[PATCH 23/26] clk: mediatek: Add MT8196 pextpsys clock support

[Guangjie Song <guangjie.song@mediatek.com>]

Add MT8196 pextpsys clock controller which provides clock gate control
for pcie.

Signed-off-by: Guangjie Song <guangjie.song@mediatek.com>
---
 drivers/clk/mediatek/Kconfig            |   7 +
 drivers/clk/mediatek/Makefile           |   1 +
 drivers/clk/mediatek/clk-mt8196-pextp.c | 162 ++++++++++++++++++++++++
 3 files changed, 170 insertions(+)
 create mode 100644 drivers/clk/mediatek/clk-mt8196-pextp.c

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index dcb660d45bcf..2aafba083835 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig
@@ -1052,6 +1052,13 @@ config COMMON_CLK_MT8196_MMSYS
 	help
 	  This driver supports MediaTek MT8196 mmsys clocks.
 
+config COMMON_CLK_MT8196_PEXTPSYS
+	tristate "Clock driver for MediaTek MT8196 pextpsys"
+	depends on COMMON_CLK_MT8196
+	default COMMON_CLK_MT8196
+	help
+	  This driver supports MediaTek MT8196 pextpsys clocks.
+
 config COMMON_CLK_MT8365
 	tristate "Clock driver for MediaTek MT8365"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index 472462cd8711..3058e7855ff3 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -160,6 +160,7 @@ obj-$(CONFIG_COMMON_CLK_MT8196_MDPSYS) += clk-mt8196-mdpsys.o
 obj-$(CONFIG_COMMON_CLK_MT8196_MFGCFG) += clk-mt8196-mfg.o
 obj-$(CONFIG_COMMON_CLK_MT8196_MMSYS) += clk-mt8196-disp0.o clk-mt8196-disp1.o clk-mt8196-vdisp_ao.o \
 					 clk-mt8196-ovl0.o clk-mt8196-ovl1.o
+obj-$(CONFIG_COMMON_CLK_MT8196_PEXTPSYS) += clk-mt8196-pextp.o
 obj-$(CONFIG_COMMON_CLK_MT8365) += clk-mt8365-apmixedsys.o clk-mt8365.o
 obj-$(CONFIG_COMMON_CLK_MT8365_APU) += clk-mt8365-apu.o
 obj-$(CONFIG_COMMON_CLK_MT8365_CAM) += clk-mt8365-cam.o
diff --git a/drivers/clk/mediatek/clk-mt8196-pextp.c b/drivers/clk/mediatek/clk-mt8196-pextp.c
new file mode 100644
index 000000000000..8b394e18d0eb
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8196-pextp.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025 MediaTek Inc.
+ * Author: Guangjie Song <guangjie.song@mediatek.com>
+ */
+#include <dt-bindings/clock/mt8196-clk.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 pext_cg_regs = {
+	.set_ofs = 0x18,
+	.clr_ofs = 0x1c,
+	.sta_ofs = 0x14,
+};
+
+#define GATE_PEXT(_id, _name, _parent, _shift) {\
+		.id = _id,			\
+		.name = _name,			\
+		.parent_name = _parent,		\
+		.regs = &pext_cg_regs,		\
+		.shift = _shift,		\
+		.flags = CLK_OPS_PARENT_ENABLE,	\
+		.ops = &mtk_clk_gate_ops_setclr,\
+	}
+
+#define GATE_PEXT_V(_id, _name, _parent) {	\
+		.id = _id,			\
+		.name = _name,			\
+		.parent_name = _parent,		\
+		.regs = &cg_regs_dummy,		\
+		.ops = &mtk_clk_dummy_ops,	\
+	}
+
+static const struct mtk_gate pext_clks[] = {
+	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_TL, "pext_pm0_tl", "ck_tl_ck", 0),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_MAC_P0_TL_PCIE, "pext_pm0_tl_pcie", "pext_pm0_tl"),
+	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_REF, "pext_pm0_ref", "ck_f26m_ck", 1),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_MAC_P0_REF_PCIE, "pext_pm0_ref_pcie", "pext_pm0_ref"),
