diff options
Diffstat (limited to 'arch/arm/mach-omap2/pm-debug.c')
| -rw-r--r-- | arch/arm/mach-omap2/pm-debug.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c new file mode 100644 index 0000000000..b43eab9879 --- /dev/null +++ b/arch/arm/mach-omap2/pm-debug.c @@ -0,0 +1,244 @@ +// 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; + + if (pwrdm->state != pwrdm_read_pwrst(pwrdm)) + printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n", + pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm)); + + seq_printf(s, "%s (%s)", pwrdm->name, + pwrdm_state_names[pwrdm->state]); + for (i = 0; i < PWRDM_MAX_PWRSTS; i++) + seq_printf(s, ",%s:%d", pwrdm_state_names[i], + pwrdm->state_counter[i]); + + seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter); + for (i = 0; i < pwrdm->banks; i++) + seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1, + pwrdm->ret_mem_off_counter[i]); + + seq_putc(s, '\n'); + return 0; +} + +static int pwrdm_dbg_show_timer(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; + + pwrdm_state_switch(pwrdm); + + seq_printf(s, "%s (%s)", pwrdm->name, + pwrdm_state_names[pwrdm->state]); + + for (i = 0; i < 4; i++) + seq_printf(s, ",%s:%lld", pwrdm_state_names[i], + pwrdm->state_timer[i]); + + seq_putc(s, '\n'); + return 0; +} + +static int pm_dbg_counters_show(struct seq_file *s, void *unused) +{ + pwrdm_for_each(pwrdm_dbg_show_counter, s); + clkdm_for_each(clkdm_dbg_show_counter, s); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(pm_dbg_counters); + +static int pm_dbg_timers_show(struct seq_file *s, void *unused) +{ + pwrdm_for_each(pwrdm_dbg_show_timer, s); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(pm_dbg_timers); + +static int pwrdm_suspend_get(void *data, u64 *val) +{ + int ret = -EINVAL; + + if (cpu_is_omap34xx()) + ret = omap3_pm_get_suspend_state((struct powerdomain *)data); + *val = ret; + + if (ret >= 0) + return 0; + return *val; +} + +static int pwrdm_suspend_set(void *data, u64 val) +{ + if (cpu_is_omap34xx()) + return omap3_pm_set_suspend_state( + (struct powerdomain *)data, (int)val); + return -EINVAL; +} + +DEFINE_DEBUGFS_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get, + pwrdm_suspend_set, "%llu\n"); + +static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir) +{ + int i; + s64 t; + struct dentry *d; + + t = sched_clock(); + + for (i = 0; i < 4; i++) + pwrdm->state_timer[i] = 0; + + pwrdm->timer = t; + + if (strncmp(pwrdm->name, "dpll", 4) == 0) + return 0; + + d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir); + debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d, pwrdm, + &pwrdm_suspend_fops); + + return 0; +} + +static int option_get(void *data, u64 *val) +{ + u32 *option = data; + + *val = *option; + + return 0; +} + +static int option_set(void *data, u64 val) +{ + u32 *option = data; + + *option = val; + + if (option == &enable_off_mode) { + if (cpu_is_omap34xx()) + omap3_pm_off_mode_enable(val); + } + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n"); + +static int __init pm_dbg_init(void) +{ + struct dentry *d; + + if (pm_dbg_init_done) + return 0; + + d = debugfs_create_dir("pm_debug", NULL); + + debugfs_create_file("count", 0444, d, NULL, &pm_dbg_counters_fops); + debugfs_create_file("time", 0444, d, NULL, &pm_dbg_timers_fops); + + pwrdm_for_each(pwrdms_setup, (void *)d); + + debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d, + &enable_off_mode, &pm_dbg_option_fops); + pm_dbg_init_done = 1; + + return 0; +} +omap_arch_initcall(pm_dbg_init); + +#endif |