mirror of
https://github.com/oplus-giulia-dev/android_kernel_oneplus_sm8650-devicetrees
synced 2025-11-04 06:44:04 +08:00
66 lines
2.5 KiB
Plaintext
66 lines
2.5 KiB
Plaintext
MSM MHI DEV
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MSM MHI DEV enables communication with the host over a PCIe link using the
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Modem Host Interface protocol. The driver interfaces with the IPA for
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enabling the HW acceleration channel path and provides interface for
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software channels to communicate between Host and device.
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Required properties:
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- compatible: should be "qcom,msm-mhi-dev" for MHI device driver.
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- reg: MHI MMIO physical register space.
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- reg-names: resource names used for the MHI MMIO physical address region,
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IPA uC command and event ring doorbell mail box address.
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Should be "mhi_mmio_base" for MHI MMIO physical address,
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"ipa_uc_mbox_crdb" for IPA uC Command Ring doorbell,
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"ipa_uc_mbox_erdb" for IPA uC Event Ring doorbell passed to
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the IPA driver.
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- qcom,mhi-ifc-id: ID of HW interface via which MHI on device side
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communicates with host side.
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- qcom,mhi-ep-msi: End point MSI number.
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- qcom,mhi-version: MHI specification version supported by the device.
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Optional property:
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- qcom,use-ipa-software-channel: If property is present use IPA hardware
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accelerated path for MHI software channel data transfers
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between host and device.
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- qcom,mhi-config-iatu: If property is present map the control and data region
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between host and device using iatu.
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- qcom,mhi-interrupt: If property is present register for mhi interrupt.
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- qcom,mhi-local-pa-base: The physical base address on the device used by the
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MHI device driver to map the control and data region with the
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MHI driver on the host. This property is required if iatu
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property qcom,mhi-config-iatu is present.
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- qcom,enable-m2: If property is present M2 autonomous is enabled.
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MSM MHI DEV NET
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MSM MHI DEV enables communication with the host over a PCIe link using the
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Network Interface.
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Required properties:
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- compatible: should be "qcom,msm-mhi-dev-net" for MHI net device driver.
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Optional property:
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- qcom,mhi-ethernet-interface;: If property is present use ethernet packet
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parsing support.
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- qcom,tx_rx_reqs;: If property present it will override the number of elements
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in rx and tx queues for mhi_dev_net device.(Default:128)
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Example:
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mhi: qcom,msm-mhi-dev {
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compatible = "qcom,msm-mhi-dev";
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reg = <0xfc527000 0x1000>,
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<0xfd4fa000 0x1>,
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<0xfd4fa080 0x1>;
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reg-names = "mhi_mmio_base", "ipa_uc_mbox_crdb",
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"ipa_uc_mbox_erdb";
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qcom,mhi-ifc-id = <0x030017cb>;
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qcom,mhi-ep-msi = <1>;
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qcom,mhi-version = <0x1000000>;
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};
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qcom,mhi_net_dev {
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compatible = "qcom,msm-mhi-dev-net";
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qcom,mhi-ethernet-interface;
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};
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