drivers/clk/qcom/dispcc-sc7280.c

Source file repositories/reference/linux-study-clean/drivers/clk/qcom/dispcc-sc7280.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/qcom/dispcc-sc7280.c
Extension
.c
Size
24369 bytes
Lines
908
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) 2021-2022, The Linux Foundation. All rights reserved.
 */

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

#include <dt-bindings/clock/qcom,dispcc-sc7280.h>

#include "clk-alpha-pll.h"
#include "clk-branch.h"
#include "clk-rcg.h"
#include "clk-regmap-divider.h"
#include "common.h"
#include "gdsc.h"
#include "reset.h"

enum {
	P_BI_TCXO,
	P_DISP_CC_PLL0_OUT_EVEN,
	P_DISP_CC_PLL0_OUT_MAIN,
	P_DP_PHY_PLL_LINK_CLK,
	P_DP_PHY_PLL_VCO_DIV_CLK,
	P_DSI0_PHY_PLL_OUT_BYTECLK,
	P_DSI0_PHY_PLL_OUT_DSICLK,
	P_EDP_PHY_PLL_LINK_CLK,
	P_EDP_PHY_PLL_VCO_DIV_CLK,
	P_GCC_DISP_GPLL0_CLK,
};

static const struct pll_vco lucid_vco[] = {
	{ 249600000, 2000000000, 0 },
};

/* 1520MHz Configuration*/
static const struct alpha_pll_config disp_cc_pll0_config = {
	.l = 0x4F,
	.alpha = 0x2AAA,
	.config_ctl_val = 0x20485699,
	.config_ctl_hi_val = 0x00002261,
	.config_ctl_hi1_val = 0x329A299C,
	.user_ctl_val = 0x00000001,
	.user_ctl_hi_val = 0x00000805,
	.user_ctl_hi1_val = 0x00000000,
};

static struct clk_alpha_pll disp_cc_pll0 = {
	.offset = 0x0,
	.vco_table = lucid_vco,
	.num_vco = ARRAY_SIZE(lucid_vco),
	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID],
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_pll0",
			.parent_data = &(const struct clk_parent_data){
				.fw_name = "bi_tcxo",
			},
			.num_parents = 1,
			.ops = &clk_alpha_pll_lucid_ops,
		},
	},
};

static const struct parent_map disp_cc_parent_map_0[] = {
	{ P_BI_TCXO, 0 },
};

static const struct clk_parent_data disp_cc_parent_data_0[] = {
	{ .fw_name = "bi_tcxo" },
};

static const struct parent_map disp_cc_parent_map_1[] = {
	{ P_BI_TCXO, 0 },
	{ P_DP_PHY_PLL_LINK_CLK, 1 },
	{ P_DP_PHY_PLL_VCO_DIV_CLK, 2 },
};

static const struct clk_parent_data disp_cc_parent_data_1[] = {
	{ .fw_name = "bi_tcxo" },
	{ .fw_name = "dp_phy_pll_link_clk" },
	{ .fw_name = "dp_phy_pll_vco_div_clk" },
};

static const struct parent_map disp_cc_parent_map_2[] = {
	{ P_BI_TCXO, 0 },
	{ P_DSI0_PHY_PLL_OUT_BYTECLK, 1 },

Annotation

Implementation Notes