diff options
| author | Bengt Jonsson <bengt.g.jonsson@stericsson.com> | 2012-02-14 13:01:00 +0100 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:01:38 +0200 |
| commit | 34fce062ec003181a2c9a4648bc2e722c8fde847 (patch) | |
| tree | 653bbe370fe14e733f7eb4a3910fc6f6da6de71b | |
| parent | 4cf150e81720126af51dce617e53266ebc6be727 (diff) | |
ab8500: mfd: Add interrupt debug
This patch adds an entry in debugfs to check number
of interrupts from the AB.
ST-Ericsson ID: 366316
ST-Ericsson Linux next: -
ST-Ericsson FOSS-OUT ID: Trivial
Change-Id: I09d391e7d755773f7438fa1263371145ba91c1f1
Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/49036
Reviewed-by: Rabin VINCENT <rabin.vincent@stericsson.com>
| -rw-r--r-- | drivers/mfd/ab8500-core.c | 1 | ||||
| -rw-r--r-- | drivers/mfd/ab8500-debugfs.c | 49 | ||||
| -rw-r--r-- | include/linux/mfd/abx500/ab8500.h | 2 |
3 files changed, 52 insertions, 0 deletions
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index 0542381185b..e92f51b1136 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -358,6 +358,7 @@ static irqreturn_t ab8500_irq(int irq, void *dev) int line = i * 8 + bit; handle_nested_irq(ab8500->irq_base + line); + 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 7f893aeba22..1db6bcff114 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, } /* + * 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) @@ -1485,6 +1514,14 @@ 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, @@ -1588,6 +1625,18 @@ 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-subscribe", (S_IRUGO | S_IWUGO), ab8500_dir, &plf->dev, &ab8500_subscribe_fops); if (!file) diff --git a/include/linux/mfd/abx500/ab8500.h b/include/linux/mfd/abx500/ab8500.h index 8d2a57e2fa7..7e056197b98 100644 --- a/include/linux/mfd/abx500/ab8500.h +++ b/include/linux/mfd/abx500/ab8500.h @@ -349,8 +349,10 @@ 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 */ |