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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>
This commit is contained in:
Stuart Yoder 2016-06-22 16:40:42 -05:00 committed by Greg Kroah-Hartman
parent b3e6916d6e
commit 3d579c3508
1 changed files with 25 additions and 0 deletions
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25
drivers/staging/fsl-mc/bus/mc-bus.c
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@ -82,10 +82,35 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0; return 0;
} }
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
mc_dev->obj_desc.type);
}
static DEVICE_ATTR_RO(modalias);
static struct attribute *fsl_mc_dev_attrs[] = {
&dev_attr_modalias.attr,
NULL,
};
static const struct attribute_group fsl_mc_dev_group = {
.attrs = fsl_mc_dev_attrs,
};
static const struct attribute_group *fsl_mc_dev_groups[] = {
&fsl_mc_dev_group,
NULL,
};
struct bus_type fsl_mc_bus_type = { struct bus_type fsl_mc_bus_type = {
.name = "fsl-mc", .name = "fsl-mc",
.match = fsl_mc_bus_match, .match = fsl_mc_bus_match,
.uevent = fsl_mc_bus_uevent, .uevent = fsl_mc_bus_uevent,
.dev_groups = fsl_mc_dev_groups,
}; };
EXPORT_SYMBOL_GPL(fsl_mc_bus_type); EXPORT_SYMBOL_GPL(fsl_mc_bus_type);