clk: mediatek: Add MT8186 vdecsys clock support

Add MT8186 vdec clock controller which provide clock gate
control for video decoder.

Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220409132251.31725-12-chun-jie.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/Makefile

@@ -74,7 +74,7 @@ obj-$(CONFIG_COMMON_CLK_MT8183_VENCSYS) += clk-mt8183-venc.o
 obj-$(CONFIG_COMMON_CLK_MT8186) += clk-mt8186-mcu.o clk-mt8186-topckgen.o clk-mt8186-infra_ao.o \
 				   clk-mt8186-apmixedsys.o clk-mt8186-imp_iic_wrap.o \
 				   clk-mt8186-mfg.o clk-mt8186-mm.o clk-mt8186-wpe.o \
-				   clk-mt8186-img.o
+				   clk-mt8186-img.o clk-mt8186-vdec.o
 obj-$(CONFIG_COMMON_CLK_MT8192) += clk-mt8192.o
 obj-$(CONFIG_COMMON_CLK_MT8192_AUDSYS) += clk-mt8192-aud.o
 obj-$(CONFIG_COMMON_CLK_MT8192_CAMSYS) += clk-mt8192-cam.o

drivers/clk/mediatek/clk-mt8186-vdec.c

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "clk-mtk.h"
+#include "clk-gate.h"
+
+#include <dt-bindings/clock/mt8186-clk.h>
+
+static const struct mtk_gate_regs vdec0_cg_regs = {
+	.set_ofs = 0x0,
+	.clr_ofs = 0x4,
+	.sta_ofs = 0x0,
+};
+
+static const struct mtk_gate_regs vdec1_cg_regs = {
+	.set_ofs = 0x190,
+	.clr_ofs = 0x190,
+	.sta_ofs = 0x190,
+};
+
+static const struct mtk_gate_regs vdec2_cg_regs = {
+	.set_ofs = 0x200,
+	.clr_ofs = 0x204,
+	.sta_ofs = 0x200,
+};
+
+static const struct mtk_gate_regs vdec3_cg_regs = {
+	.set_ofs = 0x8,
+	.clr_ofs = 0xc,
+	.sta_ofs = 0x8,
+};
+
+#define GATE_VDEC0(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &vdec0_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+#define GATE_VDEC1(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &vdec1_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
+
+#define GATE_VDEC2(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &vdec2_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+#define GATE_VDEC3(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &vdec3_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+static const struct mtk_gate vdec_clks[] = {
+	/* VDEC0 */
+	GATE_VDEC0(CLK_VDEC_CKEN, "vdec_cken", "top_vdec", 0),
+	GATE_VDEC0(CLK_VDEC_ACTIVE, "vdec_active", "top_vdec", 4),
+	GATE_VDEC0(CLK_VDEC_CKEN_ENG, "vdec_cken_eng", "top_vdec", 8),
+	/* VDEC1 */
+	GATE_VDEC1(CLK_VDEC_MINI_MDP_CKEN_CFG_RG, "vdec_mini_mdp_cken_cfg_rg", "top_vdec", 0),
+	/* VDEC2 */
+	GATE_VDEC2(CLK_VDEC_LAT_CKEN, "vdec_lat_cken", "top_vdec", 0),
+	GATE_VDEC2(CLK_VDEC_LAT_ACTIVE, "vdec_lat_active", "top_vdec", 4),
+	GATE_VDEC2(CLK_VDEC_LAT_CKEN_ENG, "vdec_lat_cken_eng", "top_vdec", 8),
+	/* VDEC3 */
+	GATE_VDEC3(CLK_VDEC_LARB1_CKEN, "vdec_larb1_cken", "top_vdec", 0),
+};
+
+static const struct mtk_clk_desc vdec_desc = {
+	.clks = vdec_clks,
+	.num_clks = ARRAY_SIZE(vdec_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8186_vdec[] = {
+	{
+		.compatible = "mediatek,mt8186-vdecsys",
+		.data = &vdec_desc,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_driver clk_mt8186_vdec_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8186-vdec",
+		.of_match_table = of_match_clk_mt8186_vdec,
+	},
+};
+builtin_platform_driver(clk_mt8186_vdec_drv);