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dt-bindings: arm: cpus: Document qcom,msm8916-smp enable-method

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Since MSM8916 is an ARM v8 64-bit SoC the CPU cores are normally booted
using "psci" or "spin-table". Unfortunately, some devices come with signed
32-bit-only firmware without ARM64 and PSCI support. This setup is easy to
support since it's very similar to older 32-bit only Qualcomm SoCs
(e.g. MSM8226) and only requires adding a few new definitions to already
existing drivers.

Document the qcom,msm8916-smp enable-method. It is actually just an alias
of qcom,msm8226-smp since it should be implemented identically.
The enable-method is only valid on ARM32 and must not be used on ARM64.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211004204955.21077-8-stephan@gerhold.net
This commit is contained in:
Stephan Gerhold 2021-10-04 22:49:48 +02:00 committed by Bjorn Andersson
parent 87922aec8a
commit 8e24a29620
1 changed files with 4 additions and 1 deletions
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5
Documentation/devicetree/bindings/arm/cpus.yaml
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@ -210,6 +210,8 @@ properties:
- qcom,kpss-acc-v1
- qcom,kpss-acc-v2
- qcom,msm8226-smp
# Only valid on ARM 32-bit, see above for ARM v8 64-bit
- qcom,msm8916-smp
- renesas,apmu
- renesas,r9a06g032-smp
- rockchip,rk3036-smp
@ -294,7 +296,8 @@ properties:
Specifies the ACC* node associated with this CPU.
Required for systems that have an "enable-method" property
value of "qcom,kpss-acc-v1", "qcom,kpss-acc-v2" or "qcom,msm8226-smp"
value of "qcom,kpss-acc-v1", "qcom,kpss-acc-v2", "qcom,msm8226-smp" or
"qcom,msm8916-smp".
* arm/msm/qcom,kpss-acc.txt