[PATCH v7 10/14] dt-bindings: qcom_spmi: Add support for SAW documentation
From: Amit Kucheria <hidden>
Date: 2018-05-16 13:12:59
Also in:
linux-arm-msm, linux-clk, linux-devicetree, linux-pm, lkml
On Tue, May 15, 2018 at 12:13 PM, Ilia Lin [off-list ref] wrote:
Add support for SAW controlled regulators. The regulators defined as SAW controlled in the device tree will be controlled through special CPU registers instead of direct SPMI accesses. This is required especially for CPU supply regulators to synchronize with clock scaling and for Automatic Voltage Switching. Document it.
Replace this boiler plate with what this patch actual does. Besides changing the subject, it could be, for example, "Document the DT bindings for the SAW regulators. The saw-slave property allows ganging (grouping) of several regulators so that their outputs can be combined... blah blah. The saw-leader is the only one that then is configurable in DT"
quoted hunk ↗ jump to hunk
Signed-off-by: Ilia Lin <redacted> Reviewed-by: Rob Herring <robh@kernel.org> --- .../bindings/regulator/qcom,spmi-regulator.txt | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+)diff --git a/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt b/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt index 57d2c65..406f2e5 100644 --- a/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt@@ -110,6 +110,11 @@ Qualcomm SPMI Regulators Definition: Reference to regulator supplying the input pin, as described in the data sheet. +- qcom,saw-reg: + Usage: optional + Value type: <phandle> + Description: Reference to syscon node defining the SAW registers. + The regulator node houses sub-nodes for each regulator within the device. Each sub-node is identified using the node's name, with valid values listed for each@@ -201,6 +206,17 @@ see regulator.txt - with additional custom properties described below: 2 = 0.55 uA 3 = 0.75 uA +- qcom,saw-slave: + Usage: optional + Value type: <boo> + Description: SAW controlled gang slave. Will not be configured. + +- qcom,saw-leader: + Usage: optional + Value type: <boo> + Description: SAW controlled gang leader. Will be configured as + SAW regulator. + Example: regulators {@@ -221,3 +237,32 @@ Example: .... }; + +Example 2: + + saw3: syscon at 9A10000 { + compatible = "syscon"; + reg = <0x9A10000 0x1000>; + }; + + ... + + spm-regulators { + compatible = "qcom,pm8994-regulators"; + qcom,saw-reg = <&saw3>; + s8 { + qcom,saw-slave; + }; + s9 { + qcom,saw-slave; + }; + s10 { + qcom,saw-slave; + }; + pm8994_s11_saw: s11 { + qcom,saw-leader; + regulator-always-on; + regulator-min-microvolt = <900000>; + regulator-max-microvolt = <1140000>; + }; + }; --1.9.1