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author | Lina Iyer <lina.iyer@linaro.org> | 2015-03-25 14:25:27 -0600 |
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committer | Olof Johansson <olof@lixom.net> | 2015-04-03 13:33:51 -0700 |
commit | 005c5dc9b3dd72970992d05ea63f1148d020112c (patch) | |
tree | caabc322d3f47deae6cec0a6bc66065460fed2b5 /Documentation/devicetree/bindings/arm/msm | |
parent | 83bd147952ef5c8a99df27b8597ee21f2424348d (diff) | |
download | op-kernel-dev-005c5dc9b3dd72970992d05ea63f1148d020112c.zip op-kernel-dev-005c5dc9b3dd72970992d05ea63f1148d020112c.tar.gz |
devicetree: bindings: Update qcom,saw2 node bindings
Update qcom,saw2 node bindings with compatible strings to identify nodes
that provides cpuidle functionality for a particular SoC. Remove
unused compatible strings.
Update examples for different SAW nodes.
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/msm')
-rw-r--r-- | Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt b/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt index 1505fb8..ae4afc6 100644 --- a/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt +++ b/Documentation/devicetree/bindings/arm/msm/qcom,saw2.txt @@ -2,22 +2,31 @@ SPM AVS Wrapper 2 (SAW2) The SAW2 is a wrapper around the Subsystem Power Manager (SPM) and the Adaptive Voltage Scaling (AVS) hardware. The SPM is a programmable -micro-controller that transitions a piece of hardware (like a processor or +power-controller that transitions a piece of hardware (like a processor or subsystem) into and out of low power modes via a direct connection to the PMIC. It can also be wired up to interact with other processors in the system, notifying them when a low power state is entered or exited. +Multiple revisions of the SAW hardware are supported using these Device Nodes. +SAW2 revisions differ in the register offset and configuration data. Also, the +same revision of the SAW in different SoCs may have different configuration +data due the the differences in hardware capabilities. Hence the SoC name, the +version of the SAW hardware in that SoC and the distinction between cpu (big +or Little) or cache, may be needed to uniquely identify the SAW register +configuration and initialization data. The compatible string is used to +indicate this parameter. + PROPERTIES - compatible: Usage: required Value type: <string> - Definition: shall contain "qcom,saw2". A more specific value should be - one of: - "qcom,saw2-v1" - "qcom,saw2-v1.1" - "qcom,saw2-v2" - "qcom,saw2-v2.1" + Definition: Must have + "qcom,saw2" + A more specific value could be one of: + "qcom,apq8064-saw2-v1.1-cpu" + "qcom,msm8974-saw2-v2.1-cpu" + "qcom,apq8084-saw2-v2.1-cpu" - reg: Usage: required @@ -26,10 +35,23 @@ PROPERTIES the register region. An optional second element specifies the base address and size of the alias register region. +- regulator: + Usage: optional + Value type: boolean + Definition: Indicates that this SPM device acts as a regulator device + device for the core (CPU or Cache) the SPM is attached + to. -Example: +Example 1: - regulator@2099000 { + power-controller@2099000 { compatible = "qcom,saw2"; reg = <0x02099000 0x1000>, <0x02009000 0x1000>; + regulator; + }; + +Example 2: + saw0: power-controller@f9089000 { + compatible = "qcom,apq8084-saw2-v2.1-cpu", "qcom,saw2"; + reg = <0xf9089000 0x1000>, <0xf9009000 0x1000>; }; |