Messages in this thread |  | | From | Alistair Francis <> | Subject | [PATCH 0/4] Add support for the Cypress cyttsp5 | Date | Mon, 25 Oct 2021 21:42:10 +1000 |
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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.
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
Alistair Francis (2): ARM: imx_v6_v7_defconfig: Enable the cyttsp5 touchscreen ARM: dts: imx7d: remarkable2: Enable the cyttsp5
Mylène Josserand (2): Input: Add driver for Cypress Generation 5 touchscreen Documentation: DT: bindings: input: Add documentation for cyttsp5
.../input/touchscreen/cypress,cyttsp5.yaml | 72 ++ arch/arm/boot/dts/imx7d-remarkable2.dts | 88 ++ arch/arm/configs/imx_v6_v7_defconfig | 1 + drivers/input/touchscreen/Kconfig | 14 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/cyttsp5.c | 1129 +++++++++++++++++ 6 files changed, 1305 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,cyttsp5.yaml create mode 100644 drivers/input/touchscreen/cyttsp5.c
-- 2.31.1
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