On 2/26/22 02:51, Tim Harvey wrote:
Greetings,
I've got an octeontx board which uses driver model
(CONFIG_DM/CONFIG_DM_I2C) but I find that the 'i2c_octeon' driver does
not probe automatically on boot until I do something like an 'i2c dev
0 && i2c probe'.
What would cause the i2c_octeon driver to not automatically probe?
It is the general design of U-Boot's driver model to use late probing.
This reduces the boot time.
Cf.
https://u-boot.readthedocs.io/en/latest/develop/driver-model/design.html#driver-lifecycle
Best regards
Heinrich
Here is a dm tree of the board:
Marvell> dm tree
Class Index Probed Driver Name
-----------------------------------------------------------
root 0 [ + ] root_driver root_driver
rsa_mod_ex 0 [ ] mod_exp_sw |-- mod_exp_sw
firmware 0 [ ] psci |-- psci
regulator 0 [ + ] regulator_fixed |-- mmc_supply_3v3
simple_bus 0 [ + ] simple_bus `-- soc@0
clk 0 [ + ] fixed_clock |-- refclkuaa
clk 1 [ + ] fixed_clock |-- sclk
clk 2 [ ] fixed_clock |-- can20m
serial 0 [ + ] serial_pl01x |-- serial@87e028000000
serial 1 [ ] serial_pl01x |-- serial@87e029000000
serial 2 [ ] serial_pl01x |-- serial@87e02a000000
serial 3 [ ] serial_pl01x |-- serial@87e02b000000
watchdog 0 [ + ] sbsa_gwdt |-- watch-dog@8440000a0000
pci 0 [ + ] pci_octeontx `-- pci@848000000000
pci 1 [ + ] pci_bridge_drv |-- mrml-bridge0@1,0
misc 0 [ + ] octeontx_smi | |-- mdio-nexus@1,3
misc 1 [ + ] octeontx_hsmmc_host | |-- mmc@1,4
mmc 0 [ + ] octeontx_hsmmc_slot | | `--
octeontx-mmc0
blk 0 [ + ] mmc_blk | |
`-- octeontx-mmc0.blk
i2c 0 [ ] i2c_octeon | |-- i2c@9,0
misc 2 [ ] gsc | | `-- gsc@20
i2c 1 [ ] i2c_octeon | |-- i2c@9,1
pci_generi 5 [ ] pci_generic_drv | |-- pci_1:0.0
pci_generi 6 [ ] pci_generic_drv | |-- pci_1:0.1
pci_generi 7 [ ] pci_generic_drv | |-- pci_1:1.7
pci_generi 8 [ ] pci_generic_drv | |-- pci_1:2.0
pci_generi 9 [ ] pci_generic_drv | |-- pci_1:6.0
pci_generi 10 [ ] pci_generic_drv | |-- pci_1:7.0
pci_generi 11 [ ] pci_generic_drv | |-- pci_1:7.4
pci_generi 12 [ ] pci_generic_drv | |-- pci_1:a.0
pci_generi 13 [ ] pci_generic_drv | |-- pci_1:c.0
pci_generi 14 [ ] pci_generic_drv | |-- pci_1:c.1
pci_generi 15 [ ] pci_generic_drv | |-- pci_1:d.0
misc 3 [ + ] octeontx_bgx | |-- octeontx_bgx
misc 4 [ + ] octeontx_bgx | `-- octeontx_bgx
gpio 0 [ + ] octeon_gpio |-- gpio0@6,0
pci_generi 0 [ ] pci_generic_drv |-- pci_0:7.0
pci_generi 1 [ ] pci_generic_drv |-- pci_0:8.0
pci 2 [ + ] pci_bridge_drv |-- pci_0:9.0
pci_generi 16 [ ] pci_generic_drv | `-- pci_2:0.0
pci 3 [ + ] pci_bridge_drv |-- pci_0:a.0
pci_generi 17 [ ] pci_generic_drv | `-- pci_3:0.0
pci_generi 2 [ ] pci_generic_drv |-- pci_0:b.0
pci 4 [ + ] pci_bridge_drv |-- pci_0:c.0
pci_generi 18 [ ] pci_generic_drv | `-- pci_4:0.0
pci_generi 3 [ ] pci_generic_drv |-- pci_0:d.0
pci_generi 4 [ ] pci_generic_drv |-- pci_0:e.0
pci 5 [ + ] pci_bridge_drv |-- pci_0:f.0
misc 5 [ + ] octeontx_nic | |-- octeontx_nic
ethernet 0 [ + ] vnic | |-- vnic0
ethernet 1 [ + ] vnic | `-- vnic1
usb 0 [ ] xhci_pci |-- xhci_pci
usb 1 [ ] xhci_pci `-- xhci_pci
Best regards,
Tim
