lkml.org 
[lkml]   [2022]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v7 0/4] Add support for the Cypress cyttsp5
On Wed, Mar 23, 2022 at 10:00 PM Alistair Francis
<alistair@alistair23.me> wrote:
>
> This patch series builds on top of [1] and adds support for the cyttsp5
> touchscreen controller for the reMarkable 2.
>
> I first tried to add an I2C HID device. Although the cyttsp5 has some HID
> looking aspects it is not HID compatible. Just in trying to probe the device
> I found:
> - The HID descriptor has extra padding
> - The HID descriptor sets the high bytes of the descriptor length
> - The HID descriptor has extra unrecognised tags
> - The HID reset command doesn't appear to work
>
> I don't think there is a way to use the I2C HID framework with the cyttsp5.
> For anyone interested you can see the work here [2]. In that branch though I
> can only obtain a HID descriptor, nothing else works without more core
> changes.
>
> So instead I rebased the series from [1]. Converted to the new yaml DTS
> documentation, added regulator support and fixed a x/y miscalculation bug.

The DT bindings have been reviewed, any comments on the driver
implementation? It has been tested on a few different devices

Alistair

>
> 1: https://lwn.net/ml/linux-kernel/20180703094309.18514-1-mylene.josserand@bootlin.com/
> 2: https://github.com/alistair23/linux/commits/rM2-mainline-cyttsp5-hid
>
> v7:
> - Fix device tree warnings
> v6:
> - Use reg for the button properties
> v5:
> - Address review comments from v4
>
> Alistair Francis (4):
> Input: Add driver for Cypress Generation 5 touchscreen
> dt-bindings: input: Add Cypress TT2100 touchscreen controller
> ARM: imx_v6_v7_defconfig: Enable the cyttsp5 touchscreen
> ARM: dts: imx7d-remarkable2: Enable the cyttsp5
>
> .../input/touchscreen/cypress,tt21000.yaml | 101 ++
> arch/arm/boot/dts/imx7d-remarkable2.dts | 100 ++
> arch/arm/configs/imx_v6_v7_defconfig | 1 +
> drivers/input/touchscreen/Kconfig | 16 +
> drivers/input/touchscreen/Makefile | 1 +
> drivers/input/touchscreen/cyttsp5.c | 902 ++++++++++++++++++
> 6 files changed, 1121 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml
> create mode 100644 drivers/input/touchscreen/cyttsp5.c
>
> --
> 2.35.1
>

\
 
 \ /
  Last update: 2022-04-20 14:25    [W:0.062 / U:5.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site