From nobody Mon Feb 9 00:01:16 2026 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 905EB26FA62; Fri, 9 May 2025 06:53:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746773613; cv=none; b=mllxJs8Nn+C3k5WbH33ADufHQ4pxOjNHSAadmCqJ/+zXmDEPrJlBzZJOyX4IRv5VO4q717da/afFSgE6N0oyR86Y/uaaJen7flpamA05jnmWXEBn8kUygWIcgrbJ3YkA0/35wdKvnWVM130OnuRXWO8+dt5e0M+zarE6qaRf1go= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746773613; c=relaxed/simple; bh=l//vUM087xV+nJfyiGsMAfxiiqa54Dz/LRTuZMSZkfs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=paCk/uinVE2+OtIoTvftBhI8OwY2j9dgBiYbVqxRgLPsumsak2ig7JKXHU0ZWAdL+2cuE/v4hCzl2wPNDzR8yvxNM5RCnlejdom2zgQK31MipgQUQO4hEfFwwBmPbRA1Lsu2eAHwjtQO3G1x466FHv/qypfK40PSZbS2Kogmgx0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kxjj6J5H; arc=none smtp.client-ip=209.85.128.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kxjj6J5H" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-43ea40a6e98so17659635e9.1; Thu, 08 May 2025 23:53:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1746773610; x=1747378410; darn=vger.kernel.org; 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=/mJxZyA18DAsV55MUHihR0kGwoLDmPI7gH5j+D/cQmY=; b=kxjj6J5Hz17qvteFavT+eUvJXRH5Qg4dTMzCk4RGkdgfLobtttaeMYmgtfihpMOReV K0sYGABC49WH4ocKk5Y+dlmHMeiucGMB1Vv2JsQUlkh7NMvjxXeK3OLo5f2kdPEP5CSz /pz0EdieNGYpwisyfqaX3WNNZdG8RCH0YrdI6+du6BAir4jopGByp5XJqz2EKGrc593E vq+P2O39mQ/jc3RnVRPHWOsoUig0ydpZXIDUqnZjTp+fXRHDagKAk62vmjYsHhRsr0DA QEc/1EWixJfWCbSjzyupHU8cRNiRKNxTfV0448oKucaFZ/ayIM2fcsuVPyWvQBj8nCkh sN+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746773610; x=1747378410; 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=/mJxZyA18DAsV55MUHihR0kGwoLDmPI7gH5j+D/cQmY=; b=O8e+uKjyoaAw0y9O3KzHDY6nfo8oqUK8OcW9g2+ZHkLiTqyOVTeBNLzBJMhNpKhmL7 YQmWqXprQLI7XtKfJXk+J/n3EGV8ZaAw454JVpIumqRp4eEl9ZxP/OajX8YEkwDrRr/H bhHDG8PrhYlMSAgY7NOAUNnL/IO/87YJiZ1lLj3Lmu2tixSi1g53VMg0EeJUAKdq/j4x HkzTkl/tD3YG7TDmVJuShkz5xRqPr1oJNBcTXgB0dBhNg3ql6ekUVI46LxzZZdOH3z0s oc46yUa4ZXqo9XcJfWaHIxFxxeD8klFgVr/CmeSHXHjTZZtjCrfW6RP+JBpJOIVfNcHK o+kA== X-Forwarded-Encrypted: i=1; AJvYcCUzDhnNMpjOdSil7fQMvDiDlkJUJpiQV5g7i4yNZguJE96gAA0BWk+IU6GR6Jd8lBRgDNPqVC6g6xwS@vger.kernel.org, AJvYcCVIeblh7tarTV5w4jwxETXduLaFDWKgbQDQTiC7w2otK8TVrZVdfzjAeJqiZMZLRLQKB+3GfuN2/v259O7q@vger.kernel.org, AJvYcCVqyQLiG3JNKKepHMz5VAKU5XKj3/QclEEfbmCVpdPxz7xkN8fORmM2OlyuuVPnvDhRuo6PMvGzmH7q@vger.kernel.org X-Gm-Message-State: AOJu0YwX6Rg6joqyRLd10QLhaswD2gJ4eB+ISEm22kGiO03s4007zrvf Xx7mQpu5ALkEB4WRpznt4jEYHNAhd/u/LjSV+U9EJMToXd04zvgPAFLxoflR X-Gm-Gg: ASbGncsoqV8Mqm5+xeJl9urtoOEnZcS7jVMLV/O/muyW3koP8tHnKQmJwOsOtotqagP FPrNQFsyVIfe+udtSf6OuQHQ6AP6ItDou6Ix04pdb7JpWeVsJDJyp4rm+XSEsGwPcy4CNel+r8f zsJvLCyXW+bp0/rhnb79WnYFrUkwDEkzNq+jYN4LSoSBTkRueYEsMJs4UJ6cuuptz8xEm3r3HWR BA22BMswE/7xNBE+uvw3l4iQi01/PMzcaEuDMjscrkzG0FdzIpDyHjOlJWP4QvdM6HJ224+yRaR Q6i1l+slZKJdoaDi4M68bQVjRjJ0ydEeOoE7M59r0nTULxu/xwWRyCUo3fnOdPGmHg== X-Google-Smtp-Source: AGHT+IECt1Fjb2mC/ICq4YSSW6IpGkJhFrpmupSt1M2faiqeR6nyn/ZZhIRL6VeBFBay229oiKvh9g== X-Received: by 2002:a05:600c:6307:b0:43b:c284:5bc2 with SMTP id 5b1f17b1804b1-442d6c36448mr20301805e9.0.1746773609804; Thu, 08 May 2025 23:53:29 -0700 (PDT) Received: from tempest2.110.lan (xt27dd.stansat.pl. [83.243.39.221]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442d67d5c2asm19276315e9.1.2025.05.08.23.53.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 May 2025 23:53:29 -0700 (PDT) From: Pawel Dembicki To: linux-hwmon@vger.kernel.org Cc: Pawel Dembicki , Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Noah Wang , Michal Simek , Naresh Solanki , Fabio Estevam , Grant Peltier , Laurent Pinchart , Shen Lichuan , Peter Zijlstra , Greg KH , Charles Hsu , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v2 4/5] hwmon: pmbus: mpq8785: Implement VOUT feedback resistor divider ratio configuration Date: Fri, 9 May 2025 08:51:08 +0200 Message-ID: <20250509065237.2392692-5-paweldembicki@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250509065237.2392692-1-paweldembicki@gmail.com> References: <20250509065237.2392692-1-paweldembicki@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement support for setting the VOUT_SCALE_LOOP PMBus register based on an optional device tree property "mps,vout-fb-divider-ratio-permille". This allows the driver to provide the correct VOUT value depending on the feedback voltage divider configuration for chips where the bootloader does not configure the VOUT_SCALE_LOOP register. Signed-off-by: Pawel Dembicki --- v2: - rename property to mps,vout-fb-divider-ratio-permille - add register value range checking --- drivers/hwmon/pmbus/mpq8785.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/hwmon/pmbus/mpq8785.c b/drivers/hwmon/pmbus/mpq8785.c index 34245d0d2125..1d0e7ac9daf4 100644 --- a/drivers/hwmon/pmbus/mpq8785.c +++ b/drivers/hwmon/pmbus/mpq8785.c @@ -12,6 +12,13 @@ =20 enum chips { mpq8785, mpm82504, mpm3695, mpm3695_25 }; =20 +static u16 voltage_scale_loop_max_val[] =3D { + GENMASK(10, 0), /* mpq8785 */ + GENMASK(9, 0), /* mpm82504 */ + GENMASK(9, 0), /* mpm3695 */ + GENMASK(11, 0), /* mpm3695_25 */ +}; + static int mpq8785_identify(struct i2c_client *client, struct pmbus_driver_info *info) { @@ -99,6 +106,8 @@ static int mpq8785_probe(struct i2c_client *client) struct device *dev =3D &client->dev; struct pmbus_driver_info *info; enum chips chip_id; + u32 voltage_scale; + int ret; =20 info =3D devm_kmemdup(dev, &mpq8785_info, sizeof(*info), GFP_KERNEL); if (!info) @@ -126,6 +135,18 @@ static int mpq8785_probe(struct i2c_client *client) return -ENODEV; } =20 + if (!of_property_read_u32(dev->of_node, + "mps,vout-fb-divider-ratio-permille", + &voltage_scale)) { + if (voltage_scale > voltage_scale_loop_max_val[chip_id]) + return -EINVAL; + + ret =3D i2c_smbus_write_word_data(client, PMBUS_VOUT_SCALE_LOOP, + voltage_scale); + if (ret) + return ret; + } + return pmbus_do_probe(client, info); }; =20 --=20 2.43.0