smbus-pch

QNX Board Support Packages8.0BSP User's GuideAMD Sapphire Ryzen EdgeAMDAMDx86

SMBus resource manager on the AMD Ryzen V2000 Sapphire IPC-FP6 Board.

Syntax:

                    smbus-pch [-D pci_did]
                            [-I pci_instance]
                            [-i irq]
                            [-o device_options]
                            [-P base_address^size[^type]]
                            [-p]
                            [-U uid[:gid[,sup_gid]*]]
                            [-u unit]
                            [-V pci_vid]
                            [-v verbose]

Runs on:

QNX OS

Options:

These are the options available for this driver.

-D pci_did: Specify the PCI device ID. If not specified, the driver searches all the device IDs.
-I pci_instance: In the event that more than one SMBus controller was found, the PCI instance allows to select the correct PCI device among the ones found. The instance starts at 0 for the first device, 1 for the second device, and so on. (default: 0)
-i irq: Specify the IRQ. If the SMBus controller is a PCI device, this option forces the driver to use the specified IRQ instead of the IRQ discovered in the PCI device.
-o device_options: Specify the device-specific comma separated options.
-P base_address^size[^type]: Specify the base address register. If the SMBus controller is a PCI device, this option forces the driver to use the specified base address instead of the BAR discovered in the PCI device. This option requires the base address register and the register bank size. The address type can be 1 for a MMIO base address, or 2 for a I/O base address. If the address type is not specified, the default type is MMIO.
-p: Enable polling mode. If a IRQ was specified or discovered in the PCI device, the driver uses an interrupt-based transaction handler. If no IRQ was discovered or specified, the driver uses a polling-based transaction handler. Setting this option forces the driver to use the polling-based transaction handler regardless of the configuration of the IRQ. (default: disable)
-U uid[:gid[,sup_gid]*] -U user_name[,sup_gid]*: Run as the given user (or uid) with the given group ids. Note that if the user is specified by name, the given groups are added to that user's group list. If the user is specified by uid and no groups are listed, the process inherits the parent process' group list. (default: run as the user starting the driver)
-uunit: Specify the device unit appended to the device name prefix (/dev/smb). Default: 0
-V pci_vid: Specify the PCI vendor ID. If not specified, the driver searches all the vendor IDs.
-v-verbose=level: Set the verbosity level of slogger2 messages. Adding extra 'v' cumulatively increases the verbosity level of slogger2 up to SLOG2_DEBUG2 (i.e.: 7). Specifying a negative level redirects the messages to 'stderr' instead of slogger2. This is also the case if slogger2 is not found during the driver initialization. (default: SLOG2_ERROR)

Examples:

Start the driver on the first SMBus controller in polling mode at /dev/smb1:

smbus-pch -u 1 -p

Start the driver on the SMBus controller at the I/O address 0x1F00 in interrupt mode

smbus-pch -P 0x1F00^0x100^2 -i 0x18

Page updated: December 09, 2025