From patchwork Thu Dec 3 13:12:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 338004 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 321F5C63777 for ; Thu, 3 Dec 2020 13:23:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CACC124730 for ; Thu, 3 Dec 2020 13:23:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387671AbgLCNWt (ORCPT ); Thu, 3 Dec 2020 08:22:49 -0500 Received: from mo4-p02-ob.smtp.rzone.de ([85.215.255.83]:25626 "EHLO mo4-p02-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387653AbgLCNWt (ORCPT ); Thu, 3 Dec 2020 08:22:49 -0500 X-Greylist: delayed 355 seconds by postgrey-1.27 at vger.kernel.org; Thu, 03 Dec 2020 08:22:48 EST DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1607001597; s=strato-dkim-0002; d=gerhold.net; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=roHgNlmN+vU8M22GigtIWTMULnCCY+UXLgvb6z4Xc0E=; b=tN+WuVFkbyHJtY6s+ths9o3W50ynXhikRCPq1OvbqDMylUBdKX2sKOp43/pSujcV3J 9ALoLcoK0UJfovjZumWG8fHVa4NzMbm+kWlT5En5B8jQqN4FmKhETiGGXEwBgv9rlHUB uVDg+Asi5XF0kNnnmYbsfUZOV3aD+FZKmLLKGPslIQFR55Oi81pgpeW7wdhVBDAwC74T L33gDIxp6+Sks9CuUTLl/LPVC6qtua5a4nzV9AKbiJIHKn4h0P8jmZvWkNGYGd70bd8U p0aGbj/DOJrBWEY0Tzsivt7D8kdiKn9u6MkK49YVWLdo9g5oAxkUw8uVbhnD7ccJZbfW AnDA== X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB5G6JlbU=" X-RZG-CLASS-ID: mo00 Received: from localhost.localdomain by smtp.strato.de (RZmta 47.3.4 DYNA|AUTH) with ESMTPSA id Z061efwB3DDvqid (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 3 Dec 2020 14:13:57 +0100 (CET) From: Stephan Gerhold To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Stephan Gerhold , Linus Walleij Subject: [PATCH 2/3] dt-bindings: Input: tm2-touchkey - document vddio-supply Date: Thu, 3 Dec 2020 14:12:41 +0100 Message-Id: <20201203131242.44397-2-stephan@gerhold.net> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201203131242.44397-1-stephan@gerhold.net> References: <20201203131242.44397-1-stephan@gerhold.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The Samsung touchkey controllers are often used with external pull-up for the interrupt line and the I2C lines, so we might need to enable a regulator to bring the lines into usable state. Otherwise, this might cause spurious interrupts and reading from I2C will fail. Document support for a "vddio-supply" that is enabled by the tm2-touchkey driver so that the regulator gets enabled when needed. Cc: Linus Walleij Signed-off-by: Stephan Gerhold --- .../devicetree/bindings/input/cypress,tm2-touchkey.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml index 90d4def83182..52dca8b64081 100644 --- a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml +++ b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml @@ -37,6 +37,11 @@ properties: vcc-supply: description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU). + vddio-supply: + description: | + Optional regulator that provides digital I/O voltage, + e.g. for pulling up the interrupt line or the I2C pins. + linux,keycodes: minItems: 1 maxItems: 4