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mfd: ab8500-debugfs: Allow number of IRQs to be provided more dynamically 

With the introduction of new AB* platforms, it's important to allow
as much code reuse as possible. By allowing a system's number of IRQs
to be dynamically passed, we can reuse almost all of the -debugfs
driver.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
This commit is contained in:
Linus Walleij 2012-02-03 11:19:05 +01:00 committed by Lee Jones
parent 1d843a6c8c
commit ddba25f17d
1 changed files with 41 additions and 10 deletions
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51
drivers/mfd/ab8500-debugfs.c
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@ -94,10 +94,11 @@ static u32 debug_address;
static int irq_first; static int irq_first;
static int irq_last; static int irq_last;
static u32 irq_count[AB8500_NR_IRQS]; static u32 *irq_count;
static int num_irqs;
static struct device_attribute *dev_attr[AB8500_NR_IRQS]; static struct device_attribute **dev_attr;
static char *event_name[AB8500_NR_IRQS]; static char **event_name;
/** /**
* struct ab8500_reg_range * struct ab8500_reg_range
@ -483,7 +484,7 @@ static irqreturn_t ab8500_debug_handler(int irq, void *data)
struct kobject *kobj = (struct kobject *)data; struct kobject *kobj = (struct kobject *)data;
unsigned int irq_abb = irq - irq_first; unsigned int irq_abb = irq - irq_first;
if (irq_abb < AB8500_NR_IRQS) if (irq_abb < num_irqs)
irq_count[irq_abb]++; irq_count[irq_abb]++;
/* /*
* This makes it possible to use poll for events (POLLPRI | POLLERR) * This makes it possible to use poll for events (POLLPRI | POLLERR)
@ -1340,7 +1341,7 @@ static ssize_t show_irq(struct device *dev,
return err; return err;
irq_index = name - irq_first; irq_index = name - irq_first;
if (irq_index >= AB8500_NR_IRQS) if (irq_index >= num_irqs)
return -EINVAL; return -EINVAL;
else else
return sprintf(buf, "%u\n", irq_count[irq_index]); return sprintf(buf, "%u\n", irq_count[irq_index]);
@ -1376,7 +1377,7 @@ static ssize_t ab8500_subscribe_write(struct file *file,
} }
irq_index = user_val - irq_first; irq_index = user_val - irq_first;
if (irq_index >= AB8500_NR_IRQS) if (irq_index >= num_irqs)
return -EINVAL; return -EINVAL;
/* /*
@ -1440,7 +1441,7 @@ static ssize_t ab8500_unsubscribe_write(struct file *file,
} }
irq_index = user_val - irq_first; irq_index = user_val - irq_first;
if (irq_index >= AB8500_NR_IRQS) if (irq_index >= num_irqs)
return -EINVAL; return -EINVAL;
/* Set irq count to 0 when unsubscribe */ /* Set irq count to 0 when unsubscribe */
@ -1521,21 +1522,40 @@ static struct dentry *ab8500_gpadc_dir;
static int ab8500_debug_probe(struct platform_device *plf) static int ab8500_debug_probe(struct platform_device *plf)
{ {
struct dentry *file; struct dentry *file;
int ret = -ENOMEM;
struct ab8500 *ab8500;
debug_bank = AB8500_MISC; debug_bank = AB8500_MISC;
debug_address = AB8500_REV_REG & 0x00FF; debug_address = AB8500_REV_REG & 0x00FF;
ab8500 = dev_get_drvdata(plf->dev.parent);
num_irqs = ab8500->mask_size;
irq_count = kzalloc(sizeof(irq_count)*num_irqs, GFP_KERNEL);
if (!irq_count)
return -ENOMEM;
dev_attr = kzalloc(sizeof(*dev_attr)*num_irqs,GFP_KERNEL);
if (!dev_attr)
goto out_freeirq_count;
event_name = kzalloc(sizeof(*event_name)*num_irqs, GFP_KERNEL);
if (!event_name)
goto out_freedev_attr;
irq_first = platform_get_irq_byname(plf, "IRQ_FIRST"); irq_first = platform_get_irq_byname(plf, "IRQ_FIRST");
if (irq_first < 0) { if (irq_first < 0) {
dev_err(&plf->dev, "First irq not found, err %d\n", dev_err(&plf->dev, "First irq not found, err %d\n",
irq_first); irq_first);
return irq_first; ret = irq_first;
goto out_freeevent_name;
} }
irq_last = platform_get_irq_byname(plf, "IRQ_LAST"); irq_last = platform_get_irq_byname(plf, "IRQ_LAST");
if (irq_last < 0) { if (irq_last < 0) {
dev_err(&plf->dev, "Last irq not found, err %d\n", dev_err(&plf->dev, "Last irq not found, err %d\n",
irq_last); irq_last);
return irq_last; ret = irq_last;
goto out_freeevent_name;
} }
ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL); ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
@ -1658,12 +1678,23 @@ err:
if (ab8500_dir) if (ab8500_dir)
debugfs_remove_recursive(ab8500_dir); debugfs_remove_recursive(ab8500_dir);
dev_err(&plf->dev, "failed to create debugfs entries.\n"); dev_err(&plf->dev, "failed to create debugfs entries.\n");
return -ENOMEM; out_freeevent_name:
kfree(event_name);
out_freedev_attr:
kfree(dev_attr);
out_freeirq_count:
kfree(irq_count);
return ret;
} }
static int ab8500_debug_remove(struct platform_device *plf) static int ab8500_debug_remove(struct platform_device *plf)
{ {
debugfs_remove_recursive(ab8500_dir); debugfs_remove_recursive(ab8500_dir);
kfree(event_name);
kfree(dev_attr);
kfree(irq_count);
return 0; return 0;
} }