Issue about GPIO LVE Setting

tony_l_cai — Mon, 02 Mar 2015 03:48:28 GMT

Hi all，

I have issues about GPIO Low Voltage Enable Field setting on i.mx6sl. First, in Iomux-v3.h of kernel, I see the following define:

* Use to set PAD control

#define PAD_CTL_LVE_OFFSET (22)

#define PAD_CTL_LVE (1 << 18)

and I also see the i.mx6sl manual reference(p 1397) as the following picture "1.bmp". the LVE bit is 22 not 18. so is it wrong?

and whatever 18 or 22, I have tried it in kernel , it could not make the GPIO output the low voltage,and always 3.3v. why?

So please give me some sample code about setting the LVE bit in kernel.

3Q!

Re: Issue about GPIO LVE Setting

igorpadykov — Mon, 02 Mar 2015 06:24:19 GMT

Hi tony

Reference Manual gives correct description.

Linux sources have codes for different processors which may

have this bit in another position.

Best regards

igor

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