Re: [PATCH v1 05/45] clk: mediatek: mt2712: Migrate topckgen/mcucfg to mtk_clk_simple_probe()

[Chen-Yu Tsai]

On Mon, Feb 6, 2023 at 11:29 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
>
> Now that the common mtk_clk_simple_{probe,remove}() functions can deal
> with divider clocks it is possible to migrate more clock drivers to it:
> in this case, it's about topckgen.
> While at it, also perform a fast migration for mcucfg.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>

Reviewed-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>

> ---
>  drivers/clk/mediatek/clk-mt2712.c | 127 +++++-------------------------
>  1 file changed, 21 insertions(+), 106 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-mt2712.c b/drivers/clk/mediatek/clk-mt2712.c
> index 94f8fc2a4f7b..db20c46e088b 100644
> --- a/drivers/clk/mediatek/clk-mt2712.c
> +++ b/drivers/clk/mediatek/clk-mt2712.c
> @@ -36,14 +36,11 @@ static const struct mtk_fixed_clk top_fixed_clks[] = {
>         FIXED_CLK(CLK_TOP_CVBSPLL, "cvbspll", NULL, 108000000),
>  };
>
> -static const struct mtk_fixed_factor top_early_divs[] = {
> +static const struct mtk_fixed_factor top_divs[] = {
>         FACTOR(CLK_TOP_SYS_26M, "sys_26m", "clk26m", 1,
>                 1),
>         FACTOR(CLK_TOP_CLK26M_D2, "clk26m_d2", "sys_26m", 1,
>                 2),
> -};
> -
> -static const struct mtk_fixed_factor top_divs[] = {
>         FACTOR(CLK_TOP_ARMCA35PLL, "armca35pll_ck", "armca35pll", 1,
>                 1),
>         FACTOR(CLK_TOP_ARMCA35PLL_600M, "armca35pll_600m", "armca35pll_ck", 1,
> @@ -1295,114 +1292,30 @@ static int clk_mt2712_apmixed_probe(struct platform_device *pdev)
>         return r;
>  }
>
> -static struct clk_hw_onecell_data *top_clk_data;
> -
> -static void clk_mt2712_top_init_early(struct device_node *node)
> -{
> -       int r, i;
> -
> -       if (!top_clk_data) {
> -               top_clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
> -
> -               for (i = 0; i < CLK_TOP_NR_CLK; i++)
> -                       top_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
> -       }
> -
> -       mtk_clk_register_factors(top_early_divs, ARRAY_SIZE(top_early_divs),
> -                       top_clk_data);
> -
> -       r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, top_clk_data);
> -       if (r)
> -               pr_err("%s(): could not register clock provider: %d\n",
> -                       __func__, r);
> -}
> -
> -CLK_OF_DECLARE_DRIVER(mt2712_topckgen, "mediatek,mt2712-topckgen",
> -                       clk_mt2712_top_init_early);
> -
> -static int clk_mt2712_top_probe(struct platform_device *pdev)
> -{
> -       int r, i;
> -       struct device_node *node = pdev->dev.of_node;
> -       void __iomem *base;
> -
> -       base = devm_platform_ioremap_resource(pdev, 0);
> -       if (IS_ERR(base)) {
> -               pr_err("%s(): ioremap failed\n", __func__);
> -               return PTR_ERR(base);
> -       }
> -
> -       if (!top_clk_data) {
> -               top_clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
> -       } else {
> -               for (i = 0; i < CLK_TOP_NR_CLK; i++) {
> -                       if (top_clk_data->hws[i] == ERR_PTR(-EPROBE_DEFER))
> -                               top_clk_data->hws[i] = ERR_PTR(-ENOENT);
> -               }
> -       }
> -
> -       mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
> -                       top_clk_data);
> -       mtk_clk_register_factors(top_early_divs, ARRAY_SIZE(top_early_divs),
> -                       top_clk_data);
> -       mtk_clk_register_factors(top_divs, ARRAY_SIZE(top_divs), top_clk_data);
> -       mtk_clk_register_composites(&pdev->dev, top_muxes,
> -                                   ARRAY_SIZE(top_muxes), base,
> -                                   &mt2712_clk_lock, top_clk_data);
> -       mtk_clk_register_dividers(top_adj_divs, ARRAY_SIZE(top_adj_divs), base,
> -                       &mt2712_clk_lock, top_clk_data);
> -       mtk_clk_register_gates(&pdev->dev, node, top_clks,
> -                              ARRAY_SIZE(top_clks), top_clk_data);
> -
> -       r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, top_clk_data);
> -
> -       if (r != 0)
> -               pr_err("%s(): could not register clock provider: %d\n",
> -                       __func__, r);
> -
> -       return r;
> -}
> -
> -static int clk_mt2712_mcu_probe(struct platform_device *pdev)
> -{
> -       struct clk_hw_onecell_data *clk_data;
> -       int r;
> -       struct device_node *node = pdev->dev.of_node;
> -       void __iomem *base;
> -
> -       base = devm_platform_ioremap_resource(pdev, 0);
> -       if (IS_ERR(base)) {
> -               pr_err("%s(): ioremap failed\n", __func__);
> -               return PTR_ERR(base);
> -       }
> -
> -       clk_data = mtk_alloc_clk_data(CLK_MCU_NR_CLK);
> -
> -       r = mtk_clk_register_composites(&pdev->dev, mcu_muxes,
> -                                       ARRAY_SIZE(mcu_muxes), base,
> -                                       &mt2712_clk_lock, clk_data);
> -       if (r)
> -               dev_err(&pdev->dev, "Could not register composites: %d\n", r);
> -
> -       r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
> -
> -       if (r != 0)
> -               pr_err("%s(): could not register clock provider: %d\n",
> -                       __func__, r);
> +static const struct mtk_clk_desc topck_desc = {
> +       .clks = top_clks,
> +       .num_clks = ARRAY_SIZE(top_clks),
> +       .fixed_clks = top_fixed_clks,
> +       .num_fixed_clks = ARRAY_SIZE(top_fixed_clks),
> +       .factor_clks = top_divs,
> +       .num_factor_clks = ARRAY_SIZE(top_divs),
> +       .composite_clks = top_muxes,
> +       .num_composite_clks = ARRAY_SIZE(top_muxes),
> +       .divider_clks = top_adj_divs,
> +       .num_divider_clks = ARRAY_SIZE(top_adj_divs),
> +       .clk_lock = &mt2712_clk_lock,

At some point maybe we should look into splitting up the locks to one
per block, or converting everything to regmap.

ChenYu