vdd-1v8: the voltage operation not allowed

the boot dmesg as follows:

[    6.984875] tegra-xusb 3530000.xhci: entering ELPG
[    6.988271] tegra-xusb 3530000.xhci: entering ELPG done
[   16.176309] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.257724] gpio tegra-gpio wake18 for gpio=101(M:5)
[   16.259904] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.287168] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   16.287279] 
               
               Dongle Host Driver, version 1.201.82 (r)
               Compiled from 
[   16.287287] wl_android_wifi_on in
[   16.287291] wifi_platform_set_power = 1
[   16.500782] vdd-1v8: voltage operation not allowed
[   16.506052] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.533021] vdd-1v8: voltage operation not allowed
[   16.538338] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.565843] vdd-1v8: voltage operation not allowed
[   16.571207] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.580791] vdd-1v8: voltage operation not allowed
[   16.586179] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.694728] vdd-1v8: voltage operation not allowed
[   16.700157] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.708310] vdd-1v8: voltage operation not allowed
[   16.713775] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.722587] vdd-1v8: voltage operation not allowed
[   16.728049] sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
[   16.735396] sdhci-tegra 3440000.sdhci: Tuning done, restoring the best tap value : 66
[   16.735906] F1 signature read @0x18000000=0x17214354
[   16.740156] F1 signature OK, socitype:0x1 chip:0x4354 rev:0x1 pkg:0x2
[   16.740753] DHD: dongle ram size is set to 786432(orig 786432) at 0x180000
[   16.804980] dhdsdio_write_vars: Download, Upload and compare of NVRAM succeeded.
[   16.866916] dhd_bus_init: enable 0x06, ready 0x06 (waited 0us)
[   16.867162] gpio tegra-gpio-aon wake69 for gpio=59(FF:3)
[   16.867217] gpio tegra-gpio-aon wake69 for gpio=59(FF:3)
[   16.867219] Enabling wake69
[   16.867926] wifi_platform_get_mac_addr
[   16.869810] Firmware up: op_mode=0x0005, MAC=00:04:4b:a5:cb:00
[   16.873821] clm path from default:/lib/firmware/brcm/bcmdhd.clm_blob
[   16.873850] Skipping the clm download. len:0 memblk:          (null)
[   16.875943] dhd_preinit_ioctls pspretend_threshold for HostAPD failed  -23
[   16.880543] Firmware version = wl0: May 17 2019 16:59:40 version 7.35.349.79 (r714996 CY) FWID 01-e527e2ad
[   16.882693] dhd_interworking_enable: failed to set WNM info, ret=-23
[   16.940573] l4tbr0: port 2(usb0) entered blocking state
[   16.940578] l4tbr0: port 2(usb0) entered forwarding state
[   16.940625] l4tbr0: port 1(rndis0) entered blocking state
[   16.940628] l4tbr0: port 1(rndis0) entered forwarding state
[   16.940729] IPv6: ADDRCONF(NETDEV_UP): l4tbr0: link is not ready
[   16.940746] IPv6: ADDRCONF(NETDEV_CHANGE): l4tbr0: link becomes ready
[   16.984456] CFGP2P-ERROR) wl_cfgp2p_add_p2p_disc_if : 
[   16.984460] P2P interface registered

What causes will occur this problem? Does this have any effect?

No, this error is not fatal. It comes from the sdhci device tree in which we fix the vdd-1v8 to 1v8 only which exactly could be 1.65 ~1.95v

and sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)

what should I do to solve the problems?

Those two are same and just warning message.

It comes from the sdhci device tree in which we fix the vdd-1v8 to 1v8 only which exactly could be 1.65 ~1.95v.

what should do in the device tree to solve the problem?

Hi,

This is not a problem to be solved. As I said, this is a warning message.
Are you trying to disable all messages that look like an error?

Hi WayneWWW,
Because I don’t know the messages that look like an error will have any effect,so I want to see if there is any way to eliminate them.

This line has no effect.

Our suggestion is not to modify the parameters in sdhci device tree. They are optimized by our hardware team and if you change any value, it may be not that stable and affect normal functionality.

Thank you very much!

so what do I do to the device tree to remove these message

Step in to other topic will not help your issue, please continue on updating the status, question or test result on your topic. Thanks