clk: mediatek: Add MT8188 imp i2c wrapper clock support

Add MT8188 imp i2c wrapper clock controllers which provide clock gate
control in I2C IP blocks.

Signed-off-by: Garmin.Chang <Garmin.Chang@mediatek.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230331123621.16167-19-Garmin.Chang@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: garminchang

drivers/clk/mediatek/Kconfig

@@ -706,6 +706,13 @@ config COMMON_CLK_MT8188_IMGSYS
 	help
 	  This driver supports MediaTek MT8188 imgsys and imgsys2 clocks.
 
+config COMMON_CLK_MT8188_IMP_IIC_WRAP
+	tristate "Clock driver for MediaTek MT8188 imp_iic_wrap"
+	depends on COMMON_CLK_MT8188
+	default COMMON_CLK_MT8188
+	help
+	  This driver supports MediaTek MT8188 I2C/I3C clocks.
+
 config COMMON_CLK_MT8188_IPESYS
 	tristate "Clock driver for MediaTek MT8188 ipesys"
 	depends on COMMON_CLK_MT8188_IMGSYS

drivers/clk/mediatek/Makefile

@@ -104,6 +104,7 @@ 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_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
 obj-$(CONFIG_COMMON_CLK_MT8188_IPESYS) += clk-mt8188-ipe.o
 obj-$(CONFIG_COMMON_CLK_MT8188_MFGCFG) += clk-mt8188-mfg.o
 obj-$(CONFIG_COMMON_CLK_MT8188_VDECSYS) += clk-mt8188-vdec.o

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

@@ -0,0 +1,80 @@
+// 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 imp_iic_wrap_cg_regs = {
+	.set_ofs = 0xe08,
+	.clr_ofs = 0xe04,
+	.sta_ofs = 0xe00,
+};
+
+#define GATE_IMP_IIC_WRAP(_id, _name, _parent, _shift)			\
+	GATE_MTK_FLAGS(_id, _name, _parent, &imp_iic_wrap_cg_regs, _shift,			\
+		&mtk_clk_gate_ops_setclr, CLK_OPS_PARENT_ENABLE)
+
+static const struct mtk_gate imp_iic_wrap_c_clks[] = {
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_C_AP_CLOCK_I2C0,
+			  "imp_iic_wrap_c_ap_clock_i2c0", "top_i2c", 0),
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_C_AP_CLOCK_I2C2,
+			  "imp_iic_wrap_c_ap_clock_i2c2", "top_i2c", 1),
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_C_AP_CLOCK_I2C3,
+			  "imp_iic_wrap_c_ap_clock_i2c3", "top_i2c", 2),
+};
+
+static const struct mtk_gate imp_iic_wrap_w_clks[] = {
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_W_AP_CLOCK_I2C1,
+			  "imp_iic_wrap_w_ap_clock_i2c1", "top_i2c", 0),
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_W_AP_CLOCK_I2C4,
+			  "imp_iic_wrap_w_ap_clock_i2c4", "top_i2c", 1),
+};
+
+static const struct mtk_gate imp_iic_wrap_en_clks[] = {
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_EN_AP_CLOCK_I2C5,
+			  "imp_iic_wrap_en_ap_clock_i2c5", "top_i2c", 0),
+	GATE_IMP_IIC_WRAP(CLK_IMP_IIC_WRAP_EN_AP_CLOCK_I2C6,
+			  "imp_iic_wrap_en_ap_clock_i2c6", "top_i2c", 1),
+};
+
+static const struct mtk_clk_desc imp_iic_wrap_c_desc = {
+	.clks = imp_iic_wrap_c_clks,
+	.num_clks = ARRAY_SIZE(imp_iic_wrap_c_clks),
+};
+
+static const struct mtk_clk_desc imp_iic_wrap_w_desc = {
+	.clks = imp_iic_wrap_w_clks,
+	.num_clks = ARRAY_SIZE(imp_iic_wrap_w_clks),
+};
+
+static const struct mtk_clk_desc imp_iic_wrap_en_desc = {
+	.clks = imp_iic_wrap_en_clks,
+	.num_clks = ARRAY_SIZE(imp_iic_wrap_en_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8188_imp_iic_wrap[] = {
+	{ .compatible = "mediatek,mt8188-imp-iic-wrap-c", .data = &imp_iic_wrap_c_desc },
+	{ .compatible = "mediatek,mt8188-imp-iic-wrap-w", .data = &imp_iic_wrap_w_desc },
+	{ .compatible = "mediatek,mt8188-imp-iic-wrap-en", .data = &imp_iic_wrap_en_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, of_match_clk_mt8188_imp_iic_wrap);
+
+static struct platform_driver clk_mt8188_imp_iic_wrap_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8188-imp_iic_wrap",
+		.of_match_table = of_match_clk_mt8188_imp_iic_wrap,
+	},
+};
+
+module_platform_driver(clk_mt8188_imp_iic_wrap_drv);
+MODULE_LICENSE("GPL");