staging: fsl-mc: add support for the modalias sysfs attribute
In order to support uevent based module loading implement modalias support for the fsl-mc bus driver. Aliases are based on vendor and object/device id and are of the form "fsl-mc:vNdN". Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -82,10 +82,35 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
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return 0;
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}
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static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
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mc_dev->obj_desc.type);
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}
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static DEVICE_ATTR_RO(modalias);
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static struct attribute *fsl_mc_dev_attrs[] = {
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&dev_attr_modalias.attr,
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NULL,
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};
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static const struct attribute_group fsl_mc_dev_group = {
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.attrs = fsl_mc_dev_attrs,
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};
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static const struct attribute_group *fsl_mc_dev_groups[] = {
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&fsl_mc_dev_group,
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NULL,
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};
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struct bus_type fsl_mc_bus_type = {
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.name = "fsl-mc",
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.match = fsl_mc_bus_match,
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.uevent = fsl_mc_bus_uevent,
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.dev_groups = fsl_mc_dev_groups,
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};
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EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
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