Add binding documentation for the Qualcomm Hardware Mutex. Reviewed-by: Andy Gross <agross@xxxxxxxxxxxxxx> Reviewed-by: Jeffrey Hugo <jhugo@xxxxxxxxxxxxxx> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx> --- Changes since v7: - Corrected address, compatible and naming of the tcsr block Changes since v6: - Corrected indentation error in example Changes since v5: - Extracted the dt binding documentation into a separate patch - Moved the driver to consume a syscon - Dropped previously suggested generic hwlock dt bindings .../devicetree/bindings/hwlock/qcom-hwspinlock.txt | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt new file mode 100644 index 0000000..4563f52 --- /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: <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>; + }; -- 1.8.2.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html