On Mon, 2013-11-11 at 09:58 +0100, Jack Wang wrote:
> Hi James,
> 
> About this gpio feature, do you think it's OK to implement with IOCTL

Definitely not via another strange ioctl

> or we can use exist bsg interface in libsas and add another function call?

My default thought is that it should go via bsg and libsas if you can
find a SES expander type emulation, which would be nice, but perhaps
complex.  Otherwise it should probably go via the gpio subsystem,
possibly via a SFF-8485 driver (which I don't think exists).

James

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