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From 227c693741ce1fbf0ad146c87f03369334941f2e Mon Sep 17 00:00:00 2001
From: Stuart Yoder <stuart.yoder@nxp.com>
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 <stuart.yoder@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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);
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