How to set MOSI pin default low

weikeng-jimmy — Fri, 15 Mar 2019 08:09:30 GMT

Hi Sir,

My customer need I.MX8QX SPI0_MOSI default low for communicate to SPI device.

I try to modify pad/mux control register from kernel dts file as below . But the MOSI pin default always is high. (Besides open-drain) .

How can I set MOSI pin default low ? Thanks~

26-25(SW CONFIG) 6-5(pull) MOSI status

00b-DEFAULT 10b-pull down High

01b-OPEN-DRAIN 10b-pull down Always Low

10b-OPEN-DRAIN-INPUT 10b-pull down High

11b-INOUT 10b-pull down High

Re: How to set MOSI pin default low

igorpadykov — Fri, 15 Mar 2019 09:30:32 GMT

Hi Jimmy

using dts settings it is not possible to set default pin value.

In general if spi module settings allows for such default configuration, it

can be done in uboot.

Best regards
igor
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How to set MOSI pin default low

Re: How to set MOSI pin default low