Dmitry Torokhov <dmitry.torok...@gmail.com> writes:
> Hi Anatolij, Michael,
>
> I hope you can shed some light for me: why does pdm360ng have very
> elaborate set up for the "pendown" GPIO of the touchscreen? Can we
> simply fix the DTS in arch/powerpc/boot/dts/pdm360ng.dts and specify
> correct pendown GPIO there, as well as correct interrupt trigger,
> and remove most of arch/powerpc/platforms/512x/pdm360ng.c ?
Sorry, I don't know anything about this platform.
It looks like it's some sort of embedded display device? It's pretty old
and hasn't seen much activity for ~10 years.
> Something like this:
>
> diff --git a/arch/powerpc/boot/dts/pdm360ng.dts
> b/arch/powerpc/boot/dts/pdm360ng.dts
> index 67c3b9db75d7..5651bd9d9db3 100644
> --- a/arch/powerpc/boot/dts/pdm360ng.dts
> +++ b/arch/powerpc/boot/dts/pdm360ng.dts
> @@ -176,11 +176,12 @@ psc@11900 {
>
> /* ADS7845 touch screen controller */
> ts@0 {
> - compatible = "ti,ads7846";
> + compatible = "ti,ads7845";
> reg = <0x0>;
> spi-max-frequency = <3000000>;
> /* pen irq is GPIO25 */
> - interrupts = <78 0x8>;
> + interrupts = <78 IRQ_TYPE_LEVEL_LOW>;
> + pendown-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
> };
> };
>
>
>
> The reason I'm asking is that I want to remove support for platform
> data in ads7846 driver and pdm360ng is one of the last 3 users of it in
> the kernel.
I think go ahead with the change, and if anyone is still using this
device they can speak up if there's any problems.
cheers
