i.MX ProcessorsのトピックRe: GPIO config register

GPIO config register

xu_ji1 — Wed, 29 May 2019 03:01:40 GMT

Hello，

Could u help detail explain about GPIO config below：

update_mux_mode
update lock for mux control
write 1 to allow programming to mux control [29:19]

update_pad_ctl
update lock for pad control
write 1 to allow programming to pad control [14-1:0]

Just for little words I can not understand it more,when set the register 1 and when set 0?

pls help it

Thanks

Re: GPIO config register

igorpadykov — Wed, 29 May 2019 05:04:24 GMT

Hi Xu

one can check sect.2.1.5.6 IOMUX Control Through GPIO Module attached Linux Manual and

sect.Chapter 8 Configuring IOMUX Porting Guide from nxp software documentation link below

https://www.nxp.com/support/developer-resources/run-time-software/i.mx-developer-resources/i.mx-6series-i.mx-7series-software-and-development-tool-resources:IMX_SW

For i.MX8 series use SCFW documentation in SCFW Porting Kit

Best regards
igor
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Re: GPIO config register

flobro — Fri, 02 May 2025 16:09:03 GMT

I am using the iMX8 Quad Max, and I have seen examples of gpio settings where those bits are not used, but the bits they alledgedly control are modified. The information supplied is not a solution, the documentation does not appear to say if/when it needs to be used.

Could someone please explain if/when the update_mux_mode and udate_pad_ctrl need to be used?