IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

wang12zhe — Thu, 05 Jan 2023 05:28:51 GMT

HW : IMX8QXP EVK

Yocto Revision number : LF5.10.52_2.1.0

I had modified imx8x-mek.dtsi as below:

pinctrl_lcdif: lcdifgrp {

fsl,pins = <

IMX8QXP_ESAI0_FSR_ADMA_LCDIF_D00 0x00000060

IMX8QXP_ESAI0_FST_ADMA_LCDIF_D01 0x00000060

IMX8QXP_ESAI0_SCKR_ADMA_LCDIF_D02 0x00000060

IMX8QXP_ESAI0_SCKT_ADMA_LCDIF_D03 0x00000060

IMX8QXP_ESAI0_TX0_ADMA_LCDIF_D04 0x00000060

IMX8QXP_ESAI0_TX1_ADMA_LCDIF_D05 0x00000060

IMX8QXP_ESAI0_TX2_RX3_ADMA_LCDIF_D06 0x00000060

IMX8QXP_ESAI0_TX3_RX2_ADMA_LCDIF_D07 0x00000060

IMX8QXP_ESAI0_TX4_RX1_ADMA_LCDIF_D08 0x00000060

IMX8QXP_ESAI0_TX5_RX0_ADMA_LCDIF_D09 0x00000060

IMX8QXP_SPDIF0_RX_ADMA_LCDIF_D10 0x00000060

IMX8QXP_SPDIF0_TX_ADMA_LCDIF_D11 0x00000060

IMX8QXP_SPDIF0_EXT_CLK_ADMA_LCDIF_D12 0x00000060

/*IMX8QXP_SPI3_SCK_ADMA_LCDIF_D13 0x00000060

IMX8QXP_SPI3_SDO_ADMA_LCDIF_D14 0x00000060

IMX8QXP_SPI3_SDI_ADMA_LCDIF_D15 0x00000060

IMX8QXP_UART1_RTS_B_ADMA_LCDIF_D16 0x00000060

IMX8QXP_UART1_CTS_B_ADMA_LCDIF_D17 0x00000060

IMX8QXP_SPI3_CS0_ADMA_LCDIF_HSYNC 0x00000060

IMX8QXP_SPI3_CS1_ADMA_LCDIF_RESET 0x00000060

IMX8QXP_MCLK_IN1_ADMA_LCDIF_EN 0x00000060

IMX8QXP_MCLK_IN0_ADMA_LCDIF_VSYNC 0x00000060

IMX8QXP_MCLK_OUT0_ADMA_LCDIF_CLK 0x00000060

};

pinctrl_lcdifpwm: lcdifpwmgrp {

fsl,pins = <

IMX8QXP_SPI0_CS1_ADMA_LCD_PWM0_OUT 0x00000060

};

pinctrl_test: test {

fsl,pins = <

IMX8QXP_SPI3_CS0_LSIO_GPIO0_IO16 0xC0000021

IMX8QXP_SPI3_SCK_LSIO_GPIO0_IO13 0xC0000021

IMX8QXP_SPI3_SDO_LSIO_GPIO0_IO14 0xC0000021 //OK

IMX8QXP_SPI3_SDI_LSIO_GPIO0_IO15 0xC0000021

};

After download the image to imx8qxp, I test the pin as below：

root@imx8qxpmek:/sys/class/gpio# echo 13 > export
root@imx8qxpmek:/sys/class/gpio# echo 14 > export
root@imx8qxpmek:/sys/class/gpio# echo 15 > export
root@imx8qxpmek:/sys/class/gpio# echo 16 > export
root@imx8qxpmek:/sys/class/gpio# echo out > gpio13/direction
root@imx8qxpmek:/sys/class/gpio# echo out > gpio14/direction
root@imx8qxpmek:/sys/class/gpio# echo out > gpio15/direction
root@imx8qxpmek:/sys/class/gpio# echo out > gpio16/direction
root@imx8qxpmek:/sys/class/gpio# echo 1 > gpio13/value
root@imx8qxpmek:/sys/class/gpio# echo 1 > gpio14/value
root@imx8qxpmek:/sys/class/gpio# echo 1 > gpio15/value
root@imx8qxpmek:/sys/class/gpio# echo 1 > gpio16/value

But only gpio14 is high (1.8V), other three pins are low (0v)

Any error in my test case? how to use there three pins as gpio

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

Zhiming_Liu — Tue, 10 Jan 2023 01:51:29 GMT

You need add these iomux configs to pinctrl_hog

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

wang12zhe — Tue, 10 Jan 2023 04:59:21 GMT

@Zhiming_Liu

in imx8x-mek.dts,add iomux configs to pinctrl_hog,but not work,always low

&iomuxc {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_hog>;

pinctrl_hog: hoggrp {

fsl,pins = <

IMX8QXP_MCLK_OUT0_ADMA_ACM_MCLK_OUT0 0x0600004c

IMX8QXP_COMP_CTL_GPIO_1V8_3V3_GPIORHB_PAD 0x000514a0

IMX8QXP_SPI3_CS0_LSIO_GPIO0_IO16 0xC0000021

IMX8QXP_SPI3_SCK_LSIO_GPIO0_IO13 0xC0000021

IMX8QXP_SPI3_SDO_LSIO_GPIO0_IO14 0xC0000021 //0xC0000021 //OK

IMX8QXP_SPI3_SDI_LSIO_GPIO0_IO15 0xC0000021

};

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

Zhiming_Liu — Tue, 10 Jan 2023 05:02:48 GMT

Change GPIO property needs also change SCFW firmware:

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/System-Controller-Firmware-101-Pad-configuration-service/ta-p/1124213

i.MX ProcessorsのトピックRe: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work

Re: IMX8QXP GPIO0_IO13/GPIO0_IO15/GPIO0_IO16 not work