From 8f0eb43be5f461a28341fe724686f265b0719dd3 Mon Sep 17 00:00:00 2001 From: Bengt Jonsson Date: Tue, 14 Feb 2012 13:01:00 +0100 Subject: mfd: ab8500-debugfs: Add interrupt debug This patch adds an entry in debugfs to check number of interrupts from the AB. Signed-off-by: Lee Jones Signed-off-by: Bengt Jonsson Reviewed-by: Rabin VINCENT --- drivers/mfd/ab8500-debugfs.c | 49 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'drivers/mfd/ab8500-debugfs.c') diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c index 8617b132e730..cbebbd7e7b40 100644 --- a/drivers/mfd/ab8500-debugfs.c +++ b/drivers/mfd/ab8500-debugfs.c @@ -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) -- cgit v1.2.3