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Commit cca69b67 authored by Mattias Wallin's avatar Mattias Wallin Committed by Samuel Ortiz
Browse files

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: default avatarMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: default avatarLudovic Barre <ludovic.barre@stericsson.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 6bce7bf1

drivers/mfd/ab8500-core.c

+25 −0
Original line number Diff line number Diff line
@@ -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 @@ int __devinit ab8500_init(struct ab8500 *ab8500) 


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);