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>
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6bce7bf1a1
Коммит
cca69b67b3
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@ -436,6 +436,26 @@ static struct mfd_cell ab8500_devs[] = {
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},
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};
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static ssize_t show_chip_id(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ab8500 *ab8500;
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ab8500 = dev_get_drvdata(dev);
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return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
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}
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static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
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static struct attribute *ab8500_sysfs_entries[] = {
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&dev_attr_chip_id.attr,
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NULL,
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};
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static struct attribute_group ab8500_attr_group = {
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.attrs = ab8500_sysfs_entries,
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};
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int __devinit ab8500_init(struct ab8500 *ab8500)
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{
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struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
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@ -510,6 +530,10 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
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if (ret)
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goto out_freeirq;
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ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group);
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if (ret)
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dev_err(ab8500->dev, "error creating sysfs entries\n");
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return ret;
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out_freeirq:
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@ -523,6 +547,7 @@ out_removeirq:
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int __devexit ab8500_exit(struct ab8500 *ab8500)
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{
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sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
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mfd_remove_devices(ab8500->dev);
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if (ab8500->irq_base) {
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free_irq(ab8500->irq, ab8500);
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