From patchwork Tue Aug 3 08:44:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair X-Patchwork-Id: 491114 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=-18.8 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, USER_AGENT_GIT autolearn=ham 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 8CEF3C432BE for ; Tue, 3 Aug 2021 08:46:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 76BF860555 for ; Tue, 3 Aug 2021 08:46:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234709AbhHCIqR (ORCPT ); Tue, 3 Aug 2021 04:46:17 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:60155 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234656AbhHCIqP (ORCPT ); Tue, 3 Aug 2021 04:46:15 -0400 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 72D1E5C00CF; Tue, 3 Aug 2021 04:46:04 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Tue, 03 Aug 2021 04:46:04 -0400 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=fm1; bh=24W58pwLC8JPC lSnlXShder4NRAbcQwJUTo8WYRwEGI=; b=NxCGNlEklPwbvbP9/+UimID+G+84G nStUWjWYlExqkzOOjuPerFKfbB2POaeb02SzaQ5tXIAPrtvKSzBFD1PCrmvRR1+z ofyJ0ZpW+JSF4ae04LXMZK3SSm8WAfMKLoPmYFOjksUHYVlXi4Pe6CvSb7KopdNK mF33rJTkEUO3d5EnHeK3TRIZKg4T1MZ+L449SwKckcOlweAcSoo+6q7lEYbMdFHk wdtj/5EFF0K4JtuQRWmrUn1gZvNlfZWtUJkktv0tTmx6+Wev3yUwAvZ7vBnoTOr6 nDk8Auw2z3S0+fxSMYm0SHRWetj47f99PlchRqnROsx0n0JIxdMSziEQw== 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= fm3; bh=24W58pwLC8JPClSnlXShder4NRAbcQwJUTo8WYRwEGI=; b=BwGXBmgf sVBZCLlmnPWEaMsfGQJuo93yaLedPmFq5a4WySz4oKcUX6HxMTVddQg/PB5dF18X s+G13QKqO5LqYH36LdYr2AZQ8wiRWIve9ntFX7VyIbaCQyBEjQWyUI8N23zURfeV Aog3f3yRZA0l0wOuoYLsO9H9ZBiA9y0sJ5MbC59BzCzRIeRIkzet5cTJA9oRd03j JWWmqeJ057njGK8DNzFutbLcnnm58/akztuJ5ZX8EuLSDHYm6mPzyrhB57+TFh3p rGkp+0tqi3Xile2cZrzSiTZYFTtSqk+kSLD7zwKs217w1DTC96/nCn8M98NODo11 IdSsSZZgpEHTKQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrieeggddthecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeetlhhishhtrghirhcuhfhrrghntghishcuoegrlhhishhtrghi rhesrghlihhsthgrihhrvdefrdhmvgeqnecuggftrfgrthhtvghrnhepheffjeetteetke ffhfdvgefhgeevvddvueejheehfeevfedufeegiedtheeujeelnecuffhomhgrihhnpehr vghmrghrkhgrsghlvgdrtghomhenucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmh epmhgrihhlfhhrohhmpegrlhhishhtrghirhesrghlihhsthgrihhrvdefrdhmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 3 Aug 2021 04:46:00 -0400 (EDT) From: Alistair Francis To: lee.jones@linaro.org, robh+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, linux-imx@nxp.com, kernel@pengutronix.de Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, alistair23@gmail.com, Alistair Francis Subject: [PATCH v8 04/11] hwmon: sy7636a: Add temperature driver for sy7636a Date: Tue, 3 Aug 2021 18:44:51 +1000 Message-Id: <20210803084456.198-4-alistair@alistair23.me> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210803084456.198-1-alistair@alistair23.me> References: <20210803084456.198-1-alistair@alistair23.me> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This is a multi-function device to interface with the sy7636a EPD PMIC chip from Silergy. Signed-off-by: Alistair Francis --- arch/arm/configs/imx_v6_v7_defconfig | 1 + drivers/hwmon/Kconfig | 10 ++++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sy7636a-hwmon.c | 77 ++++++++++++++++++++++++++++ 4 files changed, 89 insertions(+) create mode 100644 drivers/hwmon/sy7636a-hwmon.c diff --git a/arch/arm/configs/imx_v6_v7_defconfig b/arch/arm/configs/imx_v6_v7_defconfig index 477dac1edc75..ef8c6dca1277 100644 --- a/arch/arm/configs/imx_v6_v7_defconfig +++ b/arch/arm/configs/imx_v6_v7_defconfig @@ -229,6 +229,7 @@ CONFIG_RN5T618_POWER=m CONFIG_SENSORS_MC13783_ADC=y CONFIG_SENSORS_GPIO_FAN=y CONFIG_SENSORS_IIO_HWMON=y +CONFIG_SENSORS_SY7636A=y CONFIG_THERMAL_STATISTICS=y CONFIG_THERMAL_WRITABLE_TRIPS=y CONFIG_CPU_THERMAL=y diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index e3675377bc5d..6cae12de59cd 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1631,6 +1631,16 @@ 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" + depends on I2C + 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 d712c61c1f5e..8b2e09e25b24 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -180,6 +180,7 @@ 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..f5c6b5dca81b --- /dev/null +++ b/drivers/hwmon/sy7636a-hwmon.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Functions to access SY3686A power management chip temperature + * + * Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig + * Alistair Francis + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static ssize_t show_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned int reg_val; + int ret; + struct sy7636a *data = dev_get_drvdata(dev); + + ret = regmap_read(data->regmap, + SY7636A_REG_TERMISTOR_READOUT, ®_val); + if (ret) + return ret; + + return snprintf(buf, PAGE_SIZE, "%d\n", reg_val); +} + +static SENSOR_DEVICE_ATTR(temp0, 0444, show_temp, NULL, 0); + +static struct attribute *sy7636a_attrs[] = { + &sensor_dev_attr_temp0.dev_attr.attr, + NULL +}; + +ATTRIBUTE_GROUPS(sy7636a); + +static int sy7636a_sensor_probe(struct platform_device *pdev) +{ + struct sy7636a *sy7636a = dev_get_drvdata(pdev->dev.parent); + struct device *hwmon_dev; + int err; + + if (!sy7636a) + return -EPROBE_DEFER; + + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, + "sy7636a_temperature", sy7636a, sy7636a_groups); + + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + dev_err(&pdev->dev, "Unable to register hwmon device, returned %d", 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");