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148 lines
5.2 KiB
148 lines
5.2 KiB
What: /sys/bus/i3c/devices/i3c-<bus-id> |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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An I3C bus. This directory will contain one sub-directory per |
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I3C device present on the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/current_master |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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Expose the master that owns the bus (<bus-id>-<master-pid>) at |
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the time this file is read. Note that bus ownership can change |
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overtime, so there's no guarantee that when the read() call |
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returns, the value returned is still valid. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/mode |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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I3C bus mode. Can be "pure", "mixed-fast" or "mixed-slow". See |
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the I3C specification for a detailed description of what each |
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of these modes implies. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/i3c_scl_frequency |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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The frequency (expressed in Hz) of the SCL signal when |
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operating in I3C SDR mode. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/i2c_scl_frequency |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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The frequency (expressed in Hz) of the SCL signal when |
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operating in I2C mode. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/dynamic_address |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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Dynamic address assigned to the master controller. This |
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address may change if the bus is re-initialized. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/bcr |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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BCR stands for Bus Characteristics Register and express the |
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device capabilities in term of speed, maximum read/write |
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length, etc. See the I3C specification for more details. |
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This entry describes the BCR of the master controller driving |
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the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/dcr |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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DCR stands for Device Characteristics Register and express the |
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device capabilities in term of exposed features. See the I3C |
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specification for more details. |
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This entry describes the DCR of the master controller driving |
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the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/pid |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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PID stands for Provisional ID and is used to uniquely identify |
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a device on a bus. This PID contains information about the |
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vendor, the part and an instance ID so that several devices of |
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the same type can be connected on the same bus. |
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See the I3C specification for more details. |
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This entry describes the PID of the master controller driving |
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the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/hdrcap |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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Expose the HDR (High Data Rate) capabilities of a device. |
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Returns a list of supported HDR mode, each element is separated |
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by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl". |
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See the I3C specification for more details about these HDR |
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modes. |
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This entry describes the HDRCAP of the master controller |
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driving the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid> |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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An I3C device present on I3C bus identified by <bus-id>. Note |
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that all devices are represented including the master driving |
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the bus. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/dynamic_address |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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Dynamic address assigned to device <bus-id>-<device-pid>. This |
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address may change if the bus is re-initialized. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/bcr |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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BCR stands for Bus Characteristics Register and express the |
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device capabilities in term of speed, maximum read/write |
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length, etc. See the I3C specification for more details. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/dcr |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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DCR stands for Device Characteristics Register and express the |
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device capabilities in term of exposed features. See the I3C |
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specification for more details. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/pid |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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PID stands for Provisional ID and is used to uniquely identify |
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a device on a bus. This PID contains information about the |
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vendor, the part and an instance ID so that several devices of |
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the same type can be connected on the same bus. |
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See the I3C specification for more details. |
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What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/hdrcap |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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Expose the HDR (High Data Rate) capabilities of a device. |
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Returns a list of supported HDR mode, each element is separated |
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by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl". |
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See the I3C specification for more details about these HDR |
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modes. |
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What: /sys/bus/i3c/devices/<bus-id>-<device-pid> |
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KernelVersion: 5.0 |
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Contact: [email protected] |
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Description: |
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These directories are just symbolic links to |
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/sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>.
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