From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 0BCF1C54E4A for ; Tue, 12 May 2020 13:27:16 +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 C4BDA206F5 for ; Tue, 12 May 2020 13:27:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="W2UeuqZS"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="P000BKk6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4BDA206F5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GxxpOgL9Da2KRk5rnaKwJAaUp9t09aA3p0Qsvak/8JI=; b=W2UeuqZSJx6yXE S9BZ0kgpk1Xe3Fu+dZ5kflZKpNZNRdsIaovt3BifjHCXGVN4S3zduJK62WHrYLyNpRfB57UqNlb+W 6sQNs5wauodEKue2AXm8M6CCv8rwiy9L5pP23DfJrU+1m5EuNHu3MDjSOvjz60P/pf6ywA5tUZi6X nzVcPA3AQ2GVcvIJr9/AD0YUf6//xl0pNkKtBSmgnsUQ+R0TqCFbJIR4xF/nvm2KM6nNCHZVign4C zWOUcA8w+DrXFJvNwd9x8SV/jTD00CG8DRUxmIsTx2IBrhMGUuOrrpAp9hyAi8AaKNTCe+JhUy9er EJZ1UnVqXi8OGNSoaVkA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYUwC-0002JI-8X; Tue, 12 May 2020 13:27:12 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYUvP-0001WQ-I5 for linux-arm-kernel@lists.infradead.org; Tue, 12 May 2020 13:26:25 +0000 Received: by mail-wr1-x442.google.com with SMTP id l17so1820228wrr.4 for ; Tue, 12 May 2020 06:26:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AT7F3lHkleJYJf6ArphPWyOpM56JVM5mHZcAwbWvMm4=; b=P000BKk6kRS6mG4RDIUXyBsNyG/eZJ7AQO5s0MGLc9hZqyfuiPOjkEgCUQeQlwCNfy t6Z76E48EStqfJcHbnHe6tz3Utgo5shjjcnpO/SHkfyY4vridZiMlOTrsS1RAZZrGNZp 0B1YMyWuTVN4SKkzRaM4hCXScc08y1KDSPKqsA5vGcEAl4vMtQsEmIQDtFujzYt9KmoZ gbnVilFHiuszaPdiUjb+dw69N5JowJREEUy/Q5PWVid0GpPDEsq0qZn9XPIaa9OCnuFE HVVtV3d+IZzYqKGNdgoQZUO1jj3T7wklGo5tIteFSWPbStk2VFDQVPeEFwm4HEXcztIc fM+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=AT7F3lHkleJYJf6ArphPWyOpM56JVM5mHZcAwbWvMm4=; b=Ne1xOa2OIxp0vNDXHurGPfdMDJrjQ2+rnl8LiiD83d+a15rbNCCCxp6cfHK0a3Gse8 CIw3iKlKL4trzF0MIFKgc6OL/IhLYihGdSgRHivvmkaeid8MIwxObaMjsvLh53UkSdBr 074uJvZVJHCGrbuLQBCunvH1e+625WTV7ZaKrSdaeTY+439oTtUOBnGaIeSd8qi8H9yF LRy2WCieBnSPRANmnR9QPh3QMGkex1CCUZagnniQff0fZcBJi5TEbT/6Y+3nGRaHp4PU SqtnxnZa2blfEenlL8tr86XRQzChzulPII/3OfCwVpMYQ5VOUlrnKm0mcTIWzXb3Em4n I4SQ== X-Gm-Message-State: AGi0PuZNJ+uDRpbuaYmf+Szp6ZwYgpHpBSlfjotGpFvQIb5QqpJXyObU Gu2xVBVDxU3a/n4hpGNUpRySMg== X-Google-Smtp-Source: APiQypJAIR/wl5WZ+wRSFmBEv8f8mUMSkzbG4Uh2oabJsHfJxmHHcdTv7uE1/2v38jv8ReO8P2yPPw== X-Received: by 2002:adf:dcc8:: with SMTP id x8mr10712073wrm.404.1589289982214; Tue, 12 May 2020 06:26:22 -0700 (PDT) Received: from localhost.localdomain ([2a01:e35:2ec0:82b0:4460:3fd3:382:4a71]) by smtp.gmail.com with ESMTPSA id g15sm14441844wro.71.2020.05.12.06.26.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2020 06:26:21 -0700 (PDT) From: Neil Armstrong To: srinivas.kandagatla@linaro.org, rui.zhang@intel.com, daniel.lezcano@linaro.org, amit.kucheria@verdurent.com Subject: [PATCH v2 3/6] thermal: add support for the MCU controlled FAN on Khadas boards Date: Tue, 12 May 2020 15:26:10 +0200 Message-Id: <20200512132613.31507-4-narmstrong@baylibre.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20200512132613.31507-1-narmstrong@baylibre.com> References: <20200512132613.31507-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200512_062623_605789_8834CA6E X-CRM114-Status: GOOD ( 18.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Neil Armstrong Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The new Khadas VIM2 and VIM3 boards controls the cooling fan via the on-board microcontroller. This implements the FAN control as thermal devices and as cell of the Khadas MCU MFD driver. Signed-off-by: Neil Armstrong --- drivers/thermal/Kconfig | 10 ++ drivers/thermal/Makefile | 1 + drivers/thermal/khadas_mcu_fan.c | 174 +++++++++++++++++++++++++++++++ 3 files changed, 185 insertions(+) create mode 100644 drivers/thermal/khadas_mcu_fan.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 91af271e9bb0..72b3960cc5ac 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -490,4 +490,14 @@ config SPRD_THERMAL help Support for the Spreadtrum thermal sensor driver in the Linux thermal framework. + +config KHADAS_MCU_FAN_THERMAL + tristate "Khadas MCU controller FAN cooling support" + depends on OF || COMPILE_TEST + select MFD_CORE + select REGMAP + help + If you say yes here you get support for the FAN controlled + by the Microcontroller found on the Khadas VIM boards. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 8c8ed7b79915..460428c2122c 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -60,3 +60,4 @@ obj-$(CONFIG_ZX2967_THERMAL) += zx2967_thermal.o obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o +obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o diff --git a/drivers/thermal/khadas_mcu_fan.c b/drivers/thermal/khadas_mcu_fan.c new file mode 100644 index 000000000000..044d4aba8be2 --- /dev/null +++ b/drivers/thermal/khadas_mcu_fan.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Khadas MCU Controlled FAN driver + * + * Copyright (C) 2020 BayLibre SAS + * Author(s): Neil Armstrong + */ + +#include +#include +#include +#include +#include +#include +#include + +#define MAX_LEVEL 3 + +struct khadas_mcu_fan_ctx { + struct khadas_mcu *mcu; + unsigned int level; + struct thermal_cooling_device *cdev; +}; + +static int khadas_mcu_fan_set_level(struct khadas_mcu_fan_ctx *ctx, + unsigned int level) +{ + int ret; + + ret = regmap_write(ctx->mcu->map, KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG, + level); + if (ret) + return ret; + + ctx->level = level; + + return 0; +} + +static int khadas_mcu_fan_get_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct khadas_mcu_fan_ctx *ctx = cdev->devdata; + + if (!ctx) + return -EINVAL; + + *state = MAX_LEVEL; + + return 0; +} + +static int khadas_mcu_fan_get_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct khadas_mcu_fan_ctx *ctx = cdev->devdata; + + if (!ctx) + return -EINVAL; + + *state = ctx->level; + + return 0; +} + +static int +khadas_mcu_fan_set_cur_state(struct thermal_cooling_device *cdev, + unsigned long state) +{ + struct khadas_mcu_fan_ctx *ctx = cdev->devdata; + + if (!ctx || (state > MAX_LEVEL)) + return -EINVAL; + + if (state == ctx->level) + return 0; + + return khadas_mcu_fan_set_level(ctx, state); +} + +static const struct thermal_cooling_device_ops khadas_mcu_fan_cooling_ops = { + .get_max_state = khadas_mcu_fan_get_max_state, + .get_cur_state = khadas_mcu_fan_get_cur_state, + .set_cur_state = khadas_mcu_fan_set_cur_state, +}; + +static int khadas_mcu_fan_probe(struct platform_device *pdev) +{ + struct khadas_mcu *mcu = dev_get_drvdata(pdev->dev.parent); + struct thermal_cooling_device *cdev; + struct device *dev = &pdev->dev; + struct khadas_mcu_fan_ctx *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + ctx->mcu = mcu; + platform_set_drvdata(pdev, ctx); + + cdev = devm_thermal_of_cooling_device_register(dev->parent, + dev->parent->of_node, "khadas-mcu-fan", ctx, + &khadas_mcu_fan_cooling_ops); + if (IS_ERR(cdev)) { + ret = PTR_ERR(cdev); + dev_err(dev, + "Failed to register khadas-mcu-fan as cooling device: %d\n", + ret); + return ret; + } + ctx->cdev = cdev; + thermal_cdev_update(cdev); + + return 0; +} + +static int khadas_mcu_fan_disable(struct device *dev) +{ + struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev); + unsigned int level_save = ctx->level; + int ret; + + ret = khadas_mcu_fan_set_level(ctx, 0); + if (ret) + return ret; + + ctx->level = level_save; + + return 0; +} + +static void khadas_mcu_fan_shutdown(struct platform_device *pdev) +{ + khadas_mcu_fan_disable(&pdev->dev); +} + +#ifdef CONFIG_PM_SLEEP +static int khadas_mcu_fan_suspend(struct device *dev) +{ + return khadas_mcu_fan_disable(dev); +} + +static int khadas_mcu_fan_resume(struct device *dev) +{ + struct khadas_mcu_fan_ctx *ctx = dev_get_drvdata(dev); + + return khadas_mcu_fan_set_level(ctx, ctx->level); +} +#endif + +static SIMPLE_DEV_PM_OPS(khadas_mcu_fan_pm, khadas_mcu_fan_suspend, + khadas_mcu_fan_resume); + +static const struct platform_device_id khadas_mcu_fan_id_table[] = { + { .name = "khadas-mcu-fan-ctrl", }, + {}, +}; +MODULE_DEVICE_TABLE(platform, khadas_mcu_fan_id_table); + +static struct platform_driver khadas_mcu_fan_driver = { + .probe = khadas_mcu_fan_probe, + .shutdown = khadas_mcu_fan_shutdown, + .driver = { + .name = "khadas-mcu-fan-ctrl", + .pm = &khadas_mcu_fan_pm, + }, + .id_table = khadas_mcu_fan_id_table, +}; + +module_platform_driver(khadas_mcu_fan_driver); + +MODULE_AUTHOR("Neil Armstrong "); +MODULE_DESCRIPTION("Khadas MCU FAN driver"); +MODULE_LICENSE("GPL"); -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel