qdsp-start: add support for 4.9 remoteproc implementation

In kernel 4.9 (and upstream) the remoteproc implementation was changed, and we
should now use /sys/class/remoteproc instead of debugfs. This patch adds
supports for remoteproc instances in /sys/class/remoteproc and falls back to the
old implementation, so that it should be backward compatible.

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>

1 files changed, 17 insertions, 6 deletions

diff --git a/qdsp-start b/qdsp-start
index 17bc58d..611eba7 100755
--- a/qdsp-start
+++ b/qdsp-start
@@ -1,18 +1,29 @@
 #!/bin/sh
 
 # check if we have a qDSP available on the platform
-found=0
+
+# new implementation of remoteproc use /sys/class/remoteproc
+# instead of debugfs
+for f in $(ls -d /sys/class/remoteproc/* 2> /dev/null); do
+    device=$(readlink -f "$f"/device)
+    name=$(basename "$device")
+    if [ "${name%.hexagon}" != "$name" ] ; then
+        echo "Found Hexagon at $f"
+        echo start > "$f"/state
+        exit
+    fi
+done
+
 for f in $(ls /sys/kernel/debug/remoteproc/*/name 2> /dev/null); do
     name=$(cat "$f")
     if [ "${name%.hexagon}" != "$name" ] ; then
         f=$(dirname "$f")
         echo "Found Hexagon at $f"
-        found=1
-        break
+        echo start > "$f"/state
+        exit
     fi
 done
 
-# no, then move on..
-[ $found -eq 0 ] && exit
+# no found, then move on..
+exit
 
-echo start > "$f"/state