layerscape: add ls1088ardb device support

[openwrt/openwrt.git] / target / linux / layerscape / patches-4.4 / 7191-staging-fsl-mc-bus-rescan-attribute-to-sync-kernel-w.patch

diff --git a/target/linux/layerscape/patches-4.4/7191-staging-fsl-mc-bus-rescan-attribute-to-sync-kernel-w.patch b/target/linux/layerscape/patches-4.4/7191-staging-fsl-mc-bus-rescan-attribute-to-sync-kernel-w.patch
new file mode 100644 (file)
index 0000000..d89815d
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/7191-staging-fsl-mc-bus-rescan-attribute-to-sync-kernel-w.patch
@@ -0,0 +1,78 @@
+From 417d71b1e291725c01893bf1553478924d05952f Mon Sep 17 00:00:00 2001
+From: Lijun Pan <Lijun.Pan@freescale.com>
+Date: Mon, 8 Feb 2016 17:40:16 -0600
+Subject: [PATCH 191/226] staging: fsl-mc: bus rescan attribute to sync kernel
+ with MC
+
+Introduce the rescan attribute as a bus attribute to
+synchronize the fsl-mc bus objects and the MC firmware.
+
+To rescan the fsl-mc bus, e.g.,
+echo 1 > /sys/bus/fsl-mc/rescan
+
+Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
+---
+ drivers/staging/fsl-mc/bus/mc-bus.c |   47 +++++++++++++++++++++++++++++++++++
+ 1 file changed, 47 insertions(+)
+
+--- a/drivers/staging/fsl-mc/bus/mc-bus.c
++++ b/drivers/staging/fsl-mc/bus/mc-bus.c
+@@ -139,11 +139,58 @@ static const struct attribute_group *fsl
+       NULL,
+ };
+ 
++static int scan_fsl_mc_bus(struct device *dev, void *data)
++{
++      unsigned int irq_count;
++      struct fsl_mc_device *root_mc_dev;
++      struct fsl_mc_bus *root_mc_bus;
++
++      if (fsl_mc_is_root_dprc(dev)) {
++              root_mc_dev = to_fsl_mc_device(dev);
++              root_mc_bus = to_fsl_mc_bus(root_mc_dev);
++              mutex_lock(&root_mc_bus->scan_mutex);
++              dprc_scan_objects(root_mc_dev, &irq_count);
++              mutex_unlock(&root_mc_bus->scan_mutex);
++      }
++
++      return 0;
++}
++
++static ssize_t bus_rescan_store(struct bus_type *bus,
++                              const char *buf, size_t count)
++{
++      unsigned long val;
++
++      if (kstrtoul(buf, 0, &val) < 0)
++              return -EINVAL;
++
++      if (val)
++              bus_for_each_dev(bus, NULL, NULL, scan_fsl_mc_bus);
++
++      return count;
++}
++static BUS_ATTR(rescan, (S_IWUSR | S_IWGRP), NULL, bus_rescan_store);
++
++static struct attribute *fsl_mc_bus_attrs[] = {
++      &bus_attr_rescan.attr,
++      NULL,
++};
++
++static const struct attribute_group fsl_mc_bus_group = {
++      .attrs = fsl_mc_bus_attrs,
++};
++
++static const struct attribute_group *fsl_mc_bus_groups[] = {
++      &fsl_mc_bus_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,
++      .bus_groups = fsl_mc_bus_groups,
+ };
+ EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
+