[PATCH v6 17/27] clk: mediatek: Add MT8196 I2C clock support

Laura Nao
2025-09-15T15:22:21Z

Add support for the MT8196 I2C clock controller, which provides clock
gate control for I2C.

Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Laura Nao <laura.nao@collabora.com>
---
drivers/clk/mediatek/Kconfig | 7 ++
drivers/clk/mediatek/Makefile | 1 +
.../clk/mediatek/clk-mt8196-imp_iic_wrap.c | 118 ++++++++++++++++++
3 files changed, 126 insertions(+)
create mode 100644 drivers/clk/mediatek/clk-mt8196-imp_iic_wrap.c

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index c977719046a4..fe2697b64ef0 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig
@@ -1010,6 +1010,13 @@ config COMMON_CLK_MT8196
help
This driver supports MediaTek MT8196 basic clocks.

+config COMMON_CLK_MT8196_IMP_IIC_WRAP
+ tristate "Clock driver for MediaTek MT8196 imp_iic_wrap"
+ depends on COMMON_CLK_MT8196
+ default COMMON_CLK_MT8196
+ help
+ This driver supports MediaTek MT8196 i2c clocks.
+
config COMMON_CLK_MT8196_PEXTPSYS
tristate "Clock driver for MediaTek MT8196 pextpsys"
depends on COMMON_CLK_MT8196
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index 88f7d8a229c2..241e7f5e7316 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -153,6 +153,7 @@ obj-$(CONFIG_COMMON_CLK_MT8195_WPESYS) += clk-mt8195-wpe.o
obj-$(CONFIG_COMMON_CLK_MT8196) += clk-mt8196-apmixedsys.o clk-mt8196-topckgen.o \
clk-mt8196-topckgen2.o clk-mt8196-vlpckgen.o \
clk-mt8196-peri_ao.o
+obj-$(CONFIG_COMMON_CLK_MT8196_IMP_IIC_WRAP) += clk-mt8196-imp_iic_wrap.o
obj-$(CONFIG_COMMON_CLK_MT8196_PEXTPSYS) += clk-mt8196-pextp.o
obj-$(CONFIG_COMMON_CLK_MT8196_UFSSYS) += clk-mt8196-ufs_ao.o
obj-$(CONFIG_COMMON_CLK_MT8365) += clk-mt8365-apmixedsys.o clk-mt8365.o
diff --git a/drivers/clk/mediatek/clk-mt8196-imp_iic_wrap.c b/drivers/clk/mediatek/clk-mt8196-imp_iic_wrap.c
new file mode 100644
index 000000000000..a63241671650
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8196-imp_iic_wrap.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025 MediaTek Inc.
+ * Guangjie Song <guangjie.song@mediatek.com>
+ * Copyright (c) 2025 Collabora Ltd.
+ * Laura Nao <laura.nao@collabora.com>
+ */
+#include <dt-bindings/clock/mediatek,mt8196-clock.h>
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "clk-gate.h"
+#include "clk-mtk.h"
+
+static const struct mtk_gate_regs imp_cg_regs = {
+ .set_ofs = 0xe08,
+ .clr_ofs = 0xe04,
+ .sta_ofs = 0xe00,
+};
+
+#define GATE_IMP(_id, _name, _parent, _shift) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _parent, \
+ .regs = &imp_cg_regs, \
+ .shift = _shift, \
+ .flags = CLK_OPS_PARENT_ENABLE, \
+ .ops = &mtk_clk_gate_ops_setclr, \
+ }
+
+static const struct mtk_gate impc_clks[] = {
