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ARM: tegra: irq: Add debugfs file to show wake irqs

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Change-Id: I66124275869d5f83024937010e14018b7980bb05
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-10-23 23:22:07 -07:00
parent dccfbe43e3
commit 73fd3806b4
1 changed files with 66 additions and 0 deletions
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66
arch/arm/mach-tegra/irq.c
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@@ -19,10 +19,12 @@
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/seq_file.h>
#include <asm/hardware/gic.h>
@@ -46,6 +48,8 @@ static u32 tegra_lp0_wake_enb;
static u32 tegra_lp0_wake_level;
static u32 tegra_lp0_wake_level_any;
static unsigned int tegra_wake_irq_count[32];
/* ensures that sufficient time is passed for a register write to
* serialize into the 32KHz domain */
static void pmc_32kwritel(u32 val, unsigned long offs)
@@ -165,6 +169,8 @@ static void tegra_irq_handle_wake(void)
pr_info("Resume caused by WAKE%d, %s\n", wake,
desc->action->name);
tegra_wake_irq_count[wake]++;
generic_handle_irq(irq);
}
}
@@ -255,3 +261,63 @@ void tegra_irq_resume(void)
tegra_legacy_irq_resume();
tegra_irq_handle_wake();
}
#ifdef CONFIG_DEBUG_FS
static int tegra_wake_irq_debug_show(struct seq_file *s, void *data)
{
int wake;
int irq;
struct irq_desc *desc;
const char *irq_name;
seq_printf(s, "wake irq count name\n");
seq_printf(s, "----------------------\n");
for (wake = 0; wake < 32; wake++) {
irq = tegra_wake_to_irq(wake);
if (irq < 0)
continue;
desc = irq_to_desc(irq);
if (tegra_wake_irq_count[wake] == 0 && desc->action == NULL)
continue;
if (!(desc->status & IRQ_WAKEUP))
continue;
irq_name = (desc->action && desc->action->name) ?
desc->action->name : "???";
seq_printf(s, "%4d %3d %5d %s\n",
wake, irq, tegra_wake_irq_count[wake], irq_name);
}
return 0;
}
static int tegra_wake_irq_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, tegra_wake_irq_debug_show, NULL);
}
static const struct file_operations tegra_wake_irq_debug_fops = {
.open = tegra_wake_irq_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init tegra_irq_debug_init(void)
{
struct dentry *d;
d = debugfs_create_file("wake_irq", 0755, NULL, NULL,
&tegra_wake_irq_debug_fops);
if (!d) {
pr_info("Failed to create suspend_mode debug file\n");
return -ENOMEM;
}
return 0;
}
late_initcall(tegra_irq_debug_init);
#endif