drivers/clk/mediatek/clk-mt6797.c

Source file repositories/reference/linux-study-clean/drivers/clk/mediatek/clk-mt6797.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/mediatek/clk-mt6797.c
Extension
.c
Size
23000 bytes
Lines
714
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) 2016 MediaTek Inc.
 * Author: Kevin Chen <kevin-cw.chen@mediatek.com>
 */

#include <linux/of.h>
#include <linux/platform_device.h>

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

#include <dt-bindings/clock/mt6797-clk.h>

/*
 * For some clocks, we don't care what their actual rates are. And these
 * clocks may change their rate on different products or different scenarios.
 * So we model these clocks' rate as 0, to denote it's not an actual rate.
 */

static DEFINE_SPINLOCK(mt6797_clk_lock);

static const struct mtk_fixed_factor top_fixed_divs[] = {
	FACTOR(CLK_TOP_SYSPLL_CK, "syspll_ck", "mainpll", 1, 1),
	FACTOR(CLK_TOP_SYSPLL_D2, "syspll_d2", "mainpll", 1, 2),
	FACTOR(CLK_TOP_SYSPLL1_D2, "syspll1_d2", "syspll_d2", 1, 2),
	FACTOR(CLK_TOP_SYSPLL1_D4, "syspll1_d4", "syspll_d2", 1, 4),
	FACTOR(CLK_TOP_SYSPLL1_D8, "syspll1_d8", "syspll_d2", 1, 8),
	FACTOR(CLK_TOP_SYSPLL1_D16, "syspll1_d16", "syspll_d2", 1, 16),
	FACTOR(CLK_TOP_SYSPLL_D3, "syspll_d3", "mainpll", 1, 3),
	FACTOR(CLK_TOP_SYSPLL_D3_D3, "syspll_d3_d3", "syspll_d3", 1, 3),
	FACTOR(CLK_TOP_SYSPLL2_D2, "syspll2_d2", "syspll_d3", 1, 2),
	FACTOR(CLK_TOP_SYSPLL2_D4, "syspll2_d4", "syspll_d3", 1, 4),
	FACTOR(CLK_TOP_SYSPLL2_D8, "syspll2_d8", "syspll_d3", 1, 8),
	FACTOR(CLK_TOP_SYSPLL_D5, "syspll_d5", "mainpll", 1, 5),
	FACTOR(CLK_TOP_SYSPLL3_D2, "syspll3_d2", "syspll_d5", 1, 2),
	FACTOR(CLK_TOP_SYSPLL3_D4, "syspll3_d4", "syspll_d5", 1, 4),
	FACTOR(CLK_TOP_SYSPLL_D7, "syspll_d7", "mainpll", 1, 7),
	FACTOR(CLK_TOP_SYSPLL4_D2, "syspll4_d2", "syspll_d7", 1, 2),
	FACTOR(CLK_TOP_SYSPLL4_D4, "syspll4_d4", "syspll_d7", 1, 4),
	FACTOR(CLK_TOP_UNIVPLL_CK, "univpll_ck", "univpll", 1, 1),
	FACTOR(CLK_TOP_UNIVPLL_D7, "univpll_d7", "univpll", 1, 7),
	FACTOR(CLK_TOP_UNIVPLL_D26, "univpll_d26", "univpll", 1, 26),
	FACTOR(CLK_TOP_SSUSB_PHY_48M_CK, "ssusb_phy_48m_ck", "univpll", 1, 1),
	FACTOR(CLK_TOP_USB_PHY48M_CK, "usb_phy48m_ck", "univpll", 1, 1),
	FACTOR(CLK_TOP_UNIVPLL_D2, "univpll_d2", "univpll", 1, 2),
	FACTOR(CLK_TOP_UNIVPLL1_D2, "univpll1_d2", "univpll_d2", 1, 2),
	FACTOR(CLK_TOP_UNIVPLL1_D4, "univpll1_d4", "univpll_d2", 1, 4),
	FACTOR(CLK_TOP_UNIVPLL1_D8, "univpll1_d8", "univpll_d2", 1, 8),
	FACTOR(CLK_TOP_UNIVPLL_D3, "univpll_d3", "univpll", 1, 3),
	FACTOR(CLK_TOP_UNIVPLL2_D2, "univpll2_d2", "univpll", 1, 2),
	FACTOR(CLK_TOP_UNIVPLL2_D4, "univpll2_d4", "univpll", 1, 4),
	FACTOR(CLK_TOP_UNIVPLL2_D8, "univpll2_d8", "univpll", 1, 8),
	FACTOR(CLK_TOP_UNIVPLL_D5, "univpll_d5", "univpll", 1, 5),
	FACTOR(CLK_TOP_UNIVPLL3_D2, "univpll3_d2", "univpll_d5", 1, 2),
	FACTOR(CLK_TOP_UNIVPLL3_D4, "univpll3_d4", "univpll_d5", 1, 4),
	FACTOR(CLK_TOP_UNIVPLL3_D8, "univpll3_d8", "univpll_d5", 1, 8),
	FACTOR(CLK_TOP_ULPOSC_CK_ORG, "ulposc_ck_org", "ulposc", 1, 1),
	FACTOR(CLK_TOP_ULPOSC_CK, "ulposc_ck", "ulposc_ck_org", 1, 3),
	FACTOR(CLK_TOP_ULPOSC_D2, "ulposc_d2", "ulposc_ck", 1, 2),
	FACTOR(CLK_TOP_ULPOSC_D3, "ulposc_d3", "ulposc_ck", 1, 4),
	FACTOR(CLK_TOP_ULPOSC_D4, "ulposc_d4", "ulposc_ck", 1, 8),
	FACTOR(CLK_TOP_ULPOSC_D8, "ulposc_d8", "ulposc_ck", 1, 10),
	FACTOR(CLK_TOP_ULPOSC_D10, "ulposc_d10", "ulposc_ck_org", 1, 1),
	FACTOR(CLK_TOP_APLL1_CK, "apll1_ck", "apll1", 1, 1),
	FACTOR(CLK_TOP_APLL2_CK, "apll2_ck", "apll2", 1, 1),
	FACTOR(CLK_TOP_MFGPLL_CK, "mfgpll_ck", "mfgpll", 1, 1),
	FACTOR(CLK_TOP_MFGPLL_D2, "mfgpll_d2", "mfgpll_ck", 1, 2),
	FACTOR(CLK_TOP_IMGPLL_CK, "imgpll_ck", "imgpll", 1, 1),
	FACTOR(CLK_TOP_IMGPLL_D2, "imgpll_d2", "imgpll_ck", 1, 2),
	FACTOR(CLK_TOP_IMGPLL_D4, "imgpll_d4", "imgpll_ck", 1, 4),
	FACTOR(CLK_TOP_CODECPLL_CK, "codecpll_ck", "codecpll", 1, 1),
	FACTOR(CLK_TOP_CODECPLL_D2, "codecpll_d2", "codecpll_ck", 1, 2),
	FACTOR(CLK_TOP_VDECPLL_CK, "vdecpll_ck", "vdecpll", 1, 1),
	FACTOR(CLK_TOP_TVDPLL_CK, "tvdpll_ck", "tvdpll", 1, 1),
	FACTOR(CLK_TOP_TVDPLL_D2, "tvdpll_d2", "tvdpll_ck", 1, 2),
	FACTOR(CLK_TOP_TVDPLL_D4, "tvdpll_d4", "tvdpll_ck", 1, 4),
	FACTOR(CLK_TOP_TVDPLL_D8, "tvdpll_d8", "tvdpll_ck", 1, 8),
	FACTOR(CLK_TOP_TVDPLL_D16, "tvdpll_d16", "tvdpll_ck", 1, 16),
	FACTOR(CLK_TOP_MSDCPLL_CK, "msdcpll_ck", "msdcpll", 1, 1),
	FACTOR(CLK_TOP_MSDCPLL_D2, "msdcpll_d2", "msdcpll_ck", 1, 2),
	FACTOR(CLK_TOP_MSDCPLL_D4, "msdcpll_d4", "msdcpll_ck", 1, 4),
	FACTOR(CLK_TOP_MSDCPLL_D8, "msdcpll_d8", "msdcpll_ck", 1, 8),
};

static const char * const axi_parents[] = {
	"clk26m",
	"syspll_d7",
	"ulposc_axi_ck_mux",

Annotation

Implementation Notes