topic (IMX6Q) How to enable spidev for SPI2 in i.MX Processors

(IMX6Q) How to enable spidev for SPI2

ktc7270 — Mon, 27 Aug 2018 04:17:20 GMT

Hi,

I have a few questions about SPI.

I am developing using the imx6q-sabresd board.

Here is my code :

1. fsl-community-bsp/build/tmp/work/imx6qsabresd-poky-linux-gnueabi/linux-imx/3.0.35-r37.14/git/arch/arm/mach-mx6/board-mx6q_sabresd.h

/* ECSPI1 */ is the existing code and I added /*ECSPI2*/.

2. fsl-community-bsp/build/tmp/work/imx6qsabresd-poky-linux-gnueabi/linux-imx/3.0.35-r37.14/git/arch/arm/mach-mx6/board-mx6q_sabresd.c

3. add CONFIG_SPI_SPIDEV=y

I made this setting, but I can not see the / dev / spi related device.

I need help. please.

Best regards

CHEON

Re: (IMX6Q) How to enable spidev for SPI2

igorpadykov — Mon, 27 Aug 2018 09:29:42 GMT

Hi kangta

one can look at L3.0.35 spidev example:

/dev/spidev not appearing on iMX6Q despite kernel configuration and modalias="spidev"

Best regards
igor
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Re: (IMX6Q) How to enable spidev for SPI2

ktc7270 — Tue, 28 Aug 2018 02:16:53 GMT

Thank you for your reply. I set it up as you told me, but I do not see / dev / spi info.
Excuse me, can you suggest another way?

Re: (IMX6Q) How to enable spidev for SPI2

igorpadykov — Tue, 28 Aug 2018 08:24:28 GMT

could you try linux from

linux-2.6-imx.git - Freescale i.MX Linux Tree

Best regards
igor

Re: (IMX6Q) How to enable spidev for SPI2

ktc7270 — Wed, 29 Aug 2018 00:33:55 GMT

Thank you for your help. Now I can see /dev/spi2.0.
By the way, I am looking for a way to check spi behavior.

echo "test"> /dev/spi2.0
I tested it with the command, but it has no response.

./mxc_spi_test1.out -D 0 -s 1000000 -b 8 E6E0
In the test using / unit_test / mxc_spi_test1.out
Error: Can not open device (Maybe not present in your board?)
This error message is output.

I searched the community, but I could not find the cause. Could you help me?

Thank you.