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楼主 # 2022-01-26 16:27:10

droptop
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注册时间: 2022-01-26
已发帖子: 17
积分: 20

No Spidev device

Hi everyone,

I recently just built flashed the r3 with a nand image, using the sources from this repo.

cat /lib/modules/5.4.99/modules.builtin | grep spi 

  confirms the presence of the spidev module. However there isn't any

/dev/spi*

file.  Looking at the contents of the file 'board/widora/mangopi/r3/devicetree/linux/devicetree.dts' I only find the device node for the first SPI controller (spi0) with child nodes spi-nor & spi-nand and none for the second SPI controller (spi1 ?). Do I need add another SPI device node to these file?? or is there something I'm missing??

Any help would be much appreciated

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楼主 #2 2022-01-27 16:00:37

droptop
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注册时间: 2022-01-26
已发帖子: 17
积分: 20

Re: No Spidev device

Thank you @Lone Star Tears, for the quick response and sorry I'm only getting back now.

This is the section where CONFIG_SPI_SPIDEV is already set.

#
# SPI Protocol Masters
#
CONFIG_SPI_SPIDEV=y
# CONFIG_SPI_LOOPBACK_TEST is not set
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_SPI_SLAVE is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
...

Do I need to set CONFIG_SPI_SLAVE??. And also what make target do I use to avoid recompiling everything.

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楼主 #4 2022-01-27 17:56:39

droptop
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注册时间: 2022-01-26
已发帖子: 17
积分: 20

Re: No Spidev device

Hi shaoxi2010,,

Checked board/allwinner/suniv-f1c100s/devicetree/linux/suniv-f1c100s.dtsi and board/widora/mangopi/r3/devicetree/linux/devicetree.dts. Got nothing

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楼主 #6 2022-01-27 19:06:03

droptop
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注册时间: 2022-01-26
已发帖子: 17
积分: 20

Re: No Spidev device

Yup I added it. Looking at the source (board/widora/mangopi/r3/devicetree/linux/devicetree.dts) there is no configuration for the second SPI controller (spi1), so I added one. Also the compatible string I use is 'linux,spidev'. I now get the device in /dev but it seems the a test program shows the SPI port isn't working. I'll keep trying..

最近编辑记录 droptop (2022-01-27 19:17:30)

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