drivers/clk/qcom/camcc-sm6350.c

Source file repositories/reference/linux-study-clean/drivers/clk/qcom/camcc-sm6350.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/qcom/camcc-sm6350.c
Extension
.c
Size
48947 bytes
Lines
1919
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) 2022, The Linux Foundation. All rights reserved.
 * Copyright (c) 2022, Linaro Limited
 */

#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,sm6350-camcc.h>

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

enum {
	DT_BI_TCXO,
};

enum {
	P_BI_TCXO,
	P_CAMCC_PLL0_OUT_EVEN,
	P_CAMCC_PLL0_OUT_MAIN,
	P_CAMCC_PLL1_OUT_EVEN,
	P_CAMCC_PLL1_OUT_MAIN,
	P_CAMCC_PLL2_OUT_EARLY,
	P_CAMCC_PLL2_OUT_MAIN,
	P_CAMCC_PLL3_OUT_MAIN,
};

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

/* 600MHz configuration */
static const struct alpha_pll_config camcc_pll0_config = {
	.l = 0x1f,
	.alpha = 0x4000,
	.config_ctl_val = 0x20485699,
	.config_ctl_hi_val = 0x00002067,
	.test_ctl_val = 0x40000000,
	.test_ctl_hi_val = 0x00000002,
	.user_ctl_val = 0x00000101,
	.user_ctl_hi_val = 0x00004805,
};

static struct clk_alpha_pll camcc_pll0 = {
	.offset = 0x0,
	.vco_table = fabia_vco,
	.num_vco = ARRAY_SIZE(fabia_vco),
	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "camcc_pll0",
			.parent_data = &(const struct clk_parent_data){
				.index = DT_BI_TCXO,
			},
			.num_parents = 1,
			.ops = &clk_alpha_pll_fabia_ops,
		},
	},
};

static const struct clk_div_table post_div_table_camcc_pll0_out_even[] = {
	{ 0x1, 2 },
	{ }
};

static struct clk_alpha_pll_postdiv camcc_pll0_out_even = {
	.offset = 0x0,
	.post_div_shift = 8,
	.post_div_table = post_div_table_camcc_pll0_out_even,
	.num_post_div = ARRAY_SIZE(post_div_table_camcc_pll0_out_even),
	.width = 4,
	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_FABIA],
	.clkr.hw.init = &(struct clk_init_data){
		.name = "camcc_pll0_out_even",
		.parent_hws = (const struct clk_hw*[]){
			&camcc_pll0.clkr.hw,
		},
		.num_parents = 1,
		.flags = CLK_SET_RATE_PARENT,
		.ops = &clk_alpha_pll_postdiv_fabia_ops,
	},
};

Annotation

Implementation Notes