On Mon, Feb 02, 2015 at 09:48:46PM +0000, Roman Volkov wrote:
> Documentation for 'intel,8042' DT compatible node.
>
> Signed-off-by: Tony Prisk <linux@xxxxxxxxxxxxxxx>
> Signed-off-by: Roman Volkov <v1ron@xxxxxxxxx>
> ---
> .../devicetree/bindings/input/intel-8042.txt | 29 ++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/intel-8042.txt
>
> diff --git a/Documentation/devicetree/bindings/input/intel-8042.txt b/Documentation/devicetree/bindings/input/intel-8042.txt
> new file mode 100644
> index 0000000..2aea7ec
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/intel-8042.txt
> @@ -0,0 +1,29 @@
> +* Intel 8042 Keyboard Controller
> +
> +Required properties:
> +- compatible: should be "intel,8042"
> +- regs: memory for keyboard controller
> +- interrupts: two interrupts should be specified (keyboard and aux)
Is it possible only one of these is wired up?
It might be worth using interrupt-names.
> +- command-reg: offset in memory for command register
> +- status-reg: offset in memory for status register
> +- data-reg: offset in memory for data register
> +
> +Optional properties:
> +- init-reset: Controller should be reset on init and cleanup
Why is this necessary? Can't we just always reset it?
> +
> +Optional Linux-specific properties:
> +- linux,kbd_phys_desc: defaults to i8042/serio0
> +- linux,aux_phys_desc: defaults to i8042/serio1
> +- linux,mux_phys_desc: defaults to i8042/serio%d
As a general note, s/_/-/ in property names please.
That said, I don't follow why we should have these at all. I don't
understand what the description is intended to mean.
In general we want to avoid Linux-specific properties. If a DTB needs to
know about the inernals of an OS it's likely to be fragile and broken
over time.
> +
> +
> +Example:
> + keyboard@d8008800 {
> + compatible = "intel,8042";
> + reg = <0xd8008800 0x100>;
> + interrupts = <23 4>;
If this is intended to be two interrupts, please bracket them
individually, e.g.
interrupts = <23>, <4>;
> + command-reg = <0x04>;
> + status-reg = <0x04>;
Same address?
> + data-reg = <0x00>;
> + mux-ports = <2>;
This wasn't documented above.
Thanks,
Mark.
> + };
> --
> 2.2.2
>
>
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