clk: mediatek: Add MT8195 vencsys clock support

Add MT8195 vencsys clock controllers which provide clock gate
control for video encoder.

Signed-off-by: Chun-Jie Chen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

Author: Chun-Jie Chen

drivers/clk/mediatek/Makefile

@@ -84,6 +84,7 @@ obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195-apmixedsys.o clk-mt8195-topckgen.o
 				   clk-mt8195-peri_ao.o clk-mt8195-infra_ao.o \
 				   clk-mt8195-cam.o clk-mt8195-ccu.o clk-mt8195-img.o \
 				   clk-mt8195-ipe.o clk-mt8195-mfg.o clk-mt8195-scp_adsp.o \
-				   clk-mt8195-vdec.o clk-mt8195-vdo0.o clk-mt8195-vdo1.o
+				   clk-mt8195-vdec.o clk-mt8195-vdo0.o clk-mt8195-vdo1.o \
+				   clk-mt8195-venc.o
 obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
 obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o

drivers/clk/mediatek/clk-mt8195-venc.c

@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (c) 2021 MediaTek Inc.
+// Author: Chun-Jie Chen <[email protected]>
+
+#include "clk-gate.h"
+#include "clk-mtk.h"
+
+#include <dt-bindings/clock/mt8195-clk.h>
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+
+static const struct mtk_gate_regs venc_cg_regs = {
+	.set_ofs = 0x4,
+	.clr_ofs = 0x8,
+	.sta_ofs = 0x0,
+};
+
+#define GATE_VENC(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &venc_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+static const struct mtk_gate venc_clks[] = {
+	GATE_VENC(CLK_VENC_LARB, "venc_larb", "top_venc", 0),
+	GATE_VENC(CLK_VENC_VENC, "venc_venc", "top_venc", 4),
+	GATE_VENC(CLK_VENC_JPGENC, "venc_jpgenc", "top_venc", 8),
+	GATE_VENC(CLK_VENC_JPGDEC, "venc_jpgdec", "top_venc", 12),
+	GATE_VENC(CLK_VENC_JPGDEC_C1, "venc_jpgdec_c1", "top_venc", 16),
+	GATE_VENC(CLK_VENC_GALS, "venc_gals", "top_venc", 28),
+};
+
+static const struct mtk_gate venc_core1_clks[] = {
+	GATE_VENC(CLK_VENC_CORE1_LARB, "venc_core1_larb", "top_venc", 0),
+	GATE_VENC(CLK_VENC_CORE1_VENC, "venc_core1_venc", "top_venc", 4),
+	GATE_VENC(CLK_VENC_CORE1_JPGENC, "venc_core1_jpgenc", "top_venc", 8),
+	GATE_VENC(CLK_VENC_CORE1_JPGDEC, "venc_core1_jpgdec", "top_venc", 12),
+	GATE_VENC(CLK_VENC_CORE1_JPGDEC_C1, "venc_core1_jpgdec_c1", "top_venc", 16),
+	GATE_VENC(CLK_VENC_CORE1_GALS, "venc_core1_gals", "top_venc", 28),
+};
+
+static const struct mtk_clk_desc venc_desc = {
+	.clks = venc_clks,
+	.num_clks = ARRAY_SIZE(venc_clks),
+};
+
+static const struct mtk_clk_desc venc_core1_desc = {
+	.clks = venc_core1_clks,
+	.num_clks = ARRAY_SIZE(venc_core1_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8195_venc[] = {
+	{
+		.compatible = "mediatek,mt8195-vencsys",
+		.data = &venc_desc,
+	}, {
+		.compatible = "mediatek,mt8195-vencsys_core1",
+		.data = &venc_core1_desc,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_driver clk_mt8195_venc_drv = {
+	.probe = mtk_clk_simple_probe,
+	.driver = {
+		.name = "clk-mt8195-venc",
+		.of_match_table = of_match_clk_mt8195_venc,
+	},
+};
+builtin_platform_driver(clk_mt8195_venc_drv);