From patchwork Wed May 20 07:31:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Albrieux X-Patchwork-Id: 11559545 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 605CC912 for ; Wed, 20 May 2020 07:32:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 459CB205CB for ; Wed, 20 May 2020 07:32:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tqqqdgqA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726369AbgETHcA (ORCPT ); Wed, 20 May 2020 03:32:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726309AbgETHcA (ORCPT ); Wed, 20 May 2020 03:32:00 -0400 Received: from mail-qk1-x741.google.com (mail-qk1-x741.google.com [IPv6:2607:f8b0:4864:20::741]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFC90C061A0E; Wed, 20 May 2020 00:31:58 -0700 (PDT) Received: by mail-qk1-x741.google.com with SMTP id m11so2651394qka.4; Wed, 20 May 2020 00:31:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=iRfEPrYZ1xtYGkhU1NkXMfy3ReHbbp0NPMUXh7YcI8Y=; b=tqqqdgqAgXUZ8EmtroT3Yt7zsjmAJHxh+ub58M+OQL5p6YNwZpfDxx6PsfakqLwWfd rFHJqXE+ruuiBDk1ZwmM4SlVbJ5fUsPw0awd7rb0qB7PI/RHHy1VUsqyEiYNK4yMhStP qDsLb2ufzLl8hUoYsfc1Lln2T5Ju5+3DdAkJjMxt+El2lsvMVdfHKPcTcwluXJkfUksz x8Li4KVYaWHNdH4yim6EQm0LOVMVfi9JC5E8eyq9H9EpQ/tXMxoEJX/qlyOZic75/cEh LpdrvPKYH0Bnjp99k0DLBp46ilBRbPUNH6q8snhM+s++WRnWioIEH759JjYMyW3v/BKD w8kQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=iRfEPrYZ1xtYGkhU1NkXMfy3ReHbbp0NPMUXh7YcI8Y=; b=NI7Q/wf17SjGcFcviduEBPZyXunWK9TKTphphE6R5tcp36WXPTRD0wFszowh4mg8Kx Cv41eFYNvM+hVMTIVsZGYaWP8TH10Z2JqaqozR7wFeiKCJQfHLEEwrW4lNJYi4N2ICGm nvoSYw8a2yBWRPWjXyx/Pgs7gbKHyHtVUGTCmL16KwYswYQdYup8qE3kZcs4swQz6Tlo 6EcPYneT6RXCJod83WR7DIi1zQjAeof7krc9ifDeFt9X02cA8VvHweSEgb+rjeke0ife UVZM8z4LMgjW3y5aW6QGqz71CIZS3AMippzVzTgNhUVFxodX8fT+P7Vk7C2RaqrdBIAz FWbg== X-Gm-Message-State: AOAM530cm3gmj9ZlbE66HmzT/bILRLOuzcT4b2ocQW3HzqGeHb/SaLzv 2+7bPR5lCHd1EngYNy7eVUCSFkK8v/gaIg== X-Google-Smtp-Source: ABdhPJwN+QhzLieNYik7JjnCgm1CC3oj2eBS936pW1H5qbjqJ46767HRcQCuRtpkAbukrCi2EzGy8A== X-Received: by 2002:a37:8c45:: with SMTP id o66mr3288674qkd.392.1589959917527; Wed, 20 May 2020 00:31:57 -0700 (PDT) Received: from ict14-OptiPlex-980.kataweb.it ([178.23.248.46]) by smtp.googlemail.com with ESMTPSA id w9sm1702540qtn.29.2020.05.20.00.31.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2020 00:31:57 -0700 (PDT) From: Jonathan Albrieux To: linux-kernel@vger.kernel.org Cc: ~postmarketos/upstreaming@lists.sr.ht, Jonathan Albrieux , Allison Randal , Andy Shevchenko , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), Greg Kroah-Hartman , Hartmut Knaack , Jilayne Lovejoy , Jonathan Cameron , Kate Stewart , Lars-Peter Clausen , Linus Walleij , linux-iio@vger.kernel.org (open list:IIO SUBSYSTEM AND DRIVERS), Peter Meerwald-Stadler , Thomas Gleixner , Jonathan Cameron , Rob Herring Subject: [PATCH v4 2/4] dt-bindings: iio: magnetometer: ak8975: add gpio reset support Date: Wed, 20 May 2020 09:31:14 +0200 Message-Id: <20200520073125.30808-3-jonathan.albrieux@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200520073125.30808-1-jonathan.albrieux@gmail.com> References: <20200520073125.30808-1-jonathan.albrieux@gmail.com> Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add reset-gpio support. Without reset's deassertion during ak8975_power_on(), driver's probe fails on ak8975_who_i_am() while checking for device identity for AK09911 chip. AK09911 has an active low reset gpio to handle register's reset. AK09911 datasheet says that, if not used, reset pin should be connected to VID. This patch emulates this situation. Signed-off-by: Jonathan Albrieux --- .../devicetree/bindings/iio/magnetometer/ak8975.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml index 9d5b1e6908d1..d83f7e212658 100644 --- a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml +++ b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.yaml @@ -41,6 +41,11 @@ properties: mount-matrix: description: an optional 3x3 mounting rotation matrix + reset-gpio: + description: | + an optional pin needed for AK09911 to set the reset state. This should + be usually active low + required: - compatible - reg @@ -58,6 +63,7 @@ examples: reg = <0x0c>; gpios = <&gpj0 7 GPIO_ACTIVE_HIGH>; vdd-supply = <&ldo_3v3_gnss>; + reset-gpio = <&msmgpio 111 GPIO_ACTIVE_LOW>; mount-matrix = "-0.984807753012208", /* x0 */ "0", /* y0 */ "-0.173648177666930", /* z0 */