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mfd: ab8500-debugfs: Add interrupt debug

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This patch adds an entry in debugfs to check number of interrupts
from the AB.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-by: Rabin VINCENT <rabin.vincent@stericsson.com>
This commit is contained in:
Bengt Jonsson 2012-02-14 13:01:00 +01:00 committed by Lee Jones
parent 20bf428329
commit 8f0eb43be5
3 changed files with 52 additions and 0 deletions
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1
drivers/mfd/ab8500-core.c
View File

@ -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);

49
drivers/mfd/ab8500-debugfs.c
View File

@ -736,6 +736,35 @@ static ssize_t ab8500_val_write(struct file *file,
return count;
}
/*
* 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
*/
@ -1489,6 +1518,14 @@ 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,
@ -1597,6 +1634,18 @@ static int 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)

2
include/linux/mfd/abx500/ab8500.h
View File

@ -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 */