topic Re: How to set GPIO initial setting for i.MX8M Mini. in i.MX Processors

topic Re: How to set GPIO initial setting for i.MX8M Mini. in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1300228#M176234 <P>Hi TANAKA</P> <P> </P> <P>>Could you please let us know how to set these direction in kernel?<BR />>We need to change device tree? Could you please show example?</P> <P> </P> <P>not possible to set direction and set the value of GPIO in device tree, one can</P> <P>set them in uboot, example:</P> <P><A href="https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/imx8mm_evk/spl.c?h=imx_v2020.04_5.4.70_2.3.0" target="_blank">https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/imx8mm_evk/spl.c?h=imx_v2020.04_5.4.70_2.3.0</A></P> <P><A href="https://source.codeaurora.org/external/imx/uboot-imx/tree/include/asm-generic/gpio.h?h=imx_v2020.04_5.4.70_2.3.0" target="_blank">https://source.codeaurora.org/external/imx/uboot-imx/tree/include/asm-generic/gpio.h?h=imx_v2020.04_5.4.70_2.3.0</A></P> <P><BR />>Also, we need to get and set the value of GPIO in user space.</P> <P> </P> <P>one can look at example</P> <P><A href="https://variwiki.com/index.php?title=MX8M_GPIO&release=RELEASE_HARDKNOTT_V1.0_DART-MX8M-MINI" target="_blank">https://variwiki.com/index.php?title=MX8M_GPIO&release=RELEASE_HARDKNOTT_V1.0_DART-MX8M-MINI</A></P> <P> </P> <P>Best regards<BR />igor</P> Wed, 30 Jun 2021 07:43:20 GMT igorpadykov 2021-06-30T07:43:20Z How to set GPIO initial setting for i.MX8M Mini. https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1300104#M176217 <P>Hi,</P><P>We use custom board using i.MX8M Mini.<BR />And we try to change OS based on Linux for i.MX (Linux 5.4.70_2.3.0).<BR />We have some additional GPIO for output and input.<BR />Could you please let us know how to set these direction in kernel?<BR />We need to change device tree? Could you please show example?<BR />Also, we need to get and set the value of GPIO in user space.</P><P>Any help would be appreciated.</P><P>Thank you.</P><P>Best regards,</P> Wed, 30 Jun 2021 05:21:46 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1300104#M176217 tan-k 2021-06-30T05:21:46Z Re: How to set GPIO initial setting for i.MX8M Mini. https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1300228#M176234 <P>Hi TANAKA</P> <P> </P> <P>>Could you please let us know how to set these direction in kernel?<BR />>We need to change device tree? Could you please show example?</P> <P> </P> <P>not possible to set direction and set the value of GPIO in device tree, one can</P> <P>set them in uboot, example:</P> <P><A href="https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/imx8mm_evk/spl.c?h=imx_v2020.04_5.4.70_2.3.0" target="_blank">https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/imx8mm_evk/spl.c?h=imx_v2020.04_5.4.70_2.3.0</A></P> <P><A href="https://source.codeaurora.org/external/imx/uboot-imx/tree/include/asm-generic/gpio.h?h=imx_v2020.04_5.4.70_2.3.0" target="_blank">https://source.codeaurora.org/external/imx/uboot-imx/tree/include/asm-generic/gpio.h?h=imx_v2020.04_5.4.70_2.3.0</A></P> <P><BR />>Also, we need to get and set the value of GPIO in user space.</P> <P> </P> <P>one can look at example</P> <P><A href="https://variwiki.com/index.php?title=MX8M_GPIO&release=RELEASE_HARDKNOTT_V1.0_DART-MX8M-MINI" target="_blank">https://variwiki.com/index.php?title=MX8M_GPIO&release=RELEASE_HARDKNOTT_V1.0_DART-MX8M-MINI</A></P> <P> </P> <P>Best regards<BR />igor</P> Wed, 30 Jun 2021 07:43:20 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1300228#M176234 igorpadykov 2021-06-30T07:43:20Z Re: How to set GPIO initial setting for i.MX8M Mini. https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1301004#M176293 <P>Hi,</P><P>Thank you for your reply.<BR />We referred to your URL and could set GPIO in uboot.<BR />Also, we could set and get the value GPIO via /sys/class/gpio.</P><P>Best regards,</P> Thu, 01 Jul 2021 08:10:05 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-set-GPIO-initial-setting-for-i-MX8M-Mini/m-p/1301004#M176293 tan-k 2021-07-01T08:10:05Z