drivers/clk/mediatek/clk-mt7981-eth.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt7981-eth.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt7981-eth.c
Extension
.c
Size
3371 bytes
Lines
120
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
/*
 * Copyright (c) 2021 MediaTek Inc.
 * Author: Sam Shih <sam.shih@mediatek.com>
 * Author: Wenzhen Yu <wenzhen.yu@mediatek.com>
 * Author: Jianhui Zhao <zhaojh329@gmail.com>
 * Author: Daniel Golle <daniel@makrotopia.org>
 */

#include <linux/clk-provider.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

#include "clk-mtk.h"
#include "clk-gate.h"

#include <dt-bindings/clock/mediatek,mt7981-clk.h>

static const struct mtk_gate_regs sgmii0_cg_regs = {
	.set_ofs = 0xE4,
	.clr_ofs = 0xE4,
	.sta_ofs = 0xE4,
};

#define GATE_SGMII0(_id, _name, _parent, _shift) {	\
		.id = _id,				\
		.name = _name,				\
		.parent_name = _parent,			\
		.regs = &sgmii0_cg_regs,			\
		.shift = _shift,			\
		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
	}

static const struct mtk_gate sgmii0_clks[] = {
	GATE_SGMII0(CLK_SGM0_TX_EN, "sgm0_tx_en", "usb_tx250m", 2),
	GATE_SGMII0(CLK_SGM0_RX_EN, "sgm0_rx_en", "usb_eq_rx250m", 3),
	GATE_SGMII0(CLK_SGM0_CK0_EN, "sgm0_ck0_en", "usb_ln0", 4),
	GATE_SGMII0(CLK_SGM0_CDR_CK0_EN, "sgm0_cdr_ck0_en", "usb_cdr", 5),
};

static const struct mtk_gate_regs sgmii1_cg_regs = {
	.set_ofs = 0xE4,
	.clr_ofs = 0xE4,
	.sta_ofs = 0xE4,
};

#define GATE_SGMII1(_id, _name, _parent, _shift) {	\
		.id = _id,				\
		.name = _name,				\
		.parent_name = _parent,			\
		.regs = &sgmii1_cg_regs,			\
		.shift = _shift,			\
		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
	}

static const struct mtk_gate sgmii1_clks[] = {
	GATE_SGMII1(CLK_SGM1_TX_EN, "sgm1_tx_en", "usb_tx250m", 2),
	GATE_SGMII1(CLK_SGM1_RX_EN, "sgm1_rx_en", "usb_eq_rx250m", 3),
	GATE_SGMII1(CLK_SGM1_CK1_EN, "sgm1_ck1_en", "usb_ln0", 4),
	GATE_SGMII1(CLK_SGM1_CDR_CK1_EN, "sgm1_cdr_ck1_en", "usb_cdr", 5),
};

static const struct mtk_gate_regs eth_cg_regs = {
	.set_ofs = 0x30,
	.clr_ofs = 0x30,
	.sta_ofs = 0x30,
};

#define GATE_ETH(_id, _name, _parent, _shift) {	\
		.id = _id,				\
		.name = _name,				\
		.parent_name = _parent,			\
		.regs = &eth_cg_regs,			\
		.shift = _shift,			\
		.ops = &mtk_clk_gate_ops_no_setclr_inv,	\
	}

static const struct mtk_gate eth_clks[] = {
	GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "netsys_2x", 6),
	GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "sgm_325m", 7),
	GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "sgm_325m", 8),
	GATE_ETH(CLK_ETH_WOCPU0_EN, "eth_wocpu0_en", "netsys_wed_mcu", 15),
};

static const struct mtk_clk_desc eth_desc = {
	.clks = eth_clks,
	.num_clks = ARRAY_SIZE(eth_clks),
};

static const struct mtk_clk_desc sgmii0_desc = {

Annotation

Implementation Notes