topic How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP in i.MX Processors

How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

hsu_frank — Thu, 09 Jul 2020 00:03:09 GMT

Hi,

We are using android_p9.0.0_2.1.0-auto-ga BSP for iMX8QM Custom Board, in which its unable to configure high/low for GPIO pins in U-boot. But we change to use android_p9.0.0_2.0.0-ga and L4.14.98_2.0.0, we can success to set high/low for same PINs in U-boot.

Example:

We try to set SC_P_SPI3_CS1_LSIO_GPIO2_IO21 to high and work good in android_p9.0.0_2.0.0-ga and L4.14.98_2.0.0.

But failed in android_p9.0.0_2.1.0-auto-ga.

How to solve this problem?

Thanks.

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

jamesbone — Fri, 10 Jul 2020 15:05:02 GMT

Can you please provide your code about the "set SC_P_SPI3_CS1_LSIO_GPIO2_IO21 to high".

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

hsu_frank — Mon, 13 Jul 2020 00:48:57 GMT

We follow android_build/vendor/nxp-opensource/uboot-imx/board/freescale/imx8qm_mek/imx8qm_mek.c using API "gpio_request" and "gpio_direction_output" to set GPIO pin to high/low. For example:

gpio_request(IMX_GPIO_NR(2, 21), "power_enable");

gpio_direction_output(IMX_GPIO_NR(2, 21), 1);

These API can work in android_p9.0.0_2.0.0-ga and L4.14.98_2.0.0 but failed in android_p9.0.0_2.1.0-auto-ga.

Thanks.

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

jamesbone — Wed, 15 Jul 2020 15:26:08 GMT

I found no diff between the two branch in uboot. Could you provide the error log when set the gpio.

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

hsu_frank — Mon, 20 Jul 2020 09:17:23 GMT

U-boot will not show any error message about gpio setting.

But if we try to set gpio pins in u-boot console, we will get these message.

"lsio_gpio1 [200] not owned by curr partition"
"Error: lsio_gpio1 Power up failed! (error = 4)"

Thanks.

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

jamesbone — Fri, 31 Jul 2020 21:55:36 GMT

which platform you chose when lunch? Did car and car2 all have the issue?

in addition, please check the &gpio2 node in the dts.

Re: How could configure GPIO PINs in U-boot using android_p9.0.0_2.1.0-auto-ga BSP

compmas2 — Mon, 02 Nov 2020 16:05:58 GMT

I am having the same issue with GPIO not working but in the Linux BSP u-boot rel_imx_5.4.24_2.1.0 on an i.MX6UL. I used the same functions listed here and they used to work in an older version of u-boot too.

I submitted the following question/issue about it:
https://community.nxp.com/t5/i-MX-Processors/GPIO-silently-fails-in-u-boot-rel-imx-5-4-24-2-1-0/m-p/1176746#M164393