diff options
| author | Mattias Wallin <mattias.wallin@stericsson.com> | 2010-12-02 15:09:36 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2011-01-14 12:37:46 +0100 |
| commit | cca69b67b3ba954ed8642583295b51933f902227 (patch) | |
| tree | 1cbb3c0b270e6ef89f627e46779ddd75f602e550 /drivers/mfd | |
| parent | 6bce7bf1a1f8a79a57ff69910c115e1d2ed8913d (diff) | |
| download | linux-cca69b67b3ba954ed8642583295b51933f902227.tar.gz | |
mfd: Export ab8500 chip id to sysfs
This patch adds a file into sysfs for reading out chip id. It has been requested for modem silent reboot. Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com> Signed-off-by: Ludovic Barre <ludovic.barre@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/ab8500-core.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index e91b5b759004..2bd4437cf331 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -436,6 +436,26 @@ static struct mfd_cell ab8500_devs[] = { }, }; +static ssize_t show_chip_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ab8500 *ab8500; + + ab8500 = dev_get_drvdata(dev); + return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); +} + +static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL); + +static struct attribute *ab8500_sysfs_entries[] = { + &dev_attr_chip_id.attr, + NULL, +}; + +static struct attribute_group ab8500_attr_group = { + .attrs = ab8500_sysfs_entries, +}; + int __devinit ab8500_init(struct ab8500 *ab8500) { struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev); @@ -510,6 +530,10 @@ int __devinit ab8500_init(struct ab8500 *ab8500) if (ret) goto out_freeirq; + ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group); + if (ret) + dev_err(ab8500->dev, "error creating sysfs entries\n"); + return ret; out_freeirq: @@ -523,6 +547,7 @@ out_removeirq: int __devexit ab8500_exit(struct ab8500 *ab8500) { + sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group); mfd_remove_devices(ab8500->dev); if (ab8500->irq_base) { free_irq(ab8500->irq, ab8500); |