layerscape: add ls1088ardb device support

[openwrt/staging/yousong.git] / target / linux / layerscape / patches-4.4 / 7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch

diff --git a/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch b/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch
new file mode 100644 (file)
index 0000000..a38907b
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch
@@ -0,0 +1,59 @@
+From 75b607ff8725eac74f3375b3370f7d121d1827a3 Mon Sep 17 00:00:00 2001
+From: Lijun Pan <Lijun.Pan@freescale.com>
+Date: Mon, 8 Feb 2016 17:40:14 -0600
+Subject: [PATCH 190/226] staging: fsl-mc: root dprc rescan attribute to sync
+ kernel with MC
+
+Introduce the rescan attribute as a device attribute to
+synchronize the fsl-mc bus objects and the MC firmware.
+
+To rescan the root dprc only, e.g.
+echo 1 > /sys/bus/fsl-mc/devices/dprc.1/rescan
+
+Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
+[Stuart: resolved merge conflict]
+Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
+---
+ drivers/staging/fsl-mc/bus/mc-bus.c |   29 +++++++++++++++++++++++++++++
+ 1 file changed, 29 insertions(+)
+
+--- a/drivers/staging/fsl-mc/bus/mc-bus.c
++++ b/drivers/staging/fsl-mc/bus/mc-bus.c
+@@ -96,8 +96,37 @@ static ssize_t modalias_show(struct devi
+ }
+ static DEVICE_ATTR_RO(modalias);
+ 
++static ssize_t rescan_store(struct device *dev,
++                          struct device_attribute *attr,
++                          const char *buf, size_t count)
++{
++      unsigned long val;
++      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))
++              return -EINVAL;
++
++      root_mc_dev = to_fsl_mc_device(dev);
++      root_mc_bus = to_fsl_mc_bus(root_mc_dev);
++
++      if (kstrtoul(buf, 0, &val) < 0)
++              return -EINVAL;
++
++      if (val) {
++              mutex_lock(&root_mc_bus->scan_mutex);
++              dprc_scan_objects(root_mc_dev, &irq_count);
++              mutex_unlock(&root_mc_bus->scan_mutex);
++      }
++
++      return count;
++}
++static DEVICE_ATTR_WO(rescan);
++
+ static struct attribute *fsl_mc_dev_attrs[] = {
+       &dev_attr_modalias.attr,
++      &dev_attr_rescan.attr,
+       NULL,
+ };
+