[PATCH v6 09/18] clk: mediatek: Add MT8189 dbgao clock support
From: irving.ch.lin <hidden>
Date: 2026-03-09 12:05:27
Also in:
linux-arm-kernel, linux-clk, linux-devicetree, linux-mediatek, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
From: Irving-CH Lin <redacted> Add support for the MT8189 dbgao clock controller, which provides clock gate control for debug-system. Signed-off-by: Irving-CH Lin <redacted> --- drivers/clk/mediatek/Kconfig | 10 +++ drivers/clk/mediatek/Makefile | 1 + drivers/clk/mediatek/clk-mt8189-dbgao.c | 94 +++++++++++++++++++++++++ 3 files changed, 105 insertions(+) create mode 100644 drivers/clk/mediatek/clk-mt8189-dbgao.c
diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index 0665255a29fd..89f68cb56bb3 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig@@ -850,6 +850,16 @@ config COMMON_CLK_MT8189_CAM that relies on this SoC and you want to control its clocks, say Y or M to include this driver in your kernel build. +config COMMON_CLK_MT8189_DBGAO + tristate "Clock driver for MediaTek MT8189 debug ao" + depends on COMMON_CLK_MT8189 + default COMMON_CLK_MT8189 + help + Enable this to support the clock management for the debug function + on MediaTek MT8189 SoCs. This includes enabling and disabling + vcore debug system clocks. If you want to control its clocks, say Y or M + to include this driver in your kernel build. + 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 95a8f4ae05ee..eabe2cab4b8d 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile@@ -127,6 +127,7 @@ obj-$(CONFIG_COMMON_CLK_MT8189) += clk-mt8189-apmixedsys.o clk-mt8189-topckgen.o clk-mt8189-vlpckgen.o clk-mt8189-vlpcfg.o obj-$(CONFIG_COMMON_CLK_MT8189_BUS) += clk-mt8189-bus.o obj-$(CONFIG_COMMON_CLK_MT8189_CAM) += clk-mt8189-cam.o +obj-$(CONFIG_COMMON_CLK_MT8189_DBGAO) += clk-mt8189-dbgao.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-dbgao.c b/drivers/clk/mediatek/clk-mt8189-dbgao.c
new file mode 100644
index 000000000000..543321ae5e65
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8189-dbgao.c@@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 MediaTek Inc. + * Author: Qiqi Wang <qiqi.wang@mediatek.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 dbgao_cg_regs = { + .set_ofs = 0x70, + .clr_ofs = 0x70, + .sta_ofs = 0x70, +}; + +#define GATE_DBGAO(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &dbgao_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv) + +static const struct mtk_gate dbgao_clks[] = { + GATE_DBGAO(CLK_DBGAO_ATB_EN, "dbgao_atb_en", "atb_sel", 0), +}; + +static const struct mtk_clk_desc dbgao_mcd = { + .clks = dbgao_clks, + .num_clks = ARRAY_SIZE(dbgao_clks), +}; + +static const struct mtk_gate_regs dem0_cg_regs = { + .set_ofs = 0x2c, + .clr_ofs = 0x2c, + .sta_ofs = 0x2c, +}; + +static const struct mtk_gate_regs dem1_cg_regs = { + .set_ofs = 0x30, + .clr_ofs = 0x30, + .sta_ofs = 0x30, +}; + +static const struct mtk_gate_regs dem2_cg_regs = { + .set_ofs = 0x70, + .clr_ofs = 0x70, + .sta_ofs = 0x70, +}; + +#define GATE_DEM0(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &dem0_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv) + +#define GATE_DEM1(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &dem1_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv) + +#define GATE_DEM2(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &dem2_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv) + +static const struct mtk_gate dem_clks[] = { + /* DEM0 */ + GATE_DEM0(CLK_DEM_BUSCLK_EN, "dem_busclk_en", "axi_sel", 0), + /* DEM1 */ + GATE_DEM1(CLK_DEM_SYSCLK_EN, "dem_sysclk_en", "axi_sel", 0), + /* DEM2 */ + GATE_DEM2(CLK_DEM_ATB_EN, "dem_atb_en", "atb_sel", 0), +}; + +static const struct mtk_clk_desc dem_mcd = { + .clks = dem_clks, + .num_clks = ARRAY_SIZE(dem_clks), +}; + +static const struct of_device_id of_match_clk_mt8189_dbgao[] = { + { .compatible = "mediatek,mt8189-dbg-ao", .data = &dbgao_mcd }, + { .compatible = "mediatek,mt8189-dem", .data = &dem_mcd }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_match_clk_mt8189_dbgao); + +static struct platform_driver clk_mt8189_dbgao_drv = { + .probe = mtk_clk_simple_probe, + .remove = mtk_clk_simple_remove, + .driver = { + .name = "clk-mt8189-dbgao", + .of_match_table = of_match_clk_mt8189_dbgao, + }, +}; + +module_platform_driver(clk_mt8189_dbgao_drv); +MODULE_DESCRIPTION("MediaTek MT8189 dbgao system clocks driver"); +MODULE_LICENSE("GPL");
--
2.45.2