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soc: qcom: documentation: Update SMD/RPM Docs

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This patch moves the qcom,smd-rpm.txt to the correct location and splits
out the smd and rpm documentation.  In addition, a smd-rpm-regulator
document is added.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Gross 2015-12-14 23:30:43 -06:00 committed by Mark Brown
parent 8005c49d9a
commit 7a40058589
2 changed files with 68 additions and 21 deletions
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31
Documentation/devicetree/bindings/soc/qcom,smd-rpm.txt → Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.txt
View File

@ -1,27 +1,17 @@
Qualcomm Resource Power Manager (RPM) over SMD
QCOM SMD RPM REGULATOR
This driver is used to interface with the Resource Power Manager (RPM) found in
various Qualcomm platforms. The RPM allows each component in the system to vote
for state of the system resources, such as clocks, regulators and bus
frequencies.
The Qualcomm RPM over SMD regulator is modelled as a subdevice of the RPM.
Because SMD is used as the communication transport mechanism, the RPM resides as
a subnode of the SMD. As such, the SMD-RPM regulator requires that the SMD and
RPM nodes be present.
- compatible:
Usage: required
Value type: <string>
Definition: must be one of:
"qcom,rpm-msm8974"
Please refer to Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt for
information pertaining to the SMD node.
- qcom,smd-channels:
Usage: required
Value type: <stringlist>
Definition: Shared Memory channel used for communication with the RPM
Please refer to Documentation/devicetree/bindings/soc/qcom/qcom,smd-rpm.txt for
information regarding the RPM node.
= SUBDEVICES
The RPM exposes resources to its subnodes. The below bindings specify the set
of valid subnodes that can operate on these resources.
== Regulators
== Regulator
Regulator nodes are identified by their compatible:
@ -114,4 +104,3 @@ see regulator.txt.
};
};
};

58
Documentation/devicetree/bindings/soc/qcom/qcom,smd-rpm.txt Normal file
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@ -0,0 +1,58 @@
Qualcomm Resource Power Manager (RPM) over SMD
This driver is used to interface with the Resource Power Manager (RPM) found in
various Qualcomm platforms. The RPM allows each component in the system to vote
for state of the system resources, such as clocks, regulators and bus
frequencies.
The SMD information for the RPM edge should be filled out. See qcom,smd.txt for
the required edge properties. All SMD related properties will reside within the
RPM node itself.
= SUBDEVICES
The RPM exposes resources to its subnodes. The rpm_requests node must be
present and this subnode may contain children that designate regulator
resources.
- compatible:
Usage: required
Value type: <string>
Definition: must be one of:
"qcom,rpm-apq8084"
"qcom,rpm-msm8916"
"qcom,rpm-msm8974"
- qcom,smd-channels:
Usage: required
Value type: <string>
Definition: must be "rpm_requests"
Refer to Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.txt
for information on the regulator subnodes that can exist under the rpm_requests.
Example:
soc {
apcs: syscon@f9011000 {
compatible = "syscon";
reg = <0xf9011000 0x1000>;
};
};
smd {
compatible = "qcom,smd";
rpm {
interrupts = <0 168 1>;
qcom,ipc = <&apcs 8 0>;
qcom,smd-edge = <15>;
rpm_requests {
compatible = "qcom,rpm-msm8974";
qcom,smd-channels = "rpm_requests";
...
};
};
};