linux-kernel - Re: [PATCH 1/4] clk: meson: mpll: add init callback and regs

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Date:   Mon, 25 Mar 2019 10:10:18 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] clk: meson: mpll: add init callback and regs

Quoting Jerome Brunet (2019-03-25 04:11:57)
> @@ -138,6 +129,27 @@ static int mpll_set_rate(struct clk_hw *hw,
>         return 0;
>  }
>  
> +static void mpll_init(struct clk_hw *hw)
> +{
> +       struct clk_regmap *clk = to_clk_regmap(hw);
> +       struct meson_clk_mpll_data *mpll = meson_clk_mpll_data(clk);
> +
> +       if (mpll->init_count)
> +               regmap_multi_reg_write(clk->map, mpll->init_regs,
> +                                      mpll->init_count);
> +
> +       /* Enable the fractional part */
> +       meson_parm_write(clk->map, &mpll->sdm_en, 1);
> +
> +       /* Set additional fractional part enable if required */
> +       if (MESON_PARM_APPLICABLE(&mpll->ssen))
> +               meson_parm_write(clk->map, &mpll->ssen, 1);
> +
> +       /* Set the magic misc bit if required */
> +       if (MESON_PARM_APPLICABLE(&mpll->misc))
> +               meson_parm_write(clk->map, &mpll->misc, 1);
> +}
> +
>  const struct clk_ops meson_clk_mpll_ro_ops = {
>         .recalc_rate    = mpll_recalc_rate,
>         .round_rate     = mpll_round_rate,
> @@ -148,6 +160,7 @@ const struct clk_ops meson_clk_mpll_ops = {
>         .recalc_rate    = mpll_recalc_rate,
>         .round_rate     = mpll_round_rate,
>         .set_rate       = mpll_set_rate,
> +       .init           = mpll_init,

We actively discourage using init callbacks. Can you do this some other
way?

>  };
>  EXPORT_SYMBOL_GPL(meson_clk_mpll_ops);
>