drivers/base: Add a DEVICE_BOOL_ATTR macro
... which, analogous to DEVICE_INT_ATTR provides functionality to set/clear bools. Its purpose is to be used where values need to be used as booleans in configuration context. Next patch uses this. Signed-off-by: Borislav Petkov <bp@alien8.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Tony Luck <tony.luck@intel.com>
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@ -171,6 +171,27 @@ ssize_t device_show_int(struct device *dev,
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}
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EXPORT_SYMBOL_GPL(device_show_int);
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ssize_t device_store_bool(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t size)
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{
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struct dev_ext_attribute *ea = to_ext_attr(attr);
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if (strtobool(buf, ea->var) < 0)
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return -EINVAL;
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return size;
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}
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EXPORT_SYMBOL_GPL(device_store_bool);
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ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct dev_ext_attribute *ea = to_ext_attr(attr);
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return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var));
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}
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EXPORT_SYMBOL_GPL(device_show_bool);
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/**
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* device_release - free device structure.
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* @kobj: device's kobject.
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@ -496,6 +496,10 @@ ssize_t device_show_int(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t device_store_bool(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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#define DEVICE_ATTR(_name, _mode, _show, _store) \
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struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
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@ -505,6 +509,9 @@ ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
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#define DEVICE_INT_ATTR(_name, _mode, _var) \
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struct dev_ext_attribute dev_attr_##_name = \
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{ __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) }
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#define DEVICE_BOOL_ATTR(_name, _mode, _var) \
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struct dev_ext_attribute dev_attr_##_name = \
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{ __ATTR(_name, _mode, device_show_bool, device_store_bool), &(_var) }
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#define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \
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struct device_attribute dev_attr_##_name = \
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__ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store)
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