From 5b5711f0f1aff1b25ee48da279de4f0c202f7a68 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Tue, 24 Mar 2015 10:11:04 -0700 Subject: DT: hwspinlock: Add binding documentation for Qualcomm hwmutex Add binding documentation for the Qualcomm Hardware Mutex. Signed-off-by: Bjorn Andersson Acked-by: Kumar Gala Reviewed-by: Andy Gross Reviewed-by: Jeffrey Hugo Signed-off-by: Ohad Ben-Cohen --- .../devicetree/bindings/hwlock/qcom-hwspinlock.txt | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt (limited to 'Documentation/devicetree/bindings/hwlock') diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt new file mode 100644 index 000000000000..4563f524556b --- /dev/null +++ b/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: + Definition: must be one of: + "qcom,sfpb-mutex", + "qcom,tcsr-mutex" + +- syscon: + Usage: required + Value type: + 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: + 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>; + }; -- cgit v1.2.3