On Mon, Sep 30, 2013 at 01:20:42AM +0200, Tomasz Figa wrote: > Mark will probably know better, but AFAIK there is no API for slave mode > SPI available in Linux kernel. Please correct me if I'm wrong. That's correct. > The code mentioned in the post from your link was some internal vendor > code, which is unlikely to be available publicly. However support for > slave mode from hardware side seems more or less similar to master mode, > which means that assuming you can add some kernel API for it, the > modification to the spi-s3c64xx wouldn't be too big. There were some people working on slave mode (or at least talking about it) but I don't think they ever sent it. It'd probably just be the same as master mode but with transfers triggered from /CS instead of from driver action. The biggest trick would be making sure the transfer is running before the master actually starts sending data.
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