i.MX Processors中的主题 Re: i.MX6 - GPIO Bit Lane Issue

i.MX6 - GPIO Bit Lane Issue

PaulDeMetrotion — Wed, 25 May 2016 22:03:34 GMT

I have four GPIO bits that I have defined as inputs and all have external pull-ups so I would expect to read a one on all bits.

Here is my device tree configuration:

MX6QDL_PAD_GPIO_3__GPIO1_IO03 0x80000000 // gpio0

MX6QDL_PAD_GPIO_4__GPIO1_IO04 0x80000000 // gpio1

MX6QDL_PAD_GPIO_5__GPIO1_IO05 0x80000000 // gpio2

MX6QDL_PAD_GPIO_6__GPIO1_IO06 0x80000000 // gpio3

When I actaully read the values, the bits are set but they are still in their register bit alignment as shown.

root@imx6soloc421:/sys/class/gpio# echo in > gpio3/direction

root@imx6soloc421:/sys/class/gpio# echo in > gpio4/direction

root@imx6soloc421:/sys/class/gpio# echo in > gpio5/direction

root@imx6soloc421:/sys/class/gpio# echo in > gpio6/direction

root@imx6soloc421:/sys/class/gpio# cat gpio3/value

root@imx6soloc421:/sys/class/gpio# cat gpio4/value

root@imx6soloc421:/sys/class/gpio# cat gpio5/value

root@imx6soloc421:/sys/class/gpio# cat gpio6/value

Anybody know why this is happening?

Re: i.MX6 - GPIO Bit Lane Issue

Carlos_Musich — Wed, 01 Jun 2016 17:42:21 GMT

Hi Paul,

It seems to me that you are mixing 2 different BSPs. I find strange that on one side you have in your device tree configuration 'MX6QDL'. However on the other side you have root@imxsoloc, so I wonder what BSP are you using? Is it a BSP provided by NXP?

Regards,

Carlos

Re: i.MX6 - GPIO Bit Lane Issue

PaulDeMetrotion — Wed, 01 Jun 2016 18:29:02 GMT

The device uses an i.MX6 Solo device which uses the i.MX6 DL iomux settings.

Re: i.MX6 - GPIO Bit Lane Issue

Carlos_Musich — Thu, 02 Jun 2016 22:24:04 GMT

Is it your own BSP?