From patchwork Thu Dec 16 12:25:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair X-Patchwork-Id: 525753 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 C0F23C433EF for ; Thu, 16 Dec 2021 12:26:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236770AbhLPM0O (ORCPT ); Thu, 16 Dec 2021 07:26:14 -0500 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:44989 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236801AbhLPM0I (ORCPT ); Thu, 16 Dec 2021 07:26:08 -0500 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id 7C80F5805EC; Thu, 16 Dec 2021 07:26:07 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute6.internal (MEProxy); Thu, 16 Dec 2021 07:26:07 -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=byYZ5MvJCFlLl K5cmfT2zkFtFxLckB6GsY07XdYC0qc=; b=bcUfPCDJWmohMNXD/nXMn2nGoUlpf WOviKH6uq7bWX3tvwDfchxAh1my7b/yr4aynxwmsrPPT+E3Xa5PTko4bBRaGiIvU I4EaL6O1K7iqNOTJB10nR6aJrd+BqLPThxoimaP7eiVPaADsaFAqHDq0B93h+EVn m4bU4nsFrn/SVDmmxpJ2timIV9vjnn5KcK+l5F32Wlq2gycWU1gl3gt5xedYBkxn 3HyIqLsX/ASCF6W1MXaKFTz0cvNFybWjertNb6ImWX9nEHUi3bIBMVuFeEuLBbCb PQ3k193iwJiiR8NuAMXjqkU/MZEslTi+WKO6aqJ5HzkZ0ZrJbcM5Z3quA== 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=byYZ5MvJCFlLlK5cmfT2zkFtFxLckB6GsY07XdYC0qc=; b=VII134dx SCnrJ1Y7alvtp8EmqSLLkJOdPKs+KyKFa7LO2hZEROpLvamW/ZHJpqpelxJ7VwKB Y59jPejlU3ufNYb/GHnXZgl5Lzu+2l9WlqdbUjEoyHMwC9iiTw826/JrXtRVG+3R h36vrpuV+0nUGGFVfC5E53FLiDkMIeXopvumJWgyXLwfogQKHKQ4ehAqFVvtnPkn d93sd5sFg1T2qXNB+sLuzesYWLp7GSsNDkgpSXvko7AnJu0fj2MX7fgCUXOa7MYm cAAJ/SJMsQoLDhltR1JTE+yaz/j0T7je9gPEVP/yfA1WrGDqr86+v957JN49ilFz KY2kN6lT+l7/wQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrleeggdegudcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeetlhhishhtrghirhcuhfhrrghntghishcuoegrlhhishhtrghi rhesrghlihhsthgrihhrvdefrdhmvgeqnecuggftrfgrthhtvghrnhepheffjeetteetke ffhfdvgefhgeevvddvueejheehfeevfedufeegiedtheeujeelnecuffhomhgrihhnpehr vghmrghrkhgrsghlvgdrtghomhenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmh epmhgrihhlfhhrohhmpegrlhhishhtrghirhesrghlihhsthgrihhrvdefrdhmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 16 Dec 2021 07:26:01 -0500 (EST) From: Alistair Francis To: kernel@pengutronix.de, lgirdwood@gmail.com, robh+dt@kernel.org, lee.jones@linaro.org, broonie@kernel.org Cc: linux-imx@nxp.com, devicetree@vger.kernel.org, s.hauer@pengutronix.de, linux-arm-kernel@lists.infradead.org, andreas@kemnade.info, linux-hwmon@vger.kernel.org, alistair23@gmail.com, amitk@kernel.org, shawnguo@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, rui.zhang@intel.com, Alistair Francis Subject: [PATCH v17 5/8] hwmon: sy7636a: Add temperature driver for sy7636a Date: Thu, 16 Dec 2021 22:25:22 +1000 Message-Id: <20211216122525.136139-6-alistair@alistair23.me> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211216122525.136139-1-alistair@alistair23.me> References: <20211216122525.136139-1-alistair@alistair23.me> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.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 | 26 +++++++ drivers/hwmon/Kconfig | 9 +++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sy7636a-hwmon.c | 106 ++++++++++++++++++++++++++ 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..5612079397d5 --- /dev/null +++ b/Documentation/hwmon/sy7636a-hwmon.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +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..6dd9c2a0f0e0 --- /dev/null +++ b/drivers/hwmon/sy7636a-hwmon.c @@ -0,0 +1,106 @@ +// 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) + 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");