clk: mediatek: Add MT8195 scp adsp clock support

Add MT8195 scp adsp clock controller which provides clock gate
control for Audio DSP.

Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20210914021633.26377-16-chun-jie.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/Makefile

@@ -83,6 +83,6 @@ obj-$(CONFIG_COMMON_CLK_MT8192_VENCSYS) += clk-mt8192-venc.o
 obj-$(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-ipe.o clk-mt8195-mfg.o clk-mt8195-scp_adsp.o
 obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
 obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o

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

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (c) 2021 MediaTek Inc.
+// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
+
+#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 scp_adsp_cg_regs = {
+	.set_ofs = 0x180,
+	.clr_ofs = 0x180,
+	.sta_ofs = 0x180,
+};
+
+#define GATE_SCP_ADSP(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &scp_adsp_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr)
+
+static const struct mtk_gate scp_adsp_clks[] = {
+	GATE_SCP_ADSP(CLK_SCP_ADSP_AUDIODSP, "scp_adsp_audiodsp", "top_adsp", 0),
+};
+
+static const struct mtk_clk_desc scp_adsp_desc = {
+	.clks = scp_adsp_clks,
+	.num_clks = ARRAY_SIZE(scp_adsp_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8195_scp_adsp[] = {
+	{
+		.compatible = "mediatek,mt8195-scp_adsp",
+		.data = &scp_adsp_desc,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_driver clk_mt8195_scp_adsp_drv = {
+	.probe = mtk_clk_simple_probe,
+	.driver = {
+		.name = "clk-mt8195-scp_adsp",
+		.of_match_table = of_match_clk_mt8195_scp_adsp,
+	},
+};
+builtin_platform_driver(clk_mt8195_scp_adsp_drv);