From f206f6f56f3e168e7a642811c3d223930b5fa5af Mon Sep 17 00:00:00 2001
From: Elias Naur <mail@eliasnaur.com>
Date: Fri, 19 Apr 2024 13:10:46 +0200
Subject: [PATCH] ft6336: ignore bogus touch events

At least one ft6336 device reports all 255 values from the first read
after reset or poweron, even after waiting the specified 300ms reset
delay.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
---
 ft6336/ft6336.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ft6336/ft6336.go b/ft6336/ft6336.go
index e6eb2c6..6b2032d 100644
--- a/ft6336/ft6336.go
+++ b/ft6336/ft6336.go
@@ -80,7 +80,8 @@ func (d *Device) Read() []byte {
 func (d *Device) ReadTouchPoint() touch.Point {
 	d.Read()
 	z := 0xFFFFF
-	if d.buf[0] == 0 {
+	switch d.buf[0] {
+	case 0, 255:
 		z = 0
 	}