clk: mediatek: Add MT8188 mfgcfg clock support

Add MT8188 mfg clock controller which provides clock gate
control for GPU.

Signed-off-by: Garmin.Chang <Garmin.Chang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230331123621.16167-11-Garmin.Chang@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/Kconfig

@@ -713,6 +713,13 @@ config COMMON_CLK_MT8188_IPESYS
 	help
 	  This driver supports MediaTek MT8188 ipesys clocks.
 
+config COMMON_CLK_MT8188_MFGCFG
+	tristate "Clock driver for MediaTek MT8188 mfgcfg"
+	depends on COMMON_CLK_MT8188
+	default COMMON_CLK_MT8188
+	help
+	  This driver supports MediaTek MT8188 mfgcfg clocks.
+
 config COMMON_CLK_MT8192
 	tristate "Clock driver for MediaTek MT8192"
 	depends on ARM64 || COMPILE_TEST

drivers/clk/mediatek/Makefile

@@ -105,6 +105,7 @@ obj-$(CONFIG_COMMON_CLK_MT8188) += clk-mt8188-apmixedsys.o clk-mt8188-topckgen.o
 obj-$(CONFIG_COMMON_CLK_MT8188_CAMSYS) += clk-mt8188-cam.o clk-mt8188-ccu.o
 obj-$(CONFIG_COMMON_CLK_MT8188_IMGSYS) += clk-mt8188-img.o
 obj-$(CONFIG_COMMON_CLK_MT8188_IPESYS) += clk-mt8188-ipe.o
+obj-$(CONFIG_COMMON_CLK_MT8188_MFGCFG) += clk-mt8188-mfg.o
 obj-$(CONFIG_COMMON_CLK_MT8192) += clk-mt8192-apmixedsys.o clk-mt8192.o
 obj-$(CONFIG_COMMON_CLK_MT8192_AUDSYS) += clk-mt8192-aud.o
 obj-$(CONFIG_COMMON_CLK_MT8192_CAMSYS) += clk-mt8192-cam.o

drivers/clk/mediatek/clk-mt8188-mfg.c

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Garmin Chang <garmin.chang@mediatek.com>
+ */
+
+#include <dt-bindings/clock/mediatek,mt8188-clk.h>
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+
+#include "clk-gate.h"
+#include "clk-mtk.h"
+
+static const struct mtk_gate_regs mfgcfg_cg_regs = {
+	.set_ofs = 0x4,
+	.clr_ofs = 0x8,
+	.sta_ofs = 0x0,
+};
+
+#define GATE_MFG(_id, _name, _parent, _shift)				\
+	GATE_MTK_FLAGS(_id, _name, _parent, &mfgcfg_cg_regs, _shift,	\
+		       &mtk_clk_gate_ops_setclr, CLK_SET_RATE_PARENT)
+
+static const struct mtk_gate mfgcfg_clks[] = {
+	GATE_MFG(CLK_MFGCFG_BG3D, "mfgcfg_bg3d", "mfg_ck_fast_ref", 0),
+};
+
+static const struct mtk_clk_desc mfgcfg_desc = {
+	.clks = mfgcfg_clks,
+	.num_clks = ARRAY_SIZE(mfgcfg_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8188_mfgcfg[] = {
+	{ .compatible = "mediatek,mt8188-mfgcfg", .data = &mfgcfg_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_match_clk_mt8188_mfgcfg);
+
+static struct platform_driver clk_mt8188_mfgcfg_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8188-mfgcfg",
+		.of_match_table = of_match_clk_mt8188_mfgcfg,
+	},
+};
+
+module_platform_driver(clk_mt8188_mfgcfg_drv);
+MODULE_LICENSE("GPL");