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Subject[PATCH v2 15/28] ARM: tegra: irq: Add debugfs file to show wake irqs
Date
Signed-off-by: Colin Cross <ccross@android.com>
---
v2: Fix permissions on debufs file

arch/arm/mach-tegra/irq.c | 66 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 66 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index c292d3b..12c62a8 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -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);
}
}
@@ -242,3 +248,63 @@ 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", S_IRUGO, 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
--
1.7.3.1


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