clk: mediatek: mt7622: Convert to platform driver and simple probe

Convert the MT7622 topckgen and pericfg clock drivers to platform
drivers and use the simple probe mechanism. This also allows to
build these clocks as modules.

Thanks to the conversion, more error handling was added to the clocks
registration.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230306140543.1813621-28-angelogioacchino.delregno@collabora.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-mt7622.c

@@ -490,107 +490,44 @@ static const struct mtk_clk_rst_desc clk_rst_desc = {
 	.rst_bank_nr = ARRAY_SIZE(pericfg_rst_ofs),
 };
 
-static int mtk_topckgen_init(struct platform_device *pdev)
-{
-	struct clk_hw_onecell_data *clk_data;
-	void __iomem *base;
-	struct device_node *node = pdev->dev.of_node;
-
-	base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(base))
-		return PTR_ERR(base);
-
-	clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
-
-	mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
-				    clk_data);
-
-	mtk_clk_register_factors(top_divs, ARRAY_SIZE(top_divs),
-				 clk_data);
-
-	mtk_clk_register_composites(&pdev->dev, top_muxes,
-				    ARRAY_SIZE(top_muxes), base,
-				    &mt7622_clk_lock, clk_data);
-
-	mtk_clk_register_dividers(top_adj_divs, ARRAY_SIZE(top_adj_divs),
-				  base, &mt7622_clk_lock, clk_data);
-
-	mtk_clk_register_gates(&pdev->dev, node, top_clks,
-			       ARRAY_SIZE(top_clks), clk_data);
-
-	return of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
-}
-
-static int mtk_pericfg_init(struct platform_device *pdev)
-{
-	struct clk_hw_onecell_data *clk_data;
-	void __iomem *base;
-	int r;
-	struct device_node *node = pdev->dev.of_node;
-
-	base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(base))
-		return PTR_ERR(base);
-
-	clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK);
-
-	mtk_clk_register_gates(&pdev->dev, node, peri_clks,
-			       ARRAY_SIZE(peri_clks), clk_data);
-
-	mtk_clk_register_composites(&pdev->dev, peri_muxes,
-				    ARRAY_SIZE(peri_muxes), base,
-				    &mt7622_clk_lock, clk_data);
-
-	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
-	if (r)
-		return r;
-
-	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
-
-	return 0;
-}
+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 = &mt7622_clk_lock,
+};
+
+static const struct mtk_clk_desc peri_desc = {
+	.clks = peri_clks,
+	.num_clks = ARRAY_SIZE(peri_clks),
+	.composite_clks = peri_muxes,
+	.num_composite_clks = ARRAY_SIZE(peri_muxes),
+	.rst_desc = &clk_rst_desc,
+	.clk_lock = &mt7622_clk_lock,
+};
 
 static const struct of_device_id of_match_clk_mt7622[] = {
-	{
-		.compatible = "mediatek,mt7622-topckgen",
-		.data = mtk_topckgen_init,
-	}, {
-		.compatible = "mediatek,mt7622-pericfg",
-		.data = mtk_pericfg_init,
-	}, {
-		/* sentinel */
-	}
-};
-
-static int clk_mt7622_probe(struct platform_device *pdev)
-{
-	int (*clk_init)(struct platform_device *);
-	int r;
-
-	clk_init = of_device_get_match_data(&pdev->dev);
-	if (!clk_init)
-		return -EINVAL;
-
-	r = clk_init(pdev);
-	if (r)
-		dev_err(&pdev->dev,
-			"could not register clock provider: %s: %d\n",
-			pdev->name, r);
-
-	return r;
-}
+	{ .compatible = "mediatek,mt7622-topckgen", .data = &topck_desc },
+	{ .compatible = "mediatek,mt7622-pericfg", .data = &peri_desc },
+	{ /* sentinel */ }
+};
 
 static struct platform_driver clk_mt7622_drv = {
-	.probe = clk_mt7622_probe,
 	.driver = {
 		.name = "clk-mt7622",
 		.of_match_table = of_match_clk_mt7622,
 	},
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
 };
+module_platform_driver(clk_mt7622_drv)
 
-static int clk_mt7622_init(void)
-{
-	return platform_driver_register(&clk_mt7622_drv);
-}
-
-arch_initcall(clk_mt7622_init);
+MODULE_DESCRIPTION("MediaTek MT7622 clocks driver");
+MODULE_LICENSE("GPL");