+	GATE_PEXT(CLK_PEXT_PEXTP_PHY_P0_MCU_BUS, "pext_pp0_mcu_bus", "ck_f26m_ck", 6),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_PHY_P0_MCU_BUS_PCIE, "pext_pp0_mcu_bus_pcie",
+		    "pext_pp0_mcu_bus"),
+	GATE_PEXT(CLK_PEXT_PEXTP_PHY_P0_PEXTP_REF, "pext_pp0_pextp_ref", "ck_f26m_ck", 7),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_PHY_P0_PEXTP_REF_PCIE, "pext_pp0_pextp_ref_pcie",
+		    "pext_pp0_pextp_ref"),
+	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_AXI_250, "pext_pm0_axi_250", "ck_pexpt0_mem_sub_ck", 12),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_MAC_P0_AXI_250_PCIE, "pext_pm0_axi_250_pcie",
+		    "pext_pm0_axi_250"),
+	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_AHB_APB, "pext_pm0_ahb_apb", "ck_pextp0_axi_ck", 13),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_MAC_P0_AHB_APB_PCIE, "pext_pm0_ahb_apb_pcie",
+		    "pext_pm0_ahb_apb"),
+	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_PL_P, "pext_pm0_pl_p", "ck_f26m_ck", 14),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_MAC_P0_PL_P_PCIE, "pext_pm0_pl_p_pcie", "pext_pm0_pl_p"),
+	GATE_PEXT(CLK_PEXT_PEXTP_VLP_AO_P0_LP, "pext_pextp_vlp_ao_p0_lp", "ck_f26m_ck", 19),
+	GATE_PEXT_V(CLK_PEXT_PEXTP_VLP_AO_P0_LP_PCIE, "pext_pextp_vlp_ao_p0_lp_pcie",
+		    "pext_pextp_vlp_ao_p0_lp"),
+};
+
+static const struct mtk_clk_desc pext_mcd = {
+	.clks = pext_clks,
+	.num_clks = ARRAY_SIZE(pext_clks),
+};
+
+static const struct mtk_gate_regs pext1_cg_regs = {
+	.set_ofs = 0x18,
+	.clr_ofs = 0x1c,
+	.sta_ofs = 0x14,
+};
+
+#define GATE_PEXT1(_id, _name, _parent, _shift) {	\
+		.id = _id,				\
+		.name = _name,				\
+		.parent_name = _parent,			\
+		.regs = &pext1_cg_regs,			\
+		.shift = _shift,			\
+		.flags = CLK_OPS_PARENT_ENABLE,		\
+		.ops = &mtk_clk_gate_ops_setclr,	\
+	}
+
+#define GATE_PEXT1_V(_id, _name, _parent) {	\
+		.id = _id,			\
+		.name = _name,			\
+		.parent_name = _parent,		\
+		.regs = &cg_regs_dummy,		\
+		.ops = &mtk_clk_dummy_ops,	\
+	}
+
+static const struct mtk_gate pext1_clks[] = {
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P1_TL, "pext1_pm1_tl", "ck_tl_p1_ck", 0),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P1_TL_PCIE, "pext1_pm1_tl_pcie", "pext1_pm1_tl"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P1_REF, "pext1_pm1_ref", "ck_f26m_ck", 1),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P1_REF_PCIE, "pext1_pm1_ref_pcie", "pext1_pm1_ref"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P2_TL, "pext1_pm2_tl", "ck_tl_p2_ck", 2),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P2_TL_PCIE, "pext1_pm2_tl_pcie", "pext1_pm2_tl"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P2_REF, "pext1_pm2_ref", "ck_f26m_ck", 3),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P2_REF_PCIE, "pext1_pm2_ref_pcie", "pext1_pm2_ref"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_PHY_P1_MCU_BUS, "pext1_pp1_mcu_bus", "ck_f26m_ck", 8),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_PHY_P1_MCU_BUS_PCIE, "pext1_pp1_mcu_bus_pcie",
+		     "pext1_pp1_mcu_bus"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_PHY_P1_PEXTP_REF, "pext1_pp1_pextp_ref", "ck_f26m_ck", 9),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_PHY_P1_PEXTP_REF_PCIE, "pext1_pp1_pextp_ref_pcie",
+		     "pext1_pp1_pextp_ref"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_PHY_P2_MCU_BUS, "pext1_pp2_mcu_bus", "ck_f26m_ck", 10),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_PHY_P2_MCU_BUS_PCIE, "pext1_pp2_mcu_bus_pcie",
+		     "pext1_pp2_mcu_bus"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_PHY_P2_PEXTP_REF, "pext1_pp2_pextp_ref", "ck_f26m_ck", 11),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_PHY_P2_PEXTP_REF_PCIE, "pext1_pp2_pextp_ref_pcie",
+		     "pext1_pp2_pextp_ref"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P1_AXI_250, "pext1_pm1_axi_250",
+		   "ck_pextp1_usb_axi_ck", 16),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P1_AXI_250_PCIE, "pext1_pm1_axi_250_pcie",
+		     "pext1_pm1_axi_250"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P1_AHB_APB, "pext1_pm1_ahb_apb",
+		   "ck_pextp1_usb_mem_sub_ck", 17),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P1_AHB_APB_PCIE, "pext1_pm1_ahb_apb_pcie",
+		     "pext1_pm1_ahb_apb"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P1_PL_P, "pext1_pm1_pl_p", "ck_f26m_ck", 18),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P1_PL_P_PCIE, "pext1_pm1_pl_p_pcie", "pext1_pm1_pl_p"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P2_AXI_250, "pext1_pm2_axi_250",
+		   "ck_pextp1_usb_axi_ck", 19),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P2_AXI_250_PCIE, "pext1_pm2_axi_250_pcie",
+		     "pext1_pm2_axi_250"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P2_AHB_APB, "pext1_pm2_ahb_apb",
+		   "ck_pextp1_usb_mem_sub_ck", 20),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P2_AHB_APB_PCIE, "pext1_pm2_ahb_apb_pcie",
+		     "pext1_pm2_ahb_apb"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_MAC_P2_PL_P, "pext1_pm2_pl_p", "ck_f26m_ck", 21),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_MAC_P2_PL_P_PCIE, "pext1_pm2_pl_p_pcie", "pext1_pm2_pl_p"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_VLP_AO_P1_LP, "pext1_pextp_vlp_ao_p1_lp", "ck_f26m_ck", 26),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_VLP_AO_P1_LP_PCIE, "pext1_pextp_vlp_ao_p1_lp_pcie",
+		     "pext1_pextp_vlp_ao_p1_lp"),
+	GATE_PEXT1(CLK_PEXT1_PEXTP_VLP_AO_P2_LP, "pext1_pextp_vlp_ao_p2_lp", "ck_f26m_ck", 27),
+	GATE_PEXT1_V(CLK_PEXT1_PEXTP_VLP_AO_P2_LP_PCIE, "pext1_pextp_vlp_ao_p2_lp_pcie",
+		     "pext1_pextp_vlp_ao_p2_lp"),
+};
+
+static const struct mtk_clk_desc pext1_mcd = {
+	.clks = pext1_clks,
+	.num_clks = ARRAY_SIZE(pext1_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8196_pextp[] = {
+	{ .compatible = "mediatek,mt8196-pextp0cfg_ao", .data = &pext_mcd, },
+	{ .compatible = "mediatek,mt8196-pextp1cfg_ao", .data = &pext1_mcd, },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver clk_mt8196_pextp_drv = {
+	.probe = mtk_clk_simple_probe,
+	.remove = mtk_clk_simple_remove,
+	.driver = {
+		.name = "clk-mt8196-pextp",
+		.of_match_table = of_match_clk_mt8196_pextp,
+	},
+};
+
+module_platform_driver(clk_mt8196_pextp_drv);
+MODULE_LICENSE("GPL");
-- 
2.45.2