clk: mediatek: mt8516: Convert to platform driver and simple probe

Convert the MT8516 clock drivers to be platform drivers and use the
common probe mechanism.

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/20230306140543.1813621-30-angelogioacchino.delregno@collabora.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

1 files changed, 36 insertions, 52 deletions

diff --git a/drivers/clk/mediatek/clk-mt8516.c b/drivers/clk/mediatek/clk-mt8516.c
index 51e6948cb54b..ad59e932d4aa 100644
--- a/drivers/clk/mediatek/clk-mt8516.c
+++ b/drivers/clk/mediatek/clk-mt8516.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2019 MediaTek Inc.
  * Author: James Liao <jamesjj.liao@mediatek.com>
  *         Fabien Parent <fparent@baylibre.com>
+ * Copyright (c) 2023 Collabora Ltd.
  */
 
 #include <linux/delay.h>
@@ -10,6 +11,7 @@
 #include <linux/of_address.h>
 #include <linux/slab.h>
 #include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
 
 #include "clk-gate.h"
 #include "clk-mtk.h"
@@ -638,59 +640,41 @@ static const struct mtk_gate top_clks[] __initconst = {
 	GATE_TOP5(CLK_TOP_APLL12_DIV6, "apll12_div6", "apll12_ck_div6", 8),
 };
 
-static void __init mtk_topckgen_init(struct device_node *node)
-{
-	struct clk_hw_onecell_data *clk_data;
-	int r;
-	void __iomem *base;
-
-	base = of_iomap(node, 0);
-	if (!base) {
-		pr_err("%s(): ioremap failed\n", __func__);
-		return;
-	}
+static const struct mtk_clk_desc topck_desc = {
+	.clks = top_clks,
+	.num_clks = ARRAY_SIZE(top_clks),
+	.fixed_clks = fixed_clks,
+	.num_fixed_clks = ARRAY_SIZE(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 = &mt8516_clk_lock,
+};
 
-	clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK);
+static const struct mtk_clk_desc infra_desc = {
+	.composite_clks = ifr_muxes,
+	.num_composite_clks = ARRAY_SIZE(ifr_muxes),
+	.clk_lock = &mt8516_clk_lock,
+};
 
-	mtk_clk_register_fixed_clks(fixed_clks, ARRAY_SIZE(fixed_clks),
-				    clk_data);
-	mtk_clk_register_gates(NULL, node, top_clks, ARRAY_SIZE(top_clks), clk_data);
+static const struct of_device_id of_match_clk_mt8516[] = {
+	{ .compatible = "mediatek,mt8516-topckgen", .data = &topck_desc },
+	{ .compatible = "mediatek,mt8516-infracfg", .data = &infra_desc },
+	{ /* sentinel */ }
+};
 
-	mtk_clk_register_factors(top_divs, ARRAY_SIZE(top_divs), clk_data);
-	mtk_clk_register_composites(NULL, top_muxes,
-				    ARRAY_SIZE(top_muxes), base,
-				    &mt8516_clk_lock, clk_data);
-	mtk_clk_register_dividers(top_adj_divs, ARRAY_SIZE(top_adj_divs),
-				base, &mt8516_clk_lock, clk_data);
+static struct platform_driver clk_mt8516_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8516",
+		.of_match_table = of_match_clk_mt8516,
+	},
+};
+module_platform_driver(clk_mt8516_drv);
 
-	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
-	if (r)
-		pr_err("%s(): could not register clock provider: %d\n",
-			__func__, r);
-}
-CLK_OF_DECLARE(mtk_topckgen, "mediatek,mt8516-topckgen", mtk_topckgen_init);
-
-static void __init mtk_infracfg_init(struct device_node *node)
-{
-	struct clk_hw_onecell_data *clk_data;
-	int r;
-	void __iomem *base;
-
-	base = of_iomap(node, 0);
-	if (!base) {
-		pr_err("%s(): ioremap failed\n", __func__);
-		return;
-	}
-
-	clk_data = mtk_alloc_clk_data(CLK_IFR_NR_CLK);
-
-	mtk_clk_register_composites(NULL, ifr_muxes,
-				    ARRAY_SIZE(ifr_muxes), base,
-				    &mt8516_clk_lock, clk_data);
-
-	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
-	if (r)
-		pr_err("%s(): could not register clock provider: %d\n",
-			__func__, r);
-}
-CLK_OF_DECLARE(mtk_infracfg, "mediatek,mt8516-infracfg", mtk_infracfg_init);
+MODULE_DESCRIPTION("MediaTek MT8516 clocks driver");
+MODULE_LICENSE("GPL");