+ GATE_IMP(CLK_IMPC_I2C11, "impc_i2c11", "i2c_p", 0),
+ GATE_IMP(CLK_IMPC_I2C12, "impc_i2c12", "i2c_p", 1),
+ GATE_IMP(CLK_IMPC_I2C13, "impc_i2c13", "i2c_p", 2),
+ GATE_IMP(CLK_IMPC_I2C14, "impc_i2c14", "i2c_p", 3),
+};
+
+static const struct mtk_clk_desc impc_mcd = {
+ .clks = impc_clks,
+ .num_clks = ARRAY_SIZE(impc_clks),
+};
+
+static const struct mtk_gate impe_clks[] = {
+ GATE_IMP(CLK_IMPE_I2C5, "impe_i2c5", "i2c_east", 0),
+};
+
+static const struct mtk_clk_desc impe_mcd = {
+ .clks = impe_clks,
+ .num_clks = ARRAY_SIZE(impe_clks),
+};
+
+static const struct mtk_gate_regs impn_hwv_regs = {
+ .set_ofs = 0x0000,
+ .clr_ofs = 0x0004,
+ .sta_ofs = 0x2c00,
+};
+
+#define GATE_HWV_IMPN(_id, _name, _parent, _shift) { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _parent, \
+ .regs = &imp_cg_regs, \
+ .hwv_regs = &impn_hwv_regs, \
+ .shift = _shift, \
+ .ops = &mtk_clk_gate_hwv_ops_setclr, \
+ .flags = CLK_OPS_PARENT_ENABLE, \
+ }
+
+static const struct mtk_gate impn_clks[] = {
+ GATE_IMP(CLK_IMPN_I2C1, "impn_i2c1", "i2c_north", 0),
+ GATE_IMP(CLK_IMPN_I2C2, "impn_i2c2", "i2c_north", 1),
+ GATE_IMP(CLK_IMPN_I2C4, "impn_i2c4", "i2c_north", 2),
+ GATE_HWV_IMPN(CLK_IMPN_I2C7, "impn_i2c7", "i2c_north", 3),
+ GATE_IMP(CLK_IMPN_I2C8, "impn_i2c8", "i2c_north", 4),
+ GATE_IMP(CLK_IMPN_I2C9, "impn_i2c9", "i2c_north", 5),
+};
+
+static const struct mtk_clk_desc impn_mcd = {
+ .clks = impn_clks,
+ .num_clks = ARRAY_SIZE(impn_clks),
+};
+
+static const struct mtk_gate impw_clks[] = {
+ GATE_IMP(CLK_IMPW_I2C0, "impw_i2c0", "i2c_west", 0),
+ GATE_IMP(CLK_IMPW_I2C3, "impw_i2c3", "i2c_west", 1),
+ GATE_IMP(CLK_IMPW_I2C6, "impw_i2c6", "i2c_west", 2),
+ GATE_IMP(CLK_IMPW_I2C10, "impw_i2c10", "i2c_west", 3),
+};
+
+static const struct mtk_clk_desc impw_mcd = {
+ .clks = impw_clks,
+ .num_clks = ARRAY_SIZE(impw_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8196_imp_iic_wrap[] = {
+ { .compatible = "mediatek,mt8196-imp-iic-wrap-c", .data = &impc_mcd },
+ { .compatible = "mediatek,mt8196-imp-iic-wrap-e", .data = &impe_mcd },
+ { .compatible = "mediatek,mt8196-imp-iic-wrap-n", .data = &impn_mcd },
+ { .compatible = "mediatek,mt8196-imp-iic-wrap-w", .data = &impw_mcd },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_match_clk_mt8196_imp_iic_wrap);
+
+static struct platform_driver clk_mt8196_imp_iic_wrap_drv = {
+ .probe = mtk_clk_simple_probe,
+ .remove = mtk_clk_simple_remove,
+ .driver = {
+ .name = "clk-mt8196-imp_iic_wrap",
+ .of_match_table = of_match_clk_mt8196_imp_iic_wrap,
+ },
+};
+module_platform_driver(clk_mt8196_imp_iic_wrap_drv);
+
+MODULE_DESCRIPTION("MediaTek MT8196 I2C Wrapper clocks driver");
+MODULE_LICENSE("GPL");
--
2.39.5