From patchwork Thu Dec 2 12:20:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Alistair X-Patchwork-Id: 519959 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4EEA5C433EF for ; Thu, 2 Dec 2021 12:20:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357937AbhLBMYC (ORCPT ); Thu, 2 Dec 2021 07:24:02 -0500 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:59649 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357932AbhLBMXv (ORCPT ); Thu, 2 Dec 2021 07:23:51 -0500 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id 3E10558030B; Thu, 2 Dec 2021 07:20:28 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Thu, 02 Dec 2021 07:20:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alistair23.me; h=from:to:cc:subject:date:message-id:mime-version:content-type :content-transfer-encoding; s=fm2; bh=nFpd1cboO2xZsxTL6uy9AKL5Uy 6bj9BzOleJyoKqzCo=; b=x0Bb2FkWXHXVxFIephoeZcZ0kVvUq9EKv8PsZzqTKg 37e9wYLc58oVY2mtNO/5JeVDzVvUatA+WLvBjJz2ZBskee+3fUNVl9bGAngspM1j e2CBN3RQQ7cFMU6dRtA0YDboW7lB2DPYWIjzWRI1upIHvBBA25Y68xQ4cJl0rsE5 ALR0U9NVmx1q/ivoJwJI5rFWExFr7R0Q6ztEye3zKDKEXXibaQFH/UAqLpYJQ/p5 kxLYh1NUXqit2LJQYIqmSMs4TARPnWjd6rv7PwOmWrPQR5lhlN5ASHFkt9i9TmBk rnFLNddLKbe/k+iS5wx8vMg96n5tj7kIAoujsNyGSlqw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=nFpd1c boO2xZsxTL6uy9AKL5Uy6bj9BzOleJyoKqzCo=; b=Mk0lZ9Gd2+G4bm/d+6ZNsX uOySrk82VpgDxnrvN/XaTsLIKEWUkg6fSuaaLHmUP0UDzAGGZ6lIetrKjPRtLyPt xVW5MCB6W4BOLCYnYzQiJT6BG79wJberk1B34swKjN44ythE+ZXM3EzhZcP/Hdk4 FwHPp9fiARCiHvQKecej96kJBqnJLBKcUvh0lH89OZwPkrNg1mzW8jUlEUI3dHqI B4OH+BDu+udBg8nJBm2Yjt4OsATm+682Aq8PDaiU4T1a19eeXgpRdTeP82+VhCZR XqIg07tg5wkIufUMZ5hYja81yYsa31+hVRp4GdqSY4hR8ztkM1TW9uBm/Gcg571w == X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrieehgdeflecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffogggtgfesthhqredtre dtjeenucfhrhhomheptehlihhsthgrihhrucfhrhgrnhgtihhsuceorghlihhsthgrihhr segrlhhishhtrghirhdvfedrmhgvqeenucggtffrrghtthgvrhhnpeffledvgeevfeevfe dvvdffieetfefgjeevgeeitefhkeeghfelueekhfejheffgfenucffohhmrghinheplhif nhdrnhgvthdpghhithhhuhgsrdgtohhmnecuvehluhhsthgvrhfuihiivgeptdenucfrrg hrrghmpehmrghilhhfrhhomheprghlihhsthgrihhrsegrlhhishhtrghirhdvfedrmhgv X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 2 Dec 2021 07:20:23 -0500 (EST) From: Alistair Francis To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: robh+dt@kernel.org, andreas@kemnade.info, alistair23@gmail.com, dmitry.torokhov@gmail.com, linus.walleij@linaro.org, rydberg@bitmath.org, Alistair Francis Subject: [PATCH v3 0/4] Add support for the Cypress cyttsp5 Date: Thu, 2 Dec 2021 22:20:17 +1000 Message-Id: <20211202122021.43124-1-alistair@alistair23.me> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 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,tt21000.yaml | 92 ++ arch/arm/boot/dts/imx7d-remarkable2.dts | 89 ++ arch/arm/configs/imx_v6_v7_defconfig | 1 + drivers/input/touchscreen/Kconfig | 14 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/cyttsp5.c | 1002 +++++++++++++++++ 6 files changed, 1199 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml create mode 100644 drivers/input/touchscreen/cyttsp5.c