[PATCH 14/15] clk: mediatek: Add MT8189 scp clock support

[Louis-Alexis Eyraud]

Add support for the MT8189 scp clock controller,
which provides clock gate control for System Control Processor.

Co-developed-by: Irving-CH Lin <irving-ch.lin at mediatek.com>
Signed-off-by: Irving-CH Lin <irving-ch.lin at mediatek.com>
Co-developed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud at collabora.com>
---
 drivers/clk/mediatek/Kconfig          | 10 +++++
 drivers/clk/mediatek/Makefile         |  1 +
 drivers/clk/mediatek/clk-mt8189-scp.c | 77 +++++++++++++++++++++++++++++++++++
 3 files changed, 88 insertions(+)

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index bba631138b07..919a916f1f4f 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig
@@ -872,6 +872,16 @@ config COMMON_CLK_MT8189_IIC
 	  the MT8189 chipset, improving the overall performance and power
 	  efficiency of the device.
 
+config COMMON_CLK_MT8189_SCP
+	tristate "Clock driver for MediaTek MT8189 scp"
+	depends on COMMON_CLK_MT8189
+	default COMMON_CLK_MT8189
+	help
+	  Enable this to support the clock framework for the System Control
+	  Processor (SCP) in the MediaTek MT8189 SoC. This includes clock
+	  management for SCP-related features, ensuring proper clock
+	  distribution and gating for power efficiency and functionality.
+
 config COMMON_CLK_MT8192
 	tristate "Clock driver for MediaTek MT8192"
 	depends on ARM64 || COMPILE_TEST
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index bfc075023d9b..a3a93a16b369 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -129,6 +129,7 @@ obj-$(CONFIG_COMMON_CLK_MT8189_BUS) += clk-mt8189-bus.o
 obj-$(CONFIG_COMMON_CLK_MT8189_DBGAO) += clk-mt8189-dbgao.o
 obj-$(CONFIG_COMMON_CLK_MT8189_DVFSRC) += clk-mt8189-dvfsrc.o
 obj-$(CONFIG_COMMON_CLK_MT8189_IIC) += clk-mt8189-iic.o
+obj-$(CONFIG_COMMON_CLK_MT8189_SCP) += clk-mt8189-scp.o
 obj-$(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
diff --git a/drivers/clk/mediatek/clk-mt8189-scp.c b/drivers/clk/mediatek/clk-mt8189-scp.c
new file mode 100644
index 000000000000..75197cd98b52
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8189-scp.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025-2026 MediaTek Inc.
+ *                    Qiqi Wang <qiqi.wang at mediatek.com>
+ *                    Irving-CH Lin <irving-ch.lin at mediatek.com>
+ * Copyright (C) 2026 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
+ *                    Louis-Alexis Eyraud <louisalexis.eyraud at collabora.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "clk-mtk.h"
+#include "clk-gate.h"
+
+#include <dt-bindings/clock/mediatek,mt8189-clk.h>
+
+static const struct mtk_gate_regs scp_cg_regs = {
+	.set_ofs = 0x4,
+	.clr_ofs = 0x8,
+	.sta_ofs = 0x4,
+};
+
+#define GATE_SCP(_id, _name, _parent, _shift)		\
+	GATE_MTK(_id, _name, _parent, &scp_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+static const struct mtk_gate scp_clks[] = {
+	GATE_SCP(CLK_SCP_SET_SPI0, "scp_set_spi0", "clk26m", 0),
+	GATE_SCP(CLK_SCP_SET_SPI1, "scp_set_spi1", "clk26m", 1),
+};
+
+static const struct mtk_clk_desc scp_mcd = {
+	.clks = scp_clks,
+	.num_clks = ARRAY_SIZE(scp_clks),
+};
+
+static const struct mtk_gate_regs scp_iic_cg_regs = {
+	.set_ofs = 0x8,
+	.clr_ofs = 0x4,
+	.sta_ofs = 0x0,
+};
+
+#define GATE_SCP_IIC(_id, _name, _parent, _shift)	\
+	GATE_MTK(_id, _name, _parent, &scp_iic_cg_regs, _shift, &mtk_clk_gate_ops_setclr_inv)
+
+static const struct mtk_gate scp_iic_clks[] = {
+	GATE_SCP_IIC(CLK_SCP_IIC_I2C0_W1S, "scp_iic_i2c0_w1s", "vlp_scp_iic_sel", 0),
+	GATE_SCP_IIC(CLK_SCP_IIC_I2C1_W1S, "scp_iic_i2c1_w1s", "vlp_scp_iic_sel", 1),
+};
+
+static const struct mtk_clk_desc scp_iic_mcd = {
+	.clks = scp_iic_clks,
+	.num_clks = ARRAY_SIZE(scp_iic_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8189_scp[] = {
+	{ .compatible = "mediatek,mt8189-scp-clk", .data = &scp_mcd },
+	{ .compatible = "mediatek,mt8189-scp-i2c-clk", .data = &scp_iic_mcd },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_match_clk_mt8189_scp);
+
+static struct platform_driver clk_mt8189_scp_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8189-scp",
+		.of_match_table = of_match_clk_mt8189_scp,
+	},
+};
+module_platform_driver(clk_mt8189_scp_drv);
+
+MODULE_DESCRIPTION("MediaTek MT8189 scp clocks driver");
+MODULE_LICENSE("GPL");

-- 
2.54.0