linux-kernel - Re: [PATCH V2 02/12] clk: mediatek: reset: Use simple reset operations

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Date:   Thu, 21 Apr 2022 11:08:02 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Rex-BC Chen <rex-bc.chen@...iatek.com>, mturquette@...libre.com,
        sboyd@...nel.org
Cc:     matthias.bgg@...il.com, p.zabel@...gutronix.de,
        chun-jie.chen@...iatek.com, wenst@...omium.org,
        runyang.chen@...iatek.com, linux-kernel@...r.kernel.org,
        allen-kh.cheng@...iatek.com, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH V2 02/12] clk: mediatek: reset: Use simple reset
 operations

Il 20/04/22 15:05, Rex-BC Chen ha scritto:
> There are two version for clock reset register control of MediaTek SoCs.
> The reset operations before MT8183 can use simple reset to cover.
> Therefore, we replace mtk_reset_ops with reset_simple_ops.
> In addition, we also rename mtk_register_reset_controller to
> mtk_register_reset_controller_simple.
> 
> Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>

Hello Rex,
have you tested this? It won't work.

reset-simple is not using regmap, and it requires you to pass a struct
reset_simple_data through drvdata.

Besides, I like that we are using regmap, while reset_simple simply uses
readl/writel... so if you want to use that driver, which is good to reduce
duplication, you should also implement support for regmap in the form of
reset_simple_regmap_ops.

Regards,
Angelo