linux-kernel - Re: [PATCH v5 33/54] clk: mediatek: mt7986-infracfg: Migrate to common probe mechanism

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Date:   Wed, 22 Feb 2023 18:02:53 +0000
From:   Daniel Golle <daniel@...rotopia.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     mturquette@...libre.com, sboyd@...nel.org, matthias.bgg@...il.com,
        wenst@...omium.org, johnson.wang@...iatek.com,
        miles.chen@...iatek.com, chun-jie.chen@...iatek.com,
        fparent@...libre.com, msp@...libre.com, nfraprado@...labora.com,
        rex-bc.chen@...iatek.com, zhaojh329@...il.com,
        sam.shih@...iatek.com, edward-jw.yang@...iatek.com,
        yangyingliang@...wei.com, granquet@...libre.com,
        pablo.sun@...iatek.com, sean.wang@...iatek.com,
        chen.zhong@...iatek.com, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v5 33/54] clk: mediatek: mt7986-infracfg: Migrate to
 common probe mechanism

On Wed, Feb 22, 2023 at 10:25:22AM +0100, AngeloGioacchino Del Regno wrote:
> Convert this driver to use the common mtk_clk_simple_probe() mechanism.
> While at it, also use module_platform_driver() instead, as this driver
> just gained a .remove() callback during the conversion.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>

Tested-by: Daniel Golle <daniel@...rotopia.org>
(on BananaPi BPi-R3)

> ---
>  drivers/clk/mediatek/clk-mt7986-infracfg.c | 61 ++++++----------------
>  1 file changed, 17 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mt7986-infracfg.c b/drivers/clk/mediatek/clk-mt7986-infracfg.c
> index 0a4bf87ee160..0299faad0733 100644
> --- a/drivers/clk/mediatek/clk-mt7986-infracfg.c
> +++ b/drivers/clk/mediatek/clk-mt7986-infracfg.c
> @@ -157,57 +157,30 @@ static const struct mtk_gate infra_clks[] = {
>  	GATE_INFRA2(CLK_INFRA_IPCIEB_CK, "infra_ipcieb", "sysaxi_sel", 15),
>  };
>  
> -static int clk_mt7986_infracfg_probe(struct platform_device *pdev)
> -{
> -	struct clk_hw_onecell_data *clk_data;
> -	struct device_node *node = pdev->dev.of_node;
> -	int r;
> -	void __iomem *base;
> -	int nr = ARRAY_SIZE(infra_divs) + ARRAY_SIZE(infra_muxes) +
> -		 ARRAY_SIZE(infra_clks);
> -
> -	base = of_iomap(node, 0);
> -	if (!base) {
> -		pr_err("%s(): ioremap failed\n", __func__);
> -		return -ENOMEM;
> -	}
> -
> -	clk_data = mtk_alloc_clk_data(nr);
> -
> -	if (!clk_data)
> -		return -ENOMEM;
> -
> -	mtk_clk_register_factors(infra_divs, ARRAY_SIZE(infra_divs), clk_data);
> -	mtk_clk_register_muxes(&pdev->dev, infra_muxes,
> -			       ARRAY_SIZE(infra_muxes), node,
> -			       &mt7986_clk_lock, clk_data);
> -	mtk_clk_register_gates(&pdev->dev, node, infra_clks,
> -			       ARRAY_SIZE(infra_clks), clk_data);
> -
> -	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
> -	if (r) {
> -		pr_err("%s(): could not register clock provider: %d\n",
> -		       __func__, r);
> -		goto free_infracfg_data;
> -	}
> -	return r;
> -
> -free_infracfg_data:
> -	mtk_free_clk_data(clk_data);
> -	return r;
> -
> -}
> +static const struct mtk_clk_desc infra_desc = {
> +	.clks = infra_clks,
> +	.num_clks = ARRAY_SIZE(infra_clks),
> +	.factor_clks = infra_divs,
> +	.num_factor_clks = ARRAY_SIZE(infra_divs),
> +	.mux_clks = infra_muxes,
> +	.num_mux_clks = ARRAY_SIZE(infra_muxes),
> +	.clk_lock = &mt7986_clk_lock,
> +};
>  
>  static const struct of_device_id of_match_clk_mt7986_infracfg[] = {
> -	{ .compatible = "mediatek,mt7986-infracfg", },
> -	{}
> +	{ .compatible = "mediatek,mt7986-infracfg", .data = &infra_desc },
> +	{ /* sentinel */ }
>  };
>  
>  static struct platform_driver clk_mt7986_infracfg_drv = {
> -	.probe = clk_mt7986_infracfg_probe,
>  	.driver = {
>  		.name = "clk-mt7986-infracfg",
>  		.of_match_table = of_match_clk_mt7986_infracfg,
>  	},
> +	.probe = mtk_clk_simple_probe,
> +	.remove = mtk_clk_simple_remove,
>  };
> -builtin_platform_driver(clk_mt7986_infracfg_drv);
> +module_platform_driver(clk_mt7986_infracfg_drv);
> +
> +MODULE_DESCRIPTION("MediaTek MT7986 infracfg clocks driver");
> +MODULE_LICENSE("GPL");
> -- 
> 2.39.2
> 
>