AM437x spi0 slave mode

Boch Zhou

Hi,

I want to configurate am437x spi0 as slave mode, but I don't know how to modify the am437x-evm.dts or drivers/spi/spi-omap2-mcspi.c.

The tools that I am using:

ti-processor-sdk-linux-am437x-evm-01.00.00.03

linux-3.14.43

Regards,

Boch

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

SPI Slave mode is not supported in the Linux SDK. See processors.wiki.ti.com/.../Linux_Core_SPI_User's_Guide

0 Boch Zhou over 9 years ago in reply to Biser Gatchev-XID

Prodigy 111 points

Hi，

Thanks for your reply.

According to the TRM, McSPI is in slave mode when the bit MS of the register MCSPI_MODULCTRL is set.

so, I just set this bit to 1h? other more?

BR,

Boch

0 Biser Gatchev-XID over 9 years ago in reply to Boch Zhou

TI__Guru**** 393215 points

The initialization sequence is described in section 26.3.11.1 from the AM437x TRM Rev. E.

0 Sergey Kozyrev over 9 years ago

Prodigy 60 points

Hi, Boch.

Have you got the driver with demanded functionality?

Because I also need a SPI slave driver for Linux. It seems to me that so much people ask it, but nobody has.

Can you share it? :) Thanks.

Best regards,

Sergey.

0 Boch Zhou over 9 years ago in reply to Sergey Kozyrev

Prodigy 111 points

Hi Sergey,

For am437x, McSPI is in slave mode when the bit MS of the register MCSPI_MODULCTRL is set. You can set MS in drivers/spi/spi-omap2-mcspi.c.

BR,
Boch.

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AM437x spi0 slave mode