Re: [PATCH v3 17/31] clk: mediatek: Implement mtk_clk_unregister_divider_clks() API

[Chun-Jie Chen]

On Tue, 2022-02-08 at 20:40 +0800, Chen-Yu Tsai wrote:
> mtk_clk_register_divider_clks(), as the name suggests, is used to
> register
> a given list of divider clks. However it is lacking a counterpart
> unregister API.
> 
> Implement said unregister API so that the various clock platform
> drivers
> can utilize it to do proper unregistration, cleanup and removal.
> 
> In the header file, the register function's declaration is also
> reformatted to fit code style guidelines.
> 
> Signed-off-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
> Reviewed-by: Miles Chen <miles.chen@xxxxxxxxxxxx>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@xxxxxxxxxxxxx>

Reviewed-by: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
> ---
>  drivers/clk/mediatek/clk-mtk.c | 19 +++++++++++++++++++
>  drivers/clk/mediatek/clk-mtk.h |  8 +++++---
>  2 files changed, 24 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/mediatek/clk-mtk.c
> b/drivers/clk/mediatek/clk-mtk.c
> index b267b2f04b84..3a6dfe445e63 100644
> --- a/drivers/clk/mediatek/clk-mtk.c
> +++ b/drivers/clk/mediatek/clk-mtk.c
> @@ -286,6 +286,25 @@ void mtk_clk_register_dividers(const struct
> mtk_clk_divider *mcds,
>  	}
>  }
>  
> +void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds,
> int num,
> +				 struct clk_onecell_data *clk_data)
> +{
> +	int i;
> +
> +	if (!clk_data)
> +		return;
> +
> +	for (i = num; i > 0; i--) {
> +		const struct mtk_clk_divider *mcd = &mcds[i - 1];
> +
> +		if (IS_ERR_OR_NULL(clk_data->clks[mcd->id]))
> +			continue;
> +
> +		clk_unregister_divider(clk_data->clks[mcd->id]);
> +		clk_data->clks[mcd->id] = ERR_PTR(-ENOENT);
> +	}
> +}
> +
>  int mtk_clk_simple_probe(struct platform_device *pdev)
>  {
>  	const struct mtk_clk_desc *mcd;
> diff --git a/drivers/clk/mediatek/clk-mtk.h
> b/drivers/clk/mediatek/clk-mtk.h
> index 4db1a97c1250..e3ae22fb0334 100644
> --- a/drivers/clk/mediatek/clk-mtk.h
> +++ b/drivers/clk/mediatek/clk-mtk.h
> @@ -176,9 +176,11 @@ struct mtk_clk_divider {
>  		.div_width = _width,				\
>  }
>  
> -void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
> -			int num, void __iomem *base, spinlock_t *lock,
> -				struct clk_onecell_data *clk_data);
> +void mtk_clk_register_dividers(const struct mtk_clk_divider *mcds,
> int num,
> +			       void __iomem *base, spinlock_t *lock,
> +			       struct clk_onecell_data *clk_data);
> +void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds,
> int num,
> +				 struct clk_onecell_data *clk_data);
>  
>  struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num);
>  void mtk_free_clk_data(struct clk_onecell_data *clk_data);