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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>
39 lines
915 B
Text
39 lines
915 B
Text
Qualcomm Hardware Mutex Block:
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The hardware block provides mutexes utilized between different processors on
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the SoC as part of the communication protocol used by these processors.
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- compatible:
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Usage: required
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Value type: <string>
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Definition: must be one of:
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"qcom,sfpb-mutex",
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"qcom,tcsr-mutex"
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- syscon:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: one cell containing:
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syscon phandle
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offset of the hwmutex block within the syscon
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stride of the hwmutex registers
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- #hwlock-cells:
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Usage: required
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Value type: <u32>
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Definition: must be 1, the specified cell represent the lock id
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(hwlock standard property, see hwlock.txt)
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Example:
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tcsr_mutex_block: syscon@fd484000 {
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compatible = "syscon";
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reg = <0xfd484000 0x2000>;
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};
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hwlock@fd484000 {
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compatible = "qcom,tcsr-mutex";
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syscon = <&tcsr_mutex_block 0 0x80>;
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#hwlock-cells = <1>;
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};
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