From patchwork Wed Nov 10 12:29:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair Francis X-Patchwork-Id: 12692162 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B868FC433F5 for ; Wed, 10 Nov 2021 12:32:58 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7D5BE6102A for ; Wed, 10 Nov 2021 12:32:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7D5BE6102A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=alistair23.me Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=cah1/awmcyX+s/Nx3aftdfJSfY3u4j1y3p0/owgAia8=; b=G9eNNnEqkV3WIU vkU3jjqJxsUj2bD+C5MGW0j6kz08f1/a7wzlhBFafHJFJMGNmjyp5NKsj9ghGEvtj6O5C/UvqViOi GgXWqFRXVDnO9edU5Fb7UpHiq4sA+gJczALWT5n6z6D9uCob8CX3OGzqLBiVfExFmBgH/Ny7vndVU zLGPqL6jAlAK8CpmDwMI6wVgSOVnoJEyRyBYXWZi4J0tHtLC7sYut7l0SuhJzIyTRCMtaFVPn8mB5 ARuUESBzyoU59YrClp4K2qy0BTponDyCip2yUQfEmi6xXFLb2uJBmKZiVb7r7w/m9B6X4/xzeFIbe 2nWExwGKlBiHoZYDjwOA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mkml2-005PNK-VE; Wed, 10 Nov 2021 12:31:17 +0000 Received: from new1-smtp.messagingengine.com ([66.111.4.221]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mkmkI-005P4R-5U for linux-arm-kernel@lists.infradead.org; Wed, 10 Nov 2021 12:30:32 +0000 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailnew.nyi.internal (Postfix) with ESMTP id 71BE7580867; Wed, 10 Nov 2021 07:30:29 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute4.internal (MEProxy); Wed, 10 Nov 2021 07:30:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alistair23.me; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm2; bh=iy8l2/k4fz+dN nL088tkgbgbfdBttUJTxzjw7rleDEo=; b=xWQsnlnZlxznm6vfuRohPft92XRR7 MJbn8fNihM0yk1f1QhJVxL5h0n0tZWsGNJNxDXn7dRDQxbRf4Yh/1vm7aj6DwwsC C767MtdWkH+mOmQZze5xf6sqEtwJZ+OhL8RxCTOoG1FGX/7MaQvZUBF/vXNyu+6R P0y3XSrwFlKNTOtbKZYNlV/jWc8f0cmr4MzHGlai0oNTjDguZ/KYY4dqMMRtBc67 MoMudJ8cTRaTIfsJc21xxthboAyg/tG8JyO3semo1DcCarhdmW/zJ2F+yeKp3rYe FSIspqUSqMrZgMr6gU196zLDYhRnt+OKovi6aOhPaTLBGIrn4Sf8r//QQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=iy8l2/k4fz+dNnL088tkgbgbfdBttUJTxzjw7rleDEo=; b=gvyEv7Ag ClQMe0xF7wNC8THXLcyh95Ec2JG+ivAES0rBps7AcFlVd0D/xnOo9onUwIRBaRsc yBsWA8D7cb1FTCycVxXUCJxbNblbUG6sSHzZsn7qDyBgx6o5PAN3zg5tThMTScEy oZYd+pLhW3hWHorNkk7oAxpgugNjvrgovV36xN/zwOm83V4zuGLyzwt/vosD1DFq /6kgX+kEfEKjoB+SePSd9ZRJ/TTyzVIgvoQhPBj4GcOHEeUuQvdHQ5VZVQAiuaRz VgeMB4xGSvIEq6f7Z1XnBCN1xvKtGXTSZtCnbyFHswl+pIZlZ+g9szdDfw1zBd7Z 9X4CSuo7iCRPkQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrudejgdegtdcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeetlhhishhtrghirhcuhfhrrghntghishcuoegrlhhishhtrghi rhesrghlihhsthgrihhrvdefrdhmvgeqnecuggftrfgrthhtvghrnhepheffjeetteetke ffhfdvgefhgeevvddvueejheehfeevfedufeegiedtheeujeelnecuffhomhgrihhnpehr vghmrghrkhgrsghlvgdrtghomhenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmh epmhgrihhlfhhrohhmpegrlhhishhtrghirhesrghlihhsthgrihhrvdefrdhmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 10 Nov 2021 07:30:23 -0500 (EST) From: Alistair Francis To: lee.jones@linaro.org, broonie@kernel.org, kernel@pengutronix.de, lgirdwood@gmail.com, robh+dt@kernel.org Cc: linux-kernel@vger.kernel.org, rui.zhang@intel.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, s.hauer@pengutronix.de, linux-hwmon@vger.kernel.org, amitk@kernel.org, linux-pm@vger.kernel.org, linux-imx@nxp.com, alistair23@gmail.com, andreas@kemnade.info, shawnguo@kernel.org, Alistair Francis Subject: [PATCH v15 5/8] hwmon: sy7636a: Add temperature driver for sy7636a Date: Wed, 10 Nov 2021 22:29:45 +1000 Message-Id: <20211110122948.188683-6-alistair@alistair23.me> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211110122948.188683-1-alistair@alistair23.me> References: <20211110122948.188683-1-alistair@alistair23.me> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211110_043030_317100_66D41B8C X-CRM114-Status: GOOD ( 19.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is a multi-function device to interface with the sy7636a EPD PMIC chip from Silergy. Signed-off-by: Alistair Francis --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/sy7636a-hwmon.rst | 24 ++++++ drivers/hwmon/Kconfig | 9 +++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sy7636a-hwmon.c | 108 ++++++++++++++++++++++++++ 5 files changed, 143 insertions(+) create mode 100644 Documentation/hwmon/sy7636a-hwmon.rst create mode 100644 drivers/hwmon/sy7636a-hwmon.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 7046bf1870d9..a887308850cd 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -180,6 +180,7 @@ Hardware Monitoring Kernel Drivers smsc47m1 sparx5-temp stpddc60 + sy7636a-hwmon tc654 tc74 thmc50 diff --git a/Documentation/hwmon/sy7636a-hwmon.rst b/Documentation/hwmon/sy7636a-hwmon.rst new file mode 100644 index 000000000000..6b3e36d028dd --- /dev/null +++ b/Documentation/hwmon/sy7636a-hwmon.rst @@ -0,0 +1,24 @@ +Kernel driver sy7636a-hwmon +========================= + +Supported chips: + + * Silergy SY7636A PMIC + + +Description +----------- + +This driver adds hardware temperature reading support for +the Silergy SY7636A PMIC. + +The following sensors are supported + + * Temperature + - SoC on-die temperature in milli-degree C + +sysfs-Interface +--------------- + +temp0_input + - SoC on-die temperature (milli-degree C) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 64bd3dfba2c4..3139a286c35a 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1662,6 +1662,15 @@ config SENSORS_SIS5595 This driver can also be built as a module. If so, the module will be called sis5595. +config SENSORS_SY7636A + tristate "Silergy SY7636A" + help + If you say yes here you get support for the thermistor readout of + the Silergy SY7636A PMIC. + + This driver can also be built as a module. If so, the module + will be called sy7636a-hwmon. + config SENSORS_DME1737 tristate "SMSC DME1737, SCH311x and compatibles" depends on I2C && !PPC diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index baee6a8d4dd1..8f8da52098d1 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -182,6 +182,7 @@ obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o obj-$(CONFIG_SENSORS_STTS751) += stts751.o +obj-$(CONFIG_SENSORS_SY7636A) += sy7636a-hwmon.o obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o obj-$(CONFIG_SENSORS_TC74) += tc74.o obj-$(CONFIG_SENSORS_THMC50) += thmc50.o diff --git a/drivers/hwmon/sy7636a-hwmon.c b/drivers/hwmon/sy7636a-hwmon.c new file mode 100644 index 000000000000..84ceaae3a404 --- /dev/null +++ b/drivers/hwmon/sy7636a-hwmon.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Functions to access SY3686A power management chip temperature + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig + * Alistair Francis + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +static int sy7636a_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *temp) +{ + struct regmap *regmap = dev_get_drvdata(dev); + int ret, reg_val; + + ret = regmap_read(regmap, + SY7636A_REG_TERMISTOR_READOUT, ®_val); + if (ret) + return ret; + + *temp = reg_val * 1000; + + return 0; +} + +static umode_t sy7636a_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + if (type != hwmon_temp) + return 0; + + if (attr != hwmon_temp_input) + return 0; + + return 0444; +} + +static const struct hwmon_ops sy7636a_hwmon_ops = { + .is_visible = sy7636a_is_visible, + .read = sy7636a_read, +}; + +static const struct hwmon_channel_info *sy7636a_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), + NULL +}; + +static const struct hwmon_chip_info sy7636a_chip_info = { + .ops = &sy7636a_hwmon_ops, + .info = sy7636a_info, +}; + +static int sy7636a_sensor_probe(struct platform_device *pdev) +{ + struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL); + struct regulator *regulator; + struct device *hwmon_dev; + int err; + + if (!regmap) + return -EPROBE_DEFER; + + regulator = devm_regulator_get(&pdev->dev, "vcom"); + if (IS_ERR(regulator)) { + return PTR_ERR(regulator); + } + + err = regulator_enable(regulator); + if (err) { + regulator_put(regulator); + return err; + } + + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, + "sy7636a_temperature", regmap, &sy7636a_chip_info, NULL); + + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + dev_err(&pdev->dev, "Unable to register hwmon device, returned %d\n", err); + return err; + } + + return 0; +} + +static struct platform_driver sy7636a_sensor_driver = { + .probe = sy7636a_sensor_probe, + .driver = { + .name = "sy7636a-temperature", + }, +}; +module_platform_driver(sy7636a_sensor_driver); + +MODULE_DESCRIPTION("SY7636A sensor driver"); +MODULE_LICENSE("GPL");