Messages in this thread | | | Date | Mon, 20 Nov 2006 21:44:14 -0600 | From | Bill Gatliff <> | Subject | Re: [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls |
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David Brownell wrote:
>A fine example of two platform-specific notions. First, that GPIO signals >are muxed in that way ... they could easily have dedicated pins!! Second, >that there's even a one-to-one association between pins and GPIOs ... I'll >repeat the previous example of OMAP1, where certain GPIOs could come out on >any of several pins. And where some pins can be muxed to work with more >than one GPIO (but only one at a time, of course). Clearly, neither pin >refcounting nor GPIO claiming can be sufficient to prevent such problems ... > >
So, you're saying that if GPIOA1 can come out on pins ZZ1 and BB6, then there would be two unique "GPIO numbers", one for each possibility?
b.g.
-- Bill Gatliff bgat@billgatliff.com
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