drivers/clk/mediatek/clk-mt8516.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt8516.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt8516.c
Extension
.c
Size
20433 bytes
Lines
682
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) 2019 MediaTek Inc.
 * Author: James Liao <jamesjj.liao@mediatek.com>
 *         Fabien Parent <fparent@baylibre.com>
 * Copyright (c) 2023 Collabora Ltd.
 */

#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>

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

#include <dt-bindings/clock/mt8516-clk.h>

static DEFINE_SPINLOCK(mt8516_clk_lock);

static const struct mtk_fixed_clk fixed_clks[] __initconst = {
	FIXED_CLK(CLK_TOP_CLK_NULL, "clk_null", NULL, 0),
	FIXED_CLK(CLK_TOP_I2S_INFRA_BCK, "i2s_infra_bck", "clk_null", 26000000),
	FIXED_CLK(CLK_TOP_MEMPLL, "mempll", "clk26m", 800000000),
};

static const struct mtk_fixed_factor top_divs[] __initconst = {
	FACTOR(CLK_TOP_DMPLL, "dmpll_ck", "mempll", 1, 1),
	FACTOR(CLK_TOP_MAINPLL_D2, "mainpll_d2", "mainpll", 1, 2),
	FACTOR(CLK_TOP_MAINPLL_D4, "mainpll_d4", "mainpll", 1, 4),
	FACTOR(CLK_TOP_MAINPLL_D8, "mainpll_d8", "mainpll", 1, 8),
	FACTOR(CLK_TOP_MAINPLL_D16, "mainpll_d16", "mainpll", 1, 16),
	FACTOR(CLK_TOP_MAINPLL_D11, "mainpll_d11", "mainpll", 1, 11),
	FACTOR(CLK_TOP_MAINPLL_D22, "mainpll_d22", "mainpll", 1, 22),
	FACTOR(CLK_TOP_MAINPLL_D3, "mainpll_d3", "mainpll", 1, 3),
	FACTOR(CLK_TOP_MAINPLL_D6, "mainpll_d6", "mainpll", 1, 6),
	FACTOR(CLK_TOP_MAINPLL_D12, "mainpll_d12", "mainpll", 1, 12),
	FACTOR(CLK_TOP_MAINPLL_D5, "mainpll_d5", "mainpll", 1, 5),
	FACTOR(CLK_TOP_MAINPLL_D10, "mainpll_d10", "mainpll", 1, 10),
	FACTOR(CLK_TOP_MAINPLL_D20, "mainpll_d20", "mainpll", 1, 20),
	FACTOR(CLK_TOP_MAINPLL_D40, "mainpll_d40", "mainpll", 1, 40),
	FACTOR(CLK_TOP_MAINPLL_D7, "mainpll_d7", "mainpll", 1, 7),
	FACTOR(CLK_TOP_MAINPLL_D14, "mainpll_d14", "mainpll", 1, 14),
	FACTOR(CLK_TOP_UNIVPLL_D2, "univpll_d2", "univpll", 1, 2),
	FACTOR(CLK_TOP_UNIVPLL_D4, "univpll_d4", "univpll", 1, 4),
	FACTOR(CLK_TOP_UNIVPLL_D8, "univpll_d8", "univpll", 1, 8),
	FACTOR(CLK_TOP_UNIVPLL_D16, "univpll_d16", "univpll", 1, 16),
	FACTOR(CLK_TOP_UNIVPLL_D3, "univpll_d3", "univpll", 1, 3),
	FACTOR(CLK_TOP_UNIVPLL_D6, "univpll_d6", "univpll", 1, 6),
	FACTOR(CLK_TOP_UNIVPLL_D12, "univpll_d12", "univpll", 1, 12),
	FACTOR(CLK_TOP_UNIVPLL_D24, "univpll_d24", "univpll", 1, 24),
	FACTOR(CLK_TOP_UNIVPLL_D5, "univpll_d5", "univpll", 1, 5),
	FACTOR(CLK_TOP_UNIVPLL_D20, "univpll_d20", "univpll", 1, 20),
	FACTOR(CLK_TOP_MMPLL380M, "mmpll380m", "mmpll", 1, 1),
	FACTOR(CLK_TOP_MMPLL_D2, "mmpll_d2", "mmpll", 1, 2),
	FACTOR(CLK_TOP_MMPLL_200M, "mmpll_200m", "mmpll", 1, 3),
	FACTOR(CLK_TOP_USB_PHY48M, "usb_phy48m_ck", "univpll", 1, 26),
	FACTOR(CLK_TOP_APLL1, "apll1_ck", "apll1", 1, 1),
	FACTOR(CLK_TOP_APLL1_D2, "apll1_d2", "apll1_ck", 1, 2),
	FACTOR(CLK_TOP_APLL1_D4, "apll1_d4", "rg_apll1_d2_en", 1, 2),
	FACTOR(CLK_TOP_APLL1_D8, "apll1_d8", "rg_apll1_d4_en", 1, 2),
	FACTOR(CLK_TOP_APLL2, "apll2_ck", "apll2", 1, 1),
	FACTOR(CLK_TOP_APLL2_D2, "apll2_d2", "apll2_ck", 1, 2),
	FACTOR(CLK_TOP_APLL2_D4, "apll2_d4", "rg_apll2_d2_en", 1, 2),
	FACTOR(CLK_TOP_APLL2_D8, "apll2_d8", "rg_apll2_d4_en", 1, 2),
	FACTOR(CLK_TOP_CLK26M, "clk26m_ck", "clk26m", 1, 1),
	FACTOR(CLK_TOP_CLK26M_D2, "clk26m_d2", "clk26m", 1, 2),
	FACTOR(CLK_TOP_AHB_INFRA_D2, "ahb_infra_d2", "ahb_infra_sel", 1, 2),
	FACTOR(CLK_TOP_NFI1X, "nfi1x_ck", "nfi2x_pad_sel", 1, 2),
	FACTOR(CLK_TOP_ETH_D2, "eth_d2_ck", "eth_sel", 1, 2),
};

static const char * const uart0_parents[] __initconst = {
	"clk26m_ck",
	"univpll_d24"
};

static const char * const ahb_infra_parents[] __initconst = {
	"clk_null",
	"clk26m_ck",
	"mainpll_d11",
	"clk_null",
	"mainpll_d12",
	"clk_null",
	"clk_null",
	"clk_null",
	"clk_null",
	"clk_null",

Annotation

Implementation Notes