On Tue, Oct 26, 2021 at 5:16 PM Andreas Kemnade [off-list ref] wrote:

On Tue, 26 Oct 2021 01:18:24 +0200
Linus Walleij [off-list ref] wrote:

quoted

Hi Alistair,

On Mon, Oct 25, 2021 at 1:42 PM Alistair Francis [off-list ref] wrote:

quoted

From: Mylène Josserand <redacted>

Add the Cypress TrueTouch Generation 5 touchscreen device tree bindings
documentation. It can use I2C or SPI bus.
This touchscreen can handle some defined zone that are designed and
sent as button. To be able to customize the keycode sent, the
"linux,code" property in a "button" sub-node can be used.

Signed-off-by: Mylène Josserand <redacted>
Message-Id: [ref]
Signed-off-by: Alistair Francis <redacted>

quoted

+title: Cypress cyttsp touchscreen controller, generation 5

(...)

quoted

+  compatible:
+    const: cypress,cyttsp5

Is this the real product name? When I rewrote the bindings for
the original "CYTTSP", actually "Cypress TrueTouch Standard Product"
it came out that the actual product names were CY8CTMA340
and CY8CTMA341. "CYTTSP" was a marketing name for the
whole family.

See
Documentation/devicetree/bindings/input/touchscreen/cypress,cy8ctma340.yaml

If the actual products have some product names such as
CY8* then use these as compatibles instead and just write in the
decription that it is Cypress TrueTouch Standard Product series 5.

Since I have uptreamed 4 devicetrees containing that touchscreen (and
marked that as todo). I tried to look it up:
https://fccid.io/NOIKBN249/Internal-Photos/Internal-Photos-3802584.pdf

Page 4 might be interesting. Something below that 3d code (zbarimg does
not recognize it) Peeling up the label reveals:
TT21000
-44LQI
1802 TWN
6491U0 (two illegible characters)

You find it in the net:
https://www.digipart.com/part/TT21000-48LQI36T

Thanks!

So I'll change the name to cypress,tt21000

Alistair

Regards,
Andreas