Linux kernel controller as subordinate SPI

Question

I am interested in working with SPI devices available on Linux. I have a special controller that supports SPI in both master and slave mode. I have to configure the SPI controller in slave mode.

My question is: Does the Linux frame support SPI slaves? I get asynchronous data on the SPI bus, I have to read this data and process it, and then send the command back.

Answer 1

No, Linux does not support running as a slave SPI.

From the Linux kernel SPI support overview :

A "struct spi_device" . Linux .

Answer 2

slave- SPI Linux - , i.MX28:

• https://community.nxp.com/thread/325404
• Marek Vasut http://www.spinics.net/lists/arm-kernel/msg190860.html

Ishaqe Ahamed SPI OMAP2 https://e2e.ti.com/support/embedded/linux/f/354/t/162748, .

- Intel Moorestown SPI Slave Controller, http://git.yoctoproject.org/cgit/cgit.cgi/meta-extras/plain/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.34-moorestown-spi-slave-controller-driver-1.1.patch.

, , , . - SPI.

Answer 3

SPI Linux v4.13-rc1.   SPI Linux:

( Linux) , SPI.

[...]

A "struct spi_device" .

[...]

/sys/devices/.../CTLR/slave... (un) SPI.

SPI ; "(null)" .

( "(null)", ).

/sys/class/spi_slave/spiB... symlink ( node) node, SPI "B". spiB. *, SPI SPI.

++/C .