From patchwork Wed Dec 8 21:37:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zev Weiss X-Patchwork-Id: 12665285 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 43BD4C433F5 for ; Wed, 8 Dec 2021 21:37:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238297AbhLHVks (ORCPT ); Wed, 8 Dec 2021 16:40:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229735AbhLHVks (ORCPT ); Wed, 8 Dec 2021 16:40:48 -0500 Received: from thorn.bewilderbeest.net (thorn.bewilderbeest.net [IPv6:2605:2700:0:5::4713:9cab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51954C061746; Wed, 8 Dec 2021 13:37:16 -0800 (PST) Received: from hatter.bewilderbeest.net (174-21-184-96.tukw.qwest.net [174.21.184.96]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: zev) by thorn.bewilderbeest.net (Postfix) with ESMTPSA id E6BC1500; Wed, 8 Dec 2021 13:37:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bewilderbeest.net; s=thorn; t=1638999436; bh=DFS4xFVoWu3eIZ8C+hKS8xqrLjmyqO7+PD3wjn4s/TA=; h=From:To:Cc:Subject:Date:From; b=DUihA1g+gL8KLIYS6nxLj3FiJTBi4UTbuhhU7fEGCmzbQV22O9zo24E9H0rryuQeH CmFZAIu30o3/oZtgAq9gEyfGbks4mKmXaXo+kY9WHBqhlNRUSYROOpqhdfPePOHyvD jP5YzfldCXJzmOrK5UPiN1tVmtLR5pOPGbzb6OZg= From: Zev Weiss To: linux-hwmon@vger.kernel.org Cc: Guenter Roeck , Jean Delvare , openbmc@lists.ozlabs.org, devicetree@vger.kernel.org, Rob Herring , Zev Weiss Subject: [PATCH v4 0/2] hwmon: (pmbus) Add Delta AHE-50DC fan control module driver Date: Wed, 8 Dec 2021 13:37:01 -0800 Message-Id: <20211208213703.2577-1-zev@bewilderbeest.net> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Hello, These patches add a hwmon pmbus driver for the integrated fan control module in the Delta AHE-50DC Open19 power shelf. I don't know of a datasheet or any proper documentation for it. It's a PMBus device, but supports a fairly limited set of commands. The ones it does support have deen deduced from a combination of an existing GPL driver in a code release from LinkedIn [0] and some manual experimentation with i2c-tools commands. In addition to some standard PMBus sensors (three temperature readings, four fan speeds, and a vin voltage), it also has a manufacturer-specific fourth temperature reading available, which is supported via a virtual second page (the device itself is not paged, but the driver remaps PMBUS_READ_TEMPERATURE_1 in page 1 to the manufacturer-specific TEMPERATURE_4). Thanks, Zev Weiss Changes since v3 [3]: - fixed header inclusion order - removed spurious select/depends Kconfig lines - added comment explaining PMBUS_NO_CAPABILITY - added command-filtering to read_word_data callback to avoid producing bogus sensor limits - updated commit message Changes since v2 [2]: - converted to pmbus driver Changes since v1 [1]: - fixed invalid name warning from __hwmon_device_register() [0] https://github.com/linkedin/o19-bmc-firmware/blob/master/meta-openbmc/meta-linkedin/meta-deltapower/recipes-kernel/fancontrol-mod/files/fancontrol.c [1] https://lore.kernel.org/linux-hwmon/20211206224419.15736-1-zev@bewilderbeest.net/ [2] https://lore.kernel.org/linux-hwmon/20211206230153.16891-1-zev@bewilderbeest.net/ [3] https://lore.kernel.org/linux-hwmon/20211207071521.543-1-zev@bewilderbeest.net/ Zev Weiss (2): hwmon: (pmbus) Add Delta AHE-50DC fan control module driver dt-bindings: add Delta AHE-50DC fan control module .../devicetree/bindings/trivial-devices.yaml | 2 + MAINTAINERS | 6 + drivers/hwmon/pmbus/Kconfig | 10 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/delta-ahe50dc-fan.c | 114 ++++++++++++++++++ 5 files changed, 133 insertions(+) create mode 100644 drivers/hwmon/pmbus/delta-ahe50dc-fan.c