From: Bengt Jonsson <bengt.g.jons...@stericsson.com>
This patch adds an entry in debugfs to check number of interrupts
from the AB.
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Signed-off-by: Bengt Jonsson <bengt.g.jons...@stericsson.com>
Reviewed-by: Rabin VINCENT <rabin.vinc...@stericsson.com>
---
drivers/mfd/ab8500-core.c | 1 +
drivers/mfd/ab8500-debugfs.c | 49 +++++++++++++++++++++++++++++++++++++
include/linux/mfd/abx500/ab8500.h | 2 ++
3 files changed, 52 insertions(+)
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 0f84fc0..580adf3 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -521,6 +521,7 @@ static irqreturn_t ab8500_irq(int irq, void *dev)
int virq = ab8500_irq_get_virq(ab8500, line);
handle_nested_irq(virq);
+ ab8500_debug_register_interrupt(line);
value &= ~(1 << bit);
} while (value);
diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index d23b6cc..8e405af 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -737,6 +737,35 @@ static ssize_t ab8500_val_write(struct file *file,
}
/*
+ * Interrupt status
+ */
+static u32 num_interrupts[AB8500_MAX_NR_IRQS];
+static int num_interrupt_lines;
+
+void ab8500_debug_register_interrupt(int line)
+{
+ if (line < num_interrupt_lines)
+ num_interrupts[line]++;
+}
+
+static int ab8500_interrupts_print(struct seq_file *s, void *p)
+{
+ int line;
+
+ seq_printf(s, "irq: number of\n");
+
+ for (line = 0; line < num_interrupt_lines; line++)
+ seq_printf(s, "%3i: %6i\n", line, num_interrupts[line]);
+
+ return 0;
+}
+
+static int ab8500_interrupts_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, ab8500_interrupts_print, inode->i_private);
+}
+
+/*
* - HWREG DB8500 formated routines
*/
static int ab8500_hwreg_print(struct seq_file *s, void *d)
@@ -1487,6 +1516,14 @@ static const struct file_operations ab8500_val_fops = {
.owner = THIS_MODULE,
};
+static const struct file_operations ab8500_interrupts_fops = {
+ .open = ab8500_interrupts_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
static const struct file_operations ab8500_subscribe_fops = {
.open = ab8500_subscribe_unsubscribe_open,
.write = ab8500_subscribe_write,
@@ -1595,6 +1632,18 @@ static int __devinit ab8500_debug_probe(struct
platform_device *plf)
if (!file)
goto err;
+ if (is_ab8500(ab8500))
+ num_interrupt_lines = AB8500_NR_IRQS;
+ else if (is_ab8505(ab8500))
+ num_interrupt_lines = AB8505_NR_IRQS;
+ else if (is_ab9540(ab8500))
+ num_interrupt_lines = AB9540_NR_IRQS;
+
+ file = debugfs_create_file("interrupts", (S_IRUGO),
+ ab8500_dir, &plf->dev, &ab8500_interrupts_fops);
+ if (!file)
+ goto err;
+
file = debugfs_create_file("irq-unsubscribe", (S_IRUGO | S_IWUSR),
ab8500_dir, &plf->dev, &ab8500_unsubscribe_fops);
if (!file)
diff --git a/include/linux/mfd/abx500/ab8500.h
b/include/linux/mfd/abx500/ab8500.h
index 4c8d966..83de910 100644
--- a/include/linux/mfd/abx500/ab8500.h
+++ b/include/linux/mfd/abx500/ab8500.h
@@ -347,8 +347,10 @@ static inline int is_ab8500_2p0(struct ab8500 *ab)
#ifdef CONFIG_AB8500_DEBUG
void ab8500_dump_all_banks(struct device *dev);
+void ab8500_debug_register_interrupt(int line);
#else
static inline void ab8500_dump_all_banks(struct device *dev) {}
+static inline void ab8500_debug_register_interrupt(int line) {}
#endif
#endif /* MFD_AB8500_H */
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
