Commit Message
Greg KH
Oct. 24, 2022, 11:31 a.m. UTC
From: Haibo Chen <haibo.chen@nxp.com> [ Upstream commit e7c4ebe2f9cd68588eb24ba4ed122e696e2d5272 ] Use the general touchscreen method to config the max pressure for touch tsc2046(data sheet suggest 8 bit pressure), otherwise, for ABS_PRESSURE, when config the same max and min value, weston will meet the following issue, [17:19:39.183] event1 - ADS7846 Touchscreen: is tagged by udev as: Touchscreen [17:19:39.183] event1 - ADS7846 Touchscreen: kernel bug: device has min == max on ABS_PRESSURE [17:19:39.183] event1 - ADS7846 Touchscreen: was rejected [17:19:39.183] event1 - not using input device '/dev/input/event1' This will then cause the APP weston-touch-calibrator can't list touch devices. root@imx6ul7d:~# weston-touch-calibrator could not load cursor 'dnd-move' could not load cursor 'dnd-copy' could not load cursor 'dnd-none' No devices listed. And accroding to binding Doc, "ti,x-max", "ti,y-max", "ti,pressure-max" belong to the deprecated properties, so remove them. Also for "ti,x-min", "ti,y-min", "ti,x-plate-ohms", the value set in dts equal to the default value in driver, so are redundant, also remove here. Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/arm/boot/dts/imx7d-sdb.dts | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts index 2f33c463cbce..83867357f135 100644 --- a/arch/arm/boot/dts/imx7d-sdb.dts +++ b/arch/arm/boot/dts/imx7d-sdb.dts @@ -126,12 +126,7 @@ interrupt-parent = <&gpio2>; interrupts = <29 0>; pendown-gpio = <&gpio2 29 GPIO_ACTIVE_HIGH>; - ti,x-min = /bits/ 16 <0>; - ti,x-max = /bits/ 16 <0>; - ti,y-min = /bits/ 16 <0>; - ti,y-max = /bits/ 16 <0>; - ti,pressure-max = /bits/ 16 <0>; - ti,x-plate-ohms = /bits/ 16 <400>; + touchscreen-max-pressure = <255>; wakeup-source; }; };