On Fri, Mar 6, 2009 at 2:29 PM, Jon Smirl <jonsm...@gmail.com> wrote:
> I'm using a GPT pin in input capture mode to implement IR. I attached
> my GPT driver code. I can convert to your API. That's a really cheap
> way to do IR, just IR sensor, resistor and a cap.
The driver I posted can't do input capture mode yet, but it shouldn't
be too difficult to add. Just another api function for setting the
mode I think. I don't have a use for that yet, so I haven't thought
much about it. Feel free to suggest what you think the API should
look like.
> This is my old device tree, what should the new one look like?
>
> ...@670 { /* General Purpose Timer 6 in Input mode */
> compatible = "gpt-ir";
> cell-index = <7>;
> reg = <0x670 0x10>;
> interrupts = <0x1 0x10 0x0>;
> interrupt-parent = <&mpc5200_pic>;
> };
You'd want a node for the IR device which uses the GPT node as its
interrupt controller.
so:
gpt7: g...@670 {
compatible = "fsl,mpc5200b-gpt"
reg = <0x670 0x10>;
interrupt = <1 16 0>;
interrupt-controller;
#interrupt-cells = <1>;
};
Then elsewhere:
ir {
compatible = "digispeaker,ir"; // or whatever best matches your board
interrupt-parent = <&gpt>;
interrupts = <0>; // IIRC, '0' means irq on both edges for
the GPT irq controller
};
g.
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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