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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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8a07855e66
When the binding was written all "future" platforms required three clocks, so the default compatible (qcom,scm) was defined to require this. But as history shows all "future" platforms actually lack required clocks. Given how the binding is written these compatibles have to be added as an exception to the default. Refactor the description of compatible to define that a platform compatible should be given, followed by the fallback of qcom,scm. Also refactor the description of the clocks in a way that this does not need to be updated as new platform specific compatibles are added. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
41 lines
1.3 KiB
Plaintext
41 lines
1.3 KiB
Plaintext
QCOM Secure Channel Manager (SCM)
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Qualcomm processors include an interface to communicate to the secure firmware.
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This interface allows for clients to request different types of actions. These
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can include CPU power up/down, HDCP requests, loading of firmware, and other
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assorted actions.
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Required properties:
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- compatible: must contain one of the following:
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* "qcom,scm-apq8064"
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* "qcom,scm-apq8084"
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* "qcom,scm-msm8660"
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* "qcom,scm-msm8916"
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* "qcom,scm-msm8960"
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* "qcom,scm-msm8974"
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* "qcom,scm-msm8996"
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* "qcom,scm-ipq4019"
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and:
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* "qcom,scm"
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- clocks: Specifies clocks needed by the SCM interface, if any:
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* core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660" and
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"qcom,scm-msm8960"
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* core, iface and bus clocks required for "qcom,scm-apq8084",
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"qcom,scm-msm8916" and "qcom,scm-msm8974"
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- clock-names: Must contain "core" for the core clock, "iface" for the interface
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clock and "bus" for the bus clock per the requirements of the compatible.
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- qcom,dload-mode: phandle to the TCSR hardware block and offset of the
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download mode control register (optional)
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Example for MSM8916:
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firmware {
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scm {
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compatible = "qcom,msm8916", "qcom,scm";
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clocks = <&gcc GCC_CRYPTO_CLK> ,
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<&gcc GCC_CRYPTO_AXI_CLK>,
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<&gcc GCC_CRYPTO_AHB_CLK>;
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clock-names = "core", "bus", "iface";
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};
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};
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