| What: /sys/bus/i3c/devices/i3c-<bus-id> |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| An I3C bus. This directory will contain one sub-directory per |
| I3C device present on the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/current_master |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| Expose the master that owns the bus (<bus-id>-<master-pid>) at |
| the time this file is read. Note that bus ownership can change |
| overtime, so there's no guarantee that when the read() call |
| returns, the value returned is still valid. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/mode |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| I3C bus mode. Can be "pure", "mixed-fast" or "mixed-slow". See |
| the I3C specification for a detailed description of what each |
| of these modes implies. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/i3c_scl_frequency |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| The frequency (expressed in Hz) of the SCL signal when |
| operating in I3C SDR mode. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/i2c_scl_frequency |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| The frequency (expressed in Hz) of the SCL signal when |
| operating in I2C mode. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/dynamic_address |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| Dynamic address assigned to the master controller. This |
| address may change if the bus is re-initialized. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/bcr |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| BCR stands for Bus Characteristics Register and express the |
| device capabilities in term of speed, maximum read/write |
| length, etc. See the I3C specification for more details. |
| This entry describes the BCR of the master controller driving |
| the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/dcr |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| DCR stands for Device Characteristics Register and express the |
| device capabilities in term of exposed features. See the I3C |
| specification for more details. |
| This entry describes the DCR of the master controller driving |
| the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/pid |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| PID stands for Provisioned ID and is used to uniquely identify |
| a device on a bus. This PID contains information about the |
| vendor, the part and an instance ID so that several devices of |
| the same type can be connected on the same bus. |
| See the I3C specification for more details. |
| This entry describes the PID of the master controller driving |
| the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/hdrcap |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| Expose the HDR (High Data Rate) capabilities of a device. |
| Returns a list of supported HDR mode, each element is separated |
| by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl". |
| See the I3C specification for more details about these HDR |
| modes. |
| |
| This entry describes the HDRCAP of the master controller |
| driving the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/hotjoin |
| KernelVersion: 6.8 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| I3C’s Hot-Join mechanism allows an I3C Device to inform the |
| Active Controller that a newly-joined Target is present on the |
| I3C Bus and is ready to receive a Dynamic Address, in order to |
| become fully functional on the Bus. Hot-Join is used when the |
| Target is mounted on the same I3C bus and remains depowered |
| until needed or until the Target is physically inserted into the |
| I3C bus |
| |
| This entry allows to enable or disable Hot-join of the Current |
| Controller driving the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid> |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| An I3C device present on I3C bus identified by <bus-id>. Note |
| that all devices are represented including the master driving |
| the bus. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/dynamic_address |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| Dynamic address assigned to device <bus-id>-<device-pid>. This |
| address may change if the bus is re-initialized. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/bcr |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| BCR stands for Bus Characteristics Register and express the |
| device capabilities in term of speed, maximum read/write |
| length, etc. See the I3C specification for more details. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/dcr |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| DCR stands for Device Characteristics Register and express the |
| device capabilities in term of exposed features. See the I3C |
| specification for more details. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/pid |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| PID stands for Provisioned ID and is used to uniquely identify |
| a device on a bus. This PID contains information about the |
| vendor, the part and an instance ID so that several devices of |
| the same type can be connected on the same bus. |
| See the I3C specification for more details. |
| |
| What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/hdrcap |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| Expose the HDR (High Data Rate) capabilities of a device. |
| Returns a list of supported HDR mode, each element is separated |
| by space. Modes can be "hdr-ddr", "hdr-tsp" and "hdr-tsl". |
| |
| See the I3C specification for more details about these HDR |
| modes. |
| |
| What: /sys/bus/i3c/devices/<bus-id>-<device-pid> |
| KernelVersion: 5.0 |
| Contact: linux-i3c@vger.kernel.org |
| Description: |
| These directories are just symbolic links to |
| /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>. |
