arch/arm/mach-omap2/pm-debug.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-omap2/pm-debug.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-omap2/pm-debug.c
Extension
.c
Size
5137 bytes
Lines
245
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * OMAP Power Management debug routines
 *
 * Copyright (C) 2005 Texas Instruments, Inc.
 * Copyright (C) 2006-2008 Nokia Corporation
 *
 * Written by:
 * Richard Woodruff <r-woodruff2@ti.com>
 * Tony Lindgren
 * Juha Yrjola
 * Amit Kucheria <amit.kucheria@nokia.com>
 * Igor Stoppa <igor.stoppa@nokia.com>
 * Jouni Hogander
 *
 * Based on pm.c for omap2
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/slab.h>

#include "clock.h"
#include "powerdomain.h"
#include "clockdomain.h"

#include "soc.h"
#include "cm2xxx_3xxx.h"
#include "prm2xxx_3xxx.h"
#include "pm.h"

#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>

static int pm_dbg_init_done;

static int pm_dbg_init(void);

static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
	"OFF",
	"RET",
	"INA",
	"ON"
};

void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
{
	s64 t;

	if (!pm_dbg_init_done)
		return ;

	/* Update timer for previous state */
	t = sched_clock();

	pwrdm->state_timer[prev] += t - pwrdm->timer;

	pwrdm->timer = t;
}

static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
{
	struct seq_file *s = (struct seq_file *)user;

	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
		strncmp(clkdm->name, "dpll", 4) == 0)
		return 0;

	seq_printf(s, "%s->%s (%d)\n", clkdm->name, clkdm->pwrdm.ptr->name,
		   clkdm->usecount);

	return 0;
}

static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
{
	struct seq_file *s = (struct seq_file *)user;
	int i;

	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
		strncmp(pwrdm->name, "dpll", 4) == 0)
		return 0;

Annotation

Implementation Notes