AM625: dts for multiple SPI CS

Tony Tang

Mastermind 29252 points

Part Number: AM625

Tool/software:

How to configure dts to support multiple cs on one SPI?

Configured as below, report error, is there somewhere defined max device number?

over 1 year ago

0 Andreas Dannenberg over 1 year ago

TI__Guru 69817 points

Hi Tony,

your nodes have the same name (`spidev`), I don't think this will work and probably is the reason for your issues. Try naming them `spidev0` and `spidev1` for the first and second device.

Regards, Andreas

0 Tony Tang over 1 year ago in reply to Andreas Dannenberg

TI__Mastermind 29252 points

Hi Andreas,

Seem the spi-num-cs default to 1 for AM62x. need to add it to dts when more than 1 device on one SPI instance.

0 Andreas Dannenberg over 1 year ago in reply to Tony Tang

TI__Guru 69817 points

Thanks for sharing this here Tony. So you got this all working now? Did you also have to use different distinct `name` value for the DTS nodes as suggested earlier, or was this not needed?

Regards, Andreas

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AM625: dts for multiple SPI CS