reset_level(struct reset_controller_dev *rcdev,
>                                   BIT(bit), assert ? BIT(bit) : 0);
>  }
>  
> +static int meson_reset_status(struct reset_controller_dev *rcdev,
> +                             unsigned long id)
> +{
> +       struct meson_reset *data =
> +               container_of(rcdev, struct meson_reset, rcdev);

Nitpick: One line.

> +       unsigned int val, offset, bit;
> +
> +       meson_reset_offset_and_bit(data, id, &offset, &bit);
> +       offset += data->param->level_offset;
> +
> +       regmap_read(data->map, offset, &val);
> +       val = !!(BIT(bit) & val);
> +
> +

Nitpick: Drop the extra newline?

> +       return val ^ data->param->level_low_reset;
> +}
> +
>  static int meson_reset_assert(struct reset_controller_dev *rcdev,
>                               unsigned long id)