On Tue, Apr 29, 2008 at 10:46:29AM +0200, Hans Rosenfeld wrote: > On Mon, Apr 28, 2008 at 05:59:24PM -0400, der Mouse wrote: > > One thing I would suggest is that you document which order the data > > pins and the control pins are written in, when changing both. (Or does > > the scaffolding allow userland to control that order? I don't know > > gpiobus.) > > The current gpio API does not allow changing more than one pin at a > time, so you are forced to implement the order yourself. There is also > no distinction between data pins, status pins and control pins, they are > all just gpio pins. > > For some future extension of the gpio driver, I thought about adding an > ioctl() to specify a sequence of operations to perform, complete with > timing information. The actual operations would still be carried out > sequentially by the gpio driver, but you wouldn't need an ioctl() for > every read or write of a pin. But this still needs some more thought. I think that belongs to a userspace lib, anyway. -- Quentin Garnier - cube%cubidou.net@localhost - cube%NetBSD.org@localhost "See the look on my face from staying too long in one place [...] every time the morning breaks I know I'm closer to falling" KT Tunstall, Saving My Face, Drastic Fantastic, 2007.
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