linux-kernel - Re: [PATCH 1/7] clk: imx: clk-pll14xx: Switch to clk

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Date:   Mon, 2 Dec 2019 09:17:24 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Peng Fan <peng.fan@....com>
Cc:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        Abel Vesa <abel.vesa@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        Anson Huang <anson.huang@....com>,
        Jacky Bai <ping.bai@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Leonard Crestez <leonard.crestez@....com>
Subject: Re: [PATCH 1/7] clk: imx: clk-pll14xx: Switch to clk_hw based API

On Tue, Oct 29, 2019 at 01:40:54PM +0000, Peng Fan wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Switch the imx_clk_pll14xx function to clk_hw based API, rename
> accordingly and add a macro for clk based legacy. This allows us to
> move closer to a clear split between consumer and provider clk APIs.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/clk/imx/clk-pll14xx.c | 22 +++++++++++++---------
>  drivers/clk/imx/clk.h         |  8 ++++++--
>  2 files changed, 19 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
> index 5c458199060a..fa76e04251c4 100644
> --- a/drivers/clk/imx/clk-pll14xx.c
> +++ b/drivers/clk/imx/clk-pll14xx.c
> @@ -369,13 +369,14 @@ static const struct clk_ops clk_pll1443x_ops = {
>  	.set_rate	= clk_pll1443x_set_rate,
>  };
>  
> -struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
> -			    void __iomem *base,
> -			    const struct imx_pll14xx_clk *pll_clk)
> +struct clk_hw *imx_clk_hw_pll14xx(const char *name, const char *parent_name,
> +				  void __iomem *base,
> +				  const struct imx_pll14xx_clk *pll_clk)
>  {
>  	struct clk_pll14xx *pll;
> -	struct clk *clk;
> +	struct clk_hw *hw;
>  	struct clk_init_data init;
> +	int ret;
>  	u32 val;
>  
>  	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
> @@ -412,12 +413,15 @@ struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
>  	val &= ~BYPASS_MASK;
>  	writel_relaxed(val, pll->base + GNRL_CTL);
>  
> -	clk = clk_register(NULL, &pll->hw);
> -	if (IS_ERR(clk)) {
> -		pr_err("%s: failed to register pll %s %lu\n",
> -			__func__, name, PTR_ERR(clk));
> +	hw = &pll->hw;
> +
> +	ret = clk_hw_register(NULL, hw);
> +	if (ret) {
> +		pr_err("%s: failed to register pll %s %d\n",
> +			__func__, name, ret);
>  		kfree(pll);
> +		return ERR_PTR(ret);
>  	}
>  
> -	return clk;
> +	return hw;
>  }
> diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
> index bc5bb6ac8636..5038622f1a72 100644
> --- a/drivers/clk/imx/clk.h
> +++ b/drivers/clk/imx/clk.h
> @@ -97,8 +97,12 @@ extern struct imx_pll14xx_clk imx_1443x_pll;
>  #define imx_clk_mux(name, reg, shift, width, parents, num_parents) \
>  	imx_clk_hw_mux(name, reg, shift, width, parents, num_parents)->clk
>  
> -struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
> -		 void __iomem *base, const struct imx_pll14xx_clk *pll_clk);
> +#define imx_clk_pll14xx(name, parent_name, base, pll_clk) \
> +	imx_clk_hw_pll14xx(name, parent_name, base, pll_clk)->clk
> +

I would suggest to use an inline function for this, which will be more
readable and complying to kernel coding style.

Shawn

> +struct clk_hw *imx_clk_hw_pll14xx(const char *name, const char *parent_name,
> +				  void __iomem *base,
> +				  const struct imx_pll14xx_clk *pll_clk);
>  
>  struct clk *imx_clk_pllv1(enum imx_pllv1_type type, const char *name,
>  		const char *parent, void __iomem *base);
> -- 
> 2.16.4
>