staging/iio: (iio_hwmon) Add support for sysfs name attribute

The 'name' attribute is mandatory for hwmon devices.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/iio_hwmon.c b/drivers/staging/iio/iio_hwmon.c
index fba8605..a9f3b64 100644 (file)
--- a/drivers/staging/iio/iio_hwmon.c
+++ b/drivers/staging/iio/iio_hwmon.c
@@ -55,6 +55,14 @@ static ssize_t iio_hwmon_read_val(struct device *dev,
        return sprintf(buf, "%d\n", result);
 }
 
+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
+                        char *buf)
+{
+       return sprintf(buf, "iio_hwmon\n");
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
 static int iio_hwmon_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
@@ -77,7 +85,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
                st->num_channels++;
 
        st->attrs = devm_kzalloc(dev,
-                                sizeof(*st->attrs) * (st->num_channels + 1),
+                                sizeof(*st->attrs) * (st->num_channels + 2),
                                 GFP_KERNEL);
        if (st->attrs == NULL) {
                ret = -ENOMEM;
@@ -125,7 +133,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
                a->index = i;
                st->attrs[i] = &a->dev_attr.attr;
        }
-
+       st->attrs[st->num_channels] = &dev_attr_name.attr;
        st->attr_group.attrs = st->attrs;
        platform_set_drvdata(pdev, st);
        ret = sysfs_create_group(&dev->kobj, &st->attr_group);