From patchwork Sat Mar 18 15:56:32 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= X-Patchwork-Id: 9632313 X-Patchwork-Delegate: eduardo.valentin@ti.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0DE32602D6 for ; Sat, 18 Mar 2017 20:22:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E81BE28334 for ; Sat, 18 Mar 2017 20:22:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8F7A28358; Sat, 18 Mar 2017 20:22:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 16A8928334 for ; Sat, 18 Mar 2017 20:22:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751133AbdCRUWo (ORCPT ); Sat, 18 Mar 2017 16:22:44 -0400 Received: from mail-lf0-f65.google.com ([209.85.215.65]:36066 "EHLO mail-lf0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751023AbdCRUWo (ORCPT ); Sat, 18 Mar 2017 16:22:44 -0400 Received: by mail-lf0-f65.google.com with SMTP id g70so7565514lfh.3 for ; Sat, 18 Mar 2017 13:22:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iKTY3rVgJq7JDj9sMGStT9quZzepRNp1Oqc1I4bfxSY=; b=E8Mejmketqncmh5+OYHd6PdR5PY0Ptjn3PQXsjxNFxKz5KGmwo7qUmNNMa+cUODdjm dhoOhEULMO0CIzhDgbQDkOCotJSML2VpfbTf6+NWmQQCDjHbb9ZRsYiKrzPg9sNT6q3z EzBACglYmXk49hFB3oW7JBTWZWb4dpVUcQk5a0c13qklo5hvU7b0/NeI+s90coanKMVO +ZaNt63hWQ1kvY+NQ5XnVyJFO84u03yqL4ArQGNJ0nswx04RDiJiuvhsNQqMcs6LYEJG aMAoURLPFGH1t0WB2txKFOpjYX2jcKoKHiJxDMs8jgHBIIsIIquN+2aji6saAZS6UddR TnVA== 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=iKTY3rVgJq7JDj9sMGStT9quZzepRNp1Oqc1I4bfxSY=; b=K6n/2fHH9qHcDOq3dCUjFFhH2DC7FV2p4Spjx9TfqNbmk0HHsjQbxI4Phev2SoJwyT p8/BIo89uVm7DKw+6dSccno9H4ienWx3o891K4xyRdSAGNqv9aZKPg70wqpp3BE+jU5K OkWMqs2lYoyHdBc5SgWUA660MIpJtdu3fTlr7AYx1qsbuUOV/PIe2eN6iwNiP4YI0ik0 9QQ6APEnaBFxvpXGYaWnZO4n0S+3sDOp18qbuq2G+YvrdG6g/ZxbMigitfO3ztedlHev QrTCtubqtW5rOVfhBj1MdULbJpHY4psNsrFRolmyrNom5WoWP4noK6MqVG2vQbrlf6by rkIQ== X-Gm-Message-State: AFeK/H0JEc6Kn4HvmiTXQo6qCDzh94A0/nyjyIOOqR+T+PjnsLgUizDtFUIHVDWlDNvUWg== X-Received: by 10.25.92.25 with SMTP id q25mr5587549lfb.121.1489852659706; Sat, 18 Mar 2017 08:57:39 -0700 (PDT) Received: from linux-samsung.lan (ip-194-187-74-233.konfederacka.maverick.com.pl. [194.187.74.233]) by smtp.gmail.com with ESMTPSA id 187sm2043527ljf.32.2017.03.18.08.57.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 18 Mar 2017 08:57:39 -0700 (PDT) From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= To: Zhang Rui , Eduardo Valentin Cc: Rob Herring , Mark Rutland , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Subject: [PATCH 2/2] thermal: broadcom: add Northstar thermal driver Date: Sat, 18 Mar 2017 16:56:32 +0100 Message-Id: <20170318155632.18099-2-zajec5@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170318155632.18099-1-zajec5@gmail.com> References: <20170318155632.18099-1-zajec5@gmail.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Rafał Miłecki Northstar is a SoC family commonly used in home routers. This commit adds a driver for checking CPU temperature. Signed-off-by: Rafał Miłecki --- drivers/thermal/Kconfig | 5 ++ drivers/thermal/Makefile | 1 + drivers/thermal/broadcom/Kconfig | 7 +++ drivers/thermal/broadcom/Makefile | 1 + drivers/thermal/broadcom/ns-thermal.c | 93 +++++++++++++++++++++++++++++++++++ 5 files changed, 107 insertions(+) create mode 100644 drivers/thermal/broadcom/Kconfig create mode 100644 drivers/thermal/broadcom/Makefile create mode 100644 drivers/thermal/broadcom/ns-thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 776b34396144..008e173ec825 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -392,6 +392,11 @@ config MTK_THERMAL Enable this option if you want to have support for thermal management controller present in Mediatek SoCs +menu "Broadcom thermal drivers" +depends on ARCH_BCM || COMPILE_TEST +source "drivers/thermal/broadcom/Kconfig" +endmenu + menu "Texas Instruments thermal drivers" depends on ARCH_HAS_BANDGAP || COMPILE_TEST depends on HAS_IOMEM diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 7adae2029355..549d81b6363c 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -27,6 +27,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o # platform thermal drivers +obj-y += broadcom/ obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig new file mode 100644 index 000000000000..08457a461794 --- /dev/null +++ b/drivers/thermal/broadcom/Kconfig @@ -0,0 +1,7 @@ +config BCM_NS_THERMAL + tristate "Northstar thermal driver" + depends on ARCH_BCM_5301X || COMPILE_TEST + help + Northstar's DMU (Device Management Unit) block contains a thermal + sensor that allows checking CPU temperature. This driver provides + support for it. diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile new file mode 100644 index 000000000000..059df9a0ed69 --- /dev/null +++ b/drivers/thermal/broadcom/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o diff --git a/drivers/thermal/broadcom/ns-thermal.c b/drivers/thermal/broadcom/ns-thermal.c new file mode 100644 index 000000000000..1ec710febc55 --- /dev/null +++ b/drivers/thermal/broadcom/ns-thermal.c @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2017 Rafał Miłecki + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include + +#define PVTMON_CONTROL0 0x00 +#define PVTMON_STATUS 0x08 + +struct ns_thermal { + void __iomem *pvtmon; +}; + +static int ns_thermal_get_temp(void *data, int *temp) +{ + struct ns_thermal *ns_thermal = data; + u32 val; + + val = readl(ns_thermal->pvtmon + PVTMON_STATUS); + *temp = 418000 - (val * 556); + + return 0; +} + +const struct thermal_zone_of_device_ops ns_thermal_ops = { + .get_temp = ns_thermal_get_temp, +}; + +static int ns_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ns_thermal *ns_thermal; + struct thermal_zone_device *tzd; + u32 val; + + ns_thermal = devm_kzalloc(dev, sizeof(*ns_thermal), GFP_KERNEL); + if (!ns_thermal) + return -ENOMEM; + + ns_thermal->pvtmon = of_iomap(dev_of_node(dev), 0); + if (WARN_ON(!ns_thermal->pvtmon)) + return -ENOENT; + + val = readl(ns_thermal->pvtmon + PVTMON_CONTROL0); + if (val & 0xf) + writel(val & ~0xf, ns_thermal->pvtmon + PVTMON_CONTROL0); + + tzd = devm_thermal_zone_of_sensor_register(dev, 0, ns_thermal, + &ns_thermal_ops); + if (IS_ERR(tzd)) { + iounmap(ns_thermal->pvtmon); + return PTR_ERR(tzd); + } + + platform_set_drvdata(pdev, ns_thermal); + + return 0; +} + +static int ns_thermal_remove(struct platform_device *pdev) +{ + struct ns_thermal *ns_thermal = platform_get_drvdata(pdev); + + iounmap(ns_thermal->pvtmon); + + return 0; +} + +static const struct of_device_id ns_thermal_of_match[] = { + { .compatible = "brcm,ns-thermal", }, + {}, +}; +MODULE_DEVICE_TABLE(of, ns_thermal_of_match); + +static struct platform_driver ns_thermal_driver = { + .probe = ns_thermal_probe, + .remove = ns_thermal_remove, + .driver = { + .name = "ns-thermal", + .of_match_table = ns_thermal_of_match, + }, +}; +module_platform_driver(ns_thermal_driver); + +MODULE_DESCRIPTION("Northstar thermal driver"); +MODULE_LICENSE("GPL v2");