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dt-bindings: arm: Document qcom,kpss-gcc

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The ACC and GCC regions present in KPSSv1 contain registers to
control clocks and power to each Krait CPU and L2. Documenting
the bindings here.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Tested-by: Craig Tatlor <ctatlor97@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Stephen Boyd 2018-08-14 17:42:28 +05:30 committed by Stephen Boyd
parent 3ddc3564d3
commit 40e5ddf4f8
2 changed files with 63 additions and 0 deletions
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19
Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
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@ -21,10 +21,29 @@ PROPERTIES
the register region. An optional second element specifies
the base address and size of the alias register region.
- clocks:
Usage: required
Value type: <prop-encoded-array>
Definition: reference to the pll parents.
- clock-names:
Usage: required
Value type: <stringlist>
Definition: must be "pll8_vote", "pxo".
- clock-output-names:
Usage: optional
Value type: <string>
Definition: Name of the output clock. Typically acpuX_aux where X is a
CPU number starting at 0.
Example:
clock-controller@2088000 {
compatible = "qcom,kpss-acc-v2";
reg = <0x02088000 0x1000>,
<0x02008000 0x1000>;
clocks = <&gcc PLL8_VOTE>, <&gcc PXO_SRC>;
clock-names = "pll8_vote", "pxo";
clock-output-names = "acpu0_aux";
};

44
Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt Normal file
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@ -0,0 +1,44 @@
Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
PROPERTIES
- compatible:
Usage: required
Value type: <string>
Definition: should be one of the following. The generic compatible
"qcom,kpss-gcc" should also be included.
"qcom,kpss-gcc-ipq8064", "qcom,kpss-gcc"
"qcom,kpss-gcc-apq8064", "qcom,kpss-gcc"
"qcom,kpss-gcc-msm8974", "qcom,kpss-gcc"
"qcom,kpss-gcc-msm8960", "qcom,kpss-gcc"
- reg:
Usage: required
Value type: <prop-encoded-array>
Definition: base address and size of the register region
- clocks:
Usage: required
Value type: <prop-encoded-array>
Definition: reference to the pll parents.
- clock-names:
Usage: required
Value type: <stringlist>
Definition: must be "pll8_vote", "pxo".
- clock-output-names:
Usage: required
Value type: <string>
Definition: Name of the output clock. Typically acpu_l2_aux indicating
an L2 cache auxiliary clock.
Example:
l2cc: clock-controller@2011000 {
compatible = "qcom,kpss-gcc-ipq8064", "qcom,kpss-gcc";
reg = <0x2011000 0x1000>;
clocks = <&gcc PLL8_VOTE>, <&gcc PXO_SRC>;
clock-names = "pll8_vote", "pxo";
clock-output-names = "acpu_l2_aux";
};