On Sat, Oct 05, 2013 at 12:25:10AM +0800, YouShenghui wrote: > At 2013-09-30 17:33:17,"Mark Brown" <[email protected]> wrote: >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
The formatting of your mail is really bad, I can barely read it. Please check the configuration of your mail program, there are some suggstions for common clients in Documentation/email-clients.txt. > Thanks for Mark for your answer. > But how could I trigger from /CS? Could I enable transfer in open syscall? I'd expect this to be done in-kernel, at least in the first instance.
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