linux-kernel - Re: [PATCH v9 1/4] clk: meson: add one based divider support for sclk

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Message-Id: <20220113212801.E88BFC36AE3@smtp.kernel.org>
Date:   Thu, 13 Jan 2022 13:28:00 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Liang Yang <liang.yang@...ogic.com>,
        Michael Turquette <mturquette@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Rob Herring <robh+dt@...nel.org>, linux-clk@...r.kernel.org
Cc:     Liang Yang <liang.yang@...ogic.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Victor Wan <victor.wan@...ogic.com>,
        XianWei Zhao <xianwei.zhao@...ogic.com>,
        Kelvin Zhang <kelvin.zhang@...ogic.com>,
        BiChao Zheng <bichao.zheng@...ogic.com>,
        YongHui Yu <yonghui.yu@...ogic.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v9 1/4] clk: meson: add one based divider support for sclk

Quoting Liang Yang (2022-01-13 03:57:42)
> diff --git a/drivers/clk/meson/sclk-div.c b/drivers/clk/meson/sclk-div.c
> index 76d31c0a3342..79c9efd28115 100644
> --- a/drivers/clk/meson/sclk-div.c
> +++ b/drivers/clk/meson/sclk-div.c
> @@ -28,22 +29,39 @@ meson_sclk_div_data(struct clk_regmap *clk)
>         return (struct meson_sclk_div_data *)clk->data;
>  }
>  
> -static int sclk_div_maxval(struct meson_sclk_div_data *sclk)
> +static inline int sclk_get_reg(int val, unsigned char flag)
>  {
> -       return (1 << sclk->div.width) - 1;
> +       if ((flag & MESON_SCLK_ONE_BASED) || !val)
> +               return val;
> +       else
> +               return val - 1;

Please drop the else

> +}
> +
> +static inline int sclk_get_divider(int reg, unsigned char flag)
> +{
> +       if (flag & MESON_SCLK_ONE_BASED)
> +               return reg;
> +       else

Please drop the else

> +               return reg + 1;
>  }
>  
>  static int sclk_div_maxdiv(struct meson_sclk_div_data *sclk)
>  {
> -       return sclk_div_maxval(sclk) + 1;