From patchwork Wed Jun 7 21:49:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 13271377 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 D2EB0C7EE23 for ; Wed, 7 Jun 2023 21:53:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230387AbjFGVxM (ORCPT ); Wed, 7 Jun 2023 17:53:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231959AbjFGVxK (ORCPT ); Wed, 7 Jun 2023 17:53:10 -0400 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45AF41BFF for ; Wed, 7 Jun 2023 14:53:09 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-652328c18d5so3865790b3a.1 for ; Wed, 07 Jun 2023 14:53:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1686174789; x=1688766789; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7J6bms7QMm9w3IzcQHeVQuT7VvkTcEsATD8y00OpeXw=; b=lNOTHZUjf8JdjTbU6E6X/mqcY+Zwnqg/qRWUnY9Mwi3PCLRhThFa5YBIH0SWb6uJ1+ rFr2+HfY1hSDBAI2d85k+n6W6gF4wlv/tcnXPvydjr0FRk5O5EZevrutN13VURxdh3VR aQknU7zcndxDLitCgvK20aLmQb01W2KregYks= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686174789; x=1688766789; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7J6bms7QMm9w3IzcQHeVQuT7VvkTcEsATD8y00OpeXw=; b=arpcm1f23vzIB2gcBS/LJ3ZCLM99Yhk9WTiHuv8Fkjj7zyaOFnqWDil6Z1ev3YhKJj ZKwIaHEPsJSadWvELQTn0O73BzGpgL4uGNGUpwCXFcbQ/XN6XY+6p6KSCYpwLcUMDDMu 6YEzArBSeu5ZgPzNyqkFoPsm8AI/lMNeaZYTQ8Z82yG0MQ8LaTUTFm2BCiS4A0HjWDgt Q/DgMug5ymZM6Jpm6SEzXdPbYfDzxlLMydJWsQ5uJhuc5ypdSq2yn5lnvA0fpCZo8cxb k+gUeCJaah5pIt+IukE7dELYQ2XPaXwhsJCHovSDtp+RQWlUQEjXy9VjPKs4hGyL0J21 6WKQ== X-Gm-Message-State: AC+VfDySQmBhjW4fngvAQddrDrNNbEmq07LD0HUnp+FusdS7l3Cn+YD2 0w2uPf7E7L+CGw9ue6oTULVk6g== X-Google-Smtp-Source: ACHHUZ6msq2zIZIoWR6/BNnd7gqzLUkkb+f55DYioqbBeFy7Kfz5MTf1YZEWIMbYfJuT7GP7UJVbsw== X-Received: by 2002:a05:6a21:328d:b0:10b:2214:7ab0 with SMTP id yt13-20020a056a21328d00b0010b22147ab0mr2370510pzb.21.1686174788778; Wed, 07 Jun 2023 14:53:08 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:9d:2:34b2:b638:6b53:f6c2]) by smtp.gmail.com with ESMTPSA id j25-20020aa78d19000000b0065dd1e7c2c1sm1376486pfe.63.2023.06.07.14.53.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jun 2023 14:53:08 -0700 (PDT) From: Douglas Anderson To: Jiri Kosina , Benjamin Tissoires , Bjorn Andersson , Konrad Dybcio , Rob Herring , Frank Rowand , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Sam Ravnborg , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann Cc: dri-devel@lists.freedesktop.org, Dmitry Torokhov , linux-input@vger.kernel.org, Daniel Vetter , linux-kernel@vger.kernel.org, hsinyi@google.com, cros-qcom-dts-watchers@chromium.org, devicetree@vger.kernel.org, yangcong5@huaqin.corp-partner.google.com, linux-arm-msm@vger.kernel.org, Chris Morgan , Douglas Anderson Subject: [PATCH v2 01/10] dt-bindings: HID: i2c-hid: Add "panel" property to i2c-hid backed touchscreens Date: Wed, 7 Jun 2023 14:49:23 -0700 Message-ID: <20230607144931.v2.1.Id68e30343bb1e11470582a9078b086176cfec46b@changeid> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog In-Reply-To: <20230607215224.2067679-1-dianders@chromium.org> References: <20230607215224.2067679-1-dianders@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org As talked about in the patch ("drm/panel: Add a way for other devices to follow panel state"), touchscreens that are connected to panels are generally expected to be power sequenced together with the panel they're attached to. Today, nothing provides information allowing you to find out that a touchscreen is connected to a panel. Let's add a phandle for this. The proerty is added to the generic touchscreen bindings and then enabled in the bindings for the i2c-hid backed devices. This can and should be added for other touchscreens in the future, but for now let's start small. Signed-off-by: Douglas Anderson Reviewed-by: Krzysztof Kozlowski --- Changes in v2: - Move the description to the generic touchscreen.yaml. - Update the desc to make it clearer it's only for integrated devices. Documentation/devicetree/bindings/input/elan,ekth6915.yaml | 5 +++++ .../devicetree/bindings/input/goodix,gt7375p.yaml | 5 +++++ Documentation/devicetree/bindings/input/hid-over-i2c.yaml | 2 ++ .../devicetree/bindings/input/touchscreen/touchscreen.yaml | 7 +++++++ 4 files changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml index 05e6f2df604c..3e2d216c6432 100644 --- a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml +++ b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml @@ -13,6 +13,9 @@ description: Supports the Elan eKTH6915 touchscreen controller. This touchscreen controller uses the i2c-hid protocol with a reset GPIO. +allOf: + - $ref: /schemas/input/touchscreen/touchscreen.yaml# + properties: compatible: items: @@ -24,6 +27,8 @@ properties: interrupts: maxItems: 1 + panel: true + reset-gpios: description: Reset GPIO; not all touchscreens using eKTH6915 hook this up. diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml index ce18d7dadae2..72212382d702 100644 --- a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml +++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml @@ -14,6 +14,9 @@ description: This touchscreen uses the i2c-hid protocol but has some non-standard power sequencing required. +allOf: + - $ref: /schemas/input/touchscreen/touchscreen.yaml# + properties: compatible: oneOf: @@ -30,6 +33,8 @@ properties: interrupts: maxItems: 1 + panel: true + reset-gpios: true diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml index 7156b08f7645..138caad96a29 100644 --- a/Documentation/devicetree/bindings/input/hid-over-i2c.yaml +++ b/Documentation/devicetree/bindings/input/hid-over-i2c.yaml @@ -44,6 +44,8 @@ properties: description: HID descriptor address $ref: /schemas/types.yaml#/definitions/uint32 + panel: true + post-power-on-delay-ms: description: Time required by the device after enabling its regulators or powering it on, before it is ready for communication. diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml index 895592da9626..431c13335c40 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml @@ -10,6 +10,13 @@ maintainers: - Dmitry Torokhov properties: + panel: + description: If this touchscreen is integrally connected to a panel, this + is a reference to that panel. The presence of this reference indicates + that the touchscreen should be power sequenced together with the panel + and that they may share power and/or reset signals. + $ref: /schemas/types.yaml#/definitions/phandle + touchscreen-min-x: description: minimum x coordinate reported $ref: /schemas/types.yaml#/definitions/uint32