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author | Bjorn Andersson <bjorn.andersson@sonymobile.com> | 2015-03-24 20:11:04 +0300 |
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committer | Ohad Ben-Cohen <ohad@wizery.com> | 2015-05-02 10:17:53 +0300 |
commit | 5b5711f0f1aff1b25ee48da279de4f0c202f7a68 (patch) | |
tree | 6a5dec5e4858667fb478ce6810755b99ef189793 /Documentation/devicetree/bindings/hwlock | |
parent | 65bd4341d61678494ea14994d0d7df73644ca014 (diff) | |
download | linux-5b5711f0f1aff1b25ee48da279de4f0c202f7a68.tar.xz |
DT: hwspinlock: Add binding documentation for Qualcomm hwmutex
Add binding documentation for the Qualcomm Hardware Mutex.
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: Kumar Gala <galak@codeaurora.org>
Reviewed-by: Andy Gross <agross@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'Documentation/devicetree/bindings/hwlock')
-rw-r--r-- | Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt | 39 |
1 files changed, 39 insertions, 0 deletions
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: <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>; + }; |