clk: mediatek: Add MT8188 adsp clock support

Add MT8188 adsp clock controller which provides clock gate
control for Audio DSP.

Signed-off-by: Garmin.Chang <Garmin.Chang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230331123621.16167-20-Garmin.Chang@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/Kconfig

@@ -692,6 +692,13 @@ config COMMON_CLK_MT8188
 	help
           This driver supports MediaTek MT8188 clocks.
 
+config COMMON_CLK_MT8188_ADSP_AUDIO26M
+	tristate "Clock driver for MediaTek MT8188 adsp audio26m"
+	depends on COMMON_CLK_MT8188
+	default COMMON_CLK_MT8188
+	help
+	  This driver supports MediaTek MT8188 adsp audio26m clocks.
+
 config COMMON_CLK_MT8188_CAMSYS
 	tristate "Clock driver for MediaTek MT8188 camsys"
 	depends on COMMON_CLK_MT8188_VPPSYS

drivers/clk/mediatek/Makefile

@@ -102,6 +102,7 @@ obj-$(CONFIG_COMMON_CLK_MT8186_VENCSYS) += clk-mt8186-venc.o
 obj-$(CONFIG_COMMON_CLK_MT8186_WPESYS) += clk-mt8186-wpe.o
 obj-$(CONFIG_COMMON_CLK_MT8188) += clk-mt8188-apmixedsys.o clk-mt8188-topckgen.o \
 				   clk-mt8188-peri_ao.o clk-mt8188-infra_ao.o
+obj-$(CONFIG_COMMON_CLK_MT8188_ADSP_AUDIO26M) += clk-mt8188-adsp_audio26m.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_IMP_IIC_WRAP) += clk-mt8188-imp_iic_wrap.o

drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c

@@ -0,0 +1,48 @@
+// 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 adsp_audio26m_cg_regs = {
+	.set_ofs = 0x80,
+	.clr_ofs = 0x80,
+	.sta_ofs = 0x80,
+};
+
+#define GATE_ADSP_FLAGS(_id, _name, _parent, _shift)		\
+	GATE_MTK(_id, _name, _parent, &adsp_audio26m_cg_regs, _shift,		\
+		&mtk_clk_gate_ops_no_setclr)
+
+static const struct mtk_gate adsp_audio26m_clks[] = {
+	GATE_ADSP_FLAGS(CLK_AUDIODSP_AUDIO26M, "audiodsp_audio26m", "clk26m", 3),
+};
+
+static const struct mtk_clk_desc adsp_audio26m_desc = {
+	.clks = adsp_audio26m_clks,
+	.num_clks = ARRAY_SIZE(adsp_audio26m_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8188_adsp_audio26m[] = {
+	{ .compatible = "mediatek,mt8188-adsp-audio26m", .data = &adsp_audio26m_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, of_match_clk_mt8188_adsp_audio26m);
+
+static struct platform_driver clk_mt8188_adsp_audio26m_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8188-adsp_audio26m",
+		.of_match_table = of_match_clk_mt8188_adsp_audio26m,
+	},
+};
+module_platform_driver(clk_mt8188_adsp_audio26m_drv);
+MODULE_LICENSE("GPL");