From patchwork Wed Aug 18 15:44:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair X-Patchwork-Id: 499901 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=-17.7 required=3.0 tests=BAYES_00, DATE_IN_PAST_12_24, 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 25C11C4338F for ; Thu, 19 Aug 2021 11:16:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 099CF60E90 for ; Thu, 19 Aug 2021 11:16:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238550AbhHSLQs (ORCPT ); Thu, 19 Aug 2021 07:16:48 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:57183 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238465AbhHSLQp (ORCPT ); Thu, 19 Aug 2021 07:16:45 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id 001A55C0076; Thu, 19 Aug 2021 07:16:08 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute4.internal (MEProxy); Thu, 19 Aug 2021 07:16:09 -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=pyVtUnZYzGrcH 1g1RkGLXUcs/0mV92qZW3HWmcKlct4=; b=HeS/Jp8PsFo6dXD0Iv+NeaX/aYqy3 tNlHMO66L2KVZvIRTnCZoMtieio5LGyk+HXP9vhjZ0/e9EoOLyydgoC51y1jENud 3/55GOu8deRsM18TvNjYfS+wZeOV6t9PMyNefy/CGu7WF3EahRpFcTYvPz2nMH8/ 0+XvQk5syPiSYaLMbMlNh3wl5upJ1e2nYhHY5hMq/0Qs6zW3xNQ1Qlp6haX00BJ5 kLvvb+yQyswRbXKCJtnYpbwiP4+tvIImUcTy+jkS+swP7Kx3qq4ZL4+kektnX5rT 2wJAJfdlpcRRbuUA/EyUMY32M+on8pcgBq1lGagO+2njBbxMr4gpDIgzg== 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=pyVtUnZYzGrcH1g1RkGLXUcs/0mV92qZW3HWmcKlct4=; b=V1No3on0 tbkDFYCbCyo/vKR207JcIG5k8dbvP/Ae4seaYrVQJEBK4m72xGQ9hdFoSROwnSaG kZrgOTEp7zzGrdeifedxOcSGPnSKRVqMwJSKCxmhXfNeWqyDySLv6OtvubtQx/hH JgyY3dbGGfmwjSiU4rKirx/MBd2fQvcRrY145/tsRBvHVy6xvzVAgTSyBiYfQ01E vpf1tcRQyj36Xczuxa4uS3yO77BiVWW2V6iNzjxaSo6oOo07BnRLi8ltfNY+d9EI Sg0Plf+/GtphOb7zdYw2dbJWCN+qka3ZC0M1sag3mgMO8uByr8pi+9WpGss9pquB j3qK6nUmig+/sw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrleejgdefiecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeetlhhishhtrghirhcuhfhrrghntghishcuoegrlhhishhtrghi rhesrghlihhsthgrihhrvdefrdhmvgeqnecuggftrfgrthhtvghrnhepheffjeetteetke ffhfdvgefhgeevvddvueejheehfeevfedufeegiedtheeujeelnecuffhomhgrihhnpehr vghmrghrkhgrsghlvgdrtghomhenucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmh epmhgrihhlfhhrohhmpegrlhhishhtrghirhesrghlihhsthgrihhrvdefrdhmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 19 Aug 2021 07:16:05 -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 v11 05/10] thermal: sy7636a: Add thermal driver for sy7636a Date: Thu, 19 Aug 2021 01:44:44 +1000 Message-Id: <20210818154449.1037-6-alistair@alistair23.me> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210818154449.1037-1-alistair@alistair23.me> References: <20210818154449.1037-1-alistair@alistair23.me> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add thermal driver to enable kernel based polling and shutdown of device for temperatures out of spec Signed-off-by: Alistair Francis --- drivers/thermal/Kconfig | 6 ++ drivers/thermal/Makefile | 1 + drivers/thermal/sy7636a_thermal.c | 94 +++++++++++++++++++++++++++++++ 3 files changed, 101 insertions(+) create mode 100644 drivers/thermal/sy7636a_thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index d7f44deab5b1..6ee0e7de1b37 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -450,6 +450,12 @@ depends on (ARCH_STI || ARCH_STM32) && OF source "drivers/thermal/st/Kconfig" endmenu +config SY7636A_THERMAL + tristate "SY7636A thermal management" + help + Enable the sy7636a thermal driver, which supports the + temperature sensor embedded in Silabs SY7636A IC. + source "drivers/thermal/tegra/Kconfig" config GENERIC_ADC_THERMAL diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 82fc3e616e54..2e1aca8a0a09 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_DA9062_THERMAL) += da9062-thermal.o obj-y += intel/ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ obj-y += st/ +obj-$(CONFIG_SY7636A_THERMAL) += sy7636a_thermal.o obj-$(CONFIG_QCOM_TSENS) += qcom/ obj-y += tegra/ obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o diff --git a/drivers/thermal/sy7636a_thermal.c b/drivers/thermal/sy7636a_thermal.c new file mode 100644 index 000000000000..9e58305ca3ce --- /dev/null +++ b/drivers/thermal/sy7636a_thermal.c @@ -0,0 +1,94 @@ +// 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 + +static int sy7636a_get_temp(void *arg, int *res) +{ + unsigned int mode_ctr; + int ret, reg_val; + struct regmap *regmap = arg; + bool isVoltageActive; + + ret = regmap_read(regmap, + SY7636A_REG_OPERATION_MODE_CRL, &mode_ctr); + if (ret) + return ret; + + isVoltageActive = mode_ctr & SY7636A_OPERATION_MODE_CRL_ONOFF; + + /* If operation mode isn't set to control, then let's set it. */ + if (!isVoltageActive) { + ret = regmap_write(regmap, + SY7636A_REG_OPERATION_MODE_CRL, + mode_ctr | SY7636A_OPERATION_MODE_CRL_ONOFF); + if (ret) + return ret; + } + + ret = regmap_read(regmap, + SY7636A_REG_TERMISTOR_READOUT, ®_val); + if (ret) + return ret; + + /* Restore the operation mode if it wasn't set */ + if (!isVoltageActive) { + ret = regmap_write(regmap, + SY7636A_REG_OPERATION_MODE_CRL, + mode_ctr); + if (ret) + return ret; + } + + *res = reg_val * 1000; + + return ret; +} + +static const struct thermal_zone_of_device_ops ops = { + .get_temp = sy7636a_get_temp, +}; + +static int sy7636a_thermal_probe(struct platform_device *pdev) +{ + struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL); + struct thermal_zone_device *thermal_zone_dev; + + thermal_zone_dev = devm_thermal_zone_of_sensor_register( + pdev->dev.parent, + 0, + regmap, + &ops); + + return PTR_ERR_OR_ZERO(thermal_zone_dev); +} + +static const struct platform_device_id sy7636a_thermal_id_table[] = { + { "sy7636a-thermal", }, + { } +}; +MODULE_DEVICE_TABLE(platform, sy7636a_thermal_id_table); + +static struct platform_driver sy7636a_thermal_driver = { + .driver = { + .name = "sy7636a-thermal", + }, + .probe = sy7636a_thermal_probe, + .id_table = sy7636a_thermal_id_table, +}; +module_platform_driver(sy7636a_thermal_driver); + +MODULE_AUTHOR("Lars Ivar Miljeteig "); +MODULE_DESCRIPTION("SY7636A thermal driver"); +MODULE_LICENSE("GPL v2");