These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / hwlock / qcom-hwspinlock.txt

diff --git a/kernel/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt b/kernel/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt
new file mode 100644 (file)
index 0000000..4563f52
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt
@@ -0,0 +1,39 @@
+Qualcomm Hardware Mutex Block:
+
+The hardware block provides mutexes utilized between different processors on
+the SoC as part of the communication protocol used by these processors.
+
+- compatible:
+       Usage: required
+       Value type: <string>
+       Definition: must be one of:
+                   "qcom,sfpb-mutex",
+                   "qcom,tcsr-mutex"
+
+- syscon:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: one cell containing:
+                   syscon phandle
+                   offset of the hwmutex block within the syscon
+                   stride of the hwmutex registers
+
+- #hwlock-cells:
+       Usage: required
+       Value type: <u32>
+       Definition: must be 1, the specified cell represent the lock id
+                   (hwlock standard property, see hwlock.txt)
+
+Example:
+
+       tcsr_mutex_block: syscon@fd484000 {
+               compatible = "syscon";
+               reg = <0xfd484000 0x2000>;
+       };
+
+       hwlock@fd484000 {
+               compatible = "qcom,tcsr-mutex";
+               syscon = <&tcsr_mutex_block 0 0x80>;
+
+               #hwlock-cells = <1>;
+       };