From 227c693741ce1fbf0ad146c87f03369334941f2e Mon Sep 17 00:00:00 2001 From: Stuart Yoder Date: Wed, 22 Jun 2016 16:40:42 -0500 Subject: [PATCH 179/226] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/fsl-mc/bus/mc-bus.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) --- a/drivers/staging/fsl-mc/bus/mc-bus.c +++ b/drivers/staging/fsl-mc/bus/mc-bus.c @@ -82,10 +82,35 @@ static int fsl_mc_bus_uevent(struct devi 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 = { .name = "fsl-mc", .match = fsl_mc_bus_match, .uevent = fsl_mc_bus_uevent, + .dev_groups = fsl_mc_dev_groups, }; EXPORT_SYMBOL_GPL(fsl_mc_bus_type);