target/linux/layerscape/patches-4.4/7179-staging-fsl-mc-add-support-for-the-modalias-sysfs-at.patch

   1 From 227c693741ce1fbf0ad146c87f03369334941f2e Mon Sep 17 00:00:00 2001
   2 From: Stuart Yoder <stuart.yoder@nxp.com>
   3 Date: Wed, 22 Jun 2016 16:40:42 -0500
   4 Subject: [PATCH 179/226] staging: fsl-mc: add support for the modalias sysfs
   5  attribute
   6
   7 In order to support uevent based module loading implement modalias support
   8 for the fsl-mc bus driver. Aliases are based on vendor and object/device
   9 id and are of the form "fsl-mc:vNdN".
  10
  11 Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
  12 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  13 ---
  14  drivers/staging/fsl-mc/bus/mc-bus.c |   25 +++++++++++++++++++++++++
  15  1 file changed, 25 insertions(+)
  16
  17 --- a/drivers/staging/fsl-mc/bus/mc-bus.c
  18 +++ b/drivers/staging/fsl-mc/bus/mc-bus.c
  19 @@ -82,10 +82,35 @@ static int fsl_mc_bus_uevent(struct devi
  20         return 0;
  21  }
  22
  23 +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
  24 +                            char *buf)
  25 +{
  26 +       struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
  27 +
  28 +       return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
  29 +                      mc_dev->obj_desc.type);
  30 +}
  31 +static DEVICE_ATTR_RO(modalias);
  32 +
  33 +static struct attribute *fsl_mc_dev_attrs[] = {
  34 +       &dev_attr_modalias.attr,
  35 +       NULL,
  36 +};
  37 +
  38 +static const struct attribute_group fsl_mc_dev_group = {
  39 +       .attrs = fsl_mc_dev_attrs,
  40 +};
  41 +
  42 +static const struct attribute_group *fsl_mc_dev_groups[] = {
  43 +       &fsl_mc_dev_group,
  44 +       NULL,
  45 +};
  46 +
  47  struct bus_type fsl_mc_bus_type = {
  48         .name = "fsl-mc",
  49         .match = fsl_mc_bus_match,
  50         .uevent = fsl_mc_bus_uevent,
  51 +       .dev_groups = fsl_mc_dev_groups,
  52  };
  53  EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
  54