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=-11.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 692DDC43387 for ; Thu, 3 Jan 2019 08:56:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 297A020883 for ; Thu, 3 Jan 2019 08:56:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="XtPMTN70" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730442AbfACI4J (ORCPT ); Thu, 3 Jan 2019 03:56:09 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:33886 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730398AbfACIz5 (ORCPT ); Thu, 3 Jan 2019 03:55:57 -0500 Received: by mail-pg1-f193.google.com with SMTP id j10so15744193pga.1 for ; Thu, 03 Jan 2019 00:55:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=m4GYe5BpuCzl66iZjcA33AeUfezru5psM9UkhsJsXCg=; b=XