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Commit 8f0eb43b authored by Bengt Jonsson's avatar Bengt Jonsson Committed by Lee Jones
Browse files

mfd: ab8500-debugfs: Add interrupt debug 



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

Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarBengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-by: default avatarRabin VINCENT <rabin.vincent@stericsson.com>
parent 20bf4283

drivers/mfd/ab8500-core.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/mfd/ab8500-debugfs.c

+49 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/mfd/abx500/ab8500.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */