drivers/clk/mediatek/clk-mt8196-pextp.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt8196-pextp.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt8196-pextp.c
Extension
.c
Size
4662 bytes
Lines
132
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 <dt-bindings/reset/mediatek,mt8196-resets.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"
#include "reset.h"

#define MT8196_PEXTP_RST0_SET_OFFSET	0x8

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,		\
		.ops = &mtk_clk_gate_ops_setclr,\
	}

static const struct mtk_gate pext_clks[] = {
	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_TL, "pext_pm0_tl", "tl", 0),
	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_REF, "pext_pm0_ref", "clk26m", 1),
	GATE_PEXT(CLK_PEXT_PEXTP_PHY_P0_MCU_BUS, "pext_pp0_mcu_bus", "clk26m", 6),
	GATE_PEXT(CLK_PEXT_PEXTP_PHY_P0_PEXTP_REF, "pext_pp0_pextp_ref", "clk26m", 7),
	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_AXI_250, "pext_pm0_axi_250", "ufs_pexpt0_mem_sub", 12),
	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_AHB_APB, "pext_pm0_ahb_apb", "ufs_pextp0_axi", 13),
	GATE_PEXT(CLK_PEXT_PEXTP_MAC_P0_PL_P, "pext_pm0_pl_p", "clk26m", 14),
	GATE_PEXT(CLK_PEXT_PEXTP_VLP_AO_P0_LP, "pext_pextp_vlp_ao_p0_lp", "clk26m", 19),
};

static u16 pext_rst_ofs[] = { MT8196_PEXTP_RST0_SET_OFFSET };

static u16 pext_rst_idx_map[] = {
	[MT8196_PEXTP0_RST0_PCIE0_MAC] = 0,
	[MT8196_PEXTP0_RST0_PCIE0_PHY] = 1,
};

static const struct mtk_clk_rst_desc pext_rst_desc = {
	.version = MTK_RST_SET_CLR,
	.rst_bank_ofs = pext_rst_ofs,
	.rst_bank_nr = ARRAY_SIZE(pext_rst_ofs),
	.rst_idx_map = pext_rst_idx_map,
	.rst_idx_map_nr = ARRAY_SIZE(pext_rst_idx_map),
};

static const struct mtk_clk_desc pext_mcd = {
	.clks = pext_clks,
	.num_clks = ARRAY_SIZE(pext_clks),
	.rst_desc = &pext_rst_desc,
};

static const struct mtk_gate pext1_clks[] = {
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P1_TL, "pext1_pm1_tl", "tl_p1", 0),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P1_REF, "pext1_pm1_ref", "clk26m", 1),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P2_TL, "pext1_pm2_tl", "tl_p2", 2),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P2_REF, "pext1_pm2_ref", "clk26m", 3),
	GATE_PEXT(CLK_PEXT1_PEXTP_PHY_P1_MCU_BUS, "pext1_pp1_mcu_bus", "clk26m", 8),
	GATE_PEXT(CLK_PEXT1_PEXTP_PHY_P1_PEXTP_REF, "pext1_pp1_pextp_ref", "clk26m", 9),
	GATE_PEXT(CLK_PEXT1_PEXTP_PHY_P2_MCU_BUS, "pext1_pp2_mcu_bus", "clk26m", 10),
	GATE_PEXT(CLK_PEXT1_PEXTP_PHY_P2_PEXTP_REF, "pext1_pp2_pextp_ref", "clk26m", 11),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P1_AXI_250, "pext1_pm1_axi_250",
		   "pextp1_usb_axi", 16),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P1_AHB_APB, "pext1_pm1_ahb_apb",
		   "pextp1_usb_mem_sub", 17),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P1_PL_P, "pext1_pm1_pl_p", "clk26m", 18),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P2_AXI_250, "pext1_pm2_axi_250",
		   "pextp1_usb_axi", 19),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P2_AHB_APB, "pext1_pm2_ahb_apb",
		   "pextp1_usb_mem_sub", 20),
	GATE_PEXT(CLK_PEXT1_PEXTP_MAC_P2_PL_P, "pext1_pm2_pl_p", "clk26m", 21),
	GATE_PEXT(CLK_PEXT1_PEXTP_VLP_AO_P1_LP, "pext1_pextp_vlp_ao_p1_lp", "clk26m", 26),
	GATE_PEXT(CLK_PEXT1_PEXTP_VLP_AO_P2_LP, "pext1_pextp_vlp_ao_p2_lp", "clk26m", 27),
};

Annotation

Implementation Notes