Commit 5b5711f0 authored by Bjorn Andersson's avatar Bjorn Andersson Committed by Ohad Ben-Cohen

DT: hwspinlock: Add binding documentation for Qualcomm hwmutex

Add binding documentation for the Qualcomm Hardware Mutex.
Signed-off-by: 's avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: 's avatarKumar Gala <galak@codeaurora.org>
Reviewed-by: 's avatarAndy Gross <agross@codeaurora.org>
Reviewed-by: 's avatarJeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: 's avatarOhad Ben-Cohen <ohad@wizery.com>
parent 65bd4341
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>;
};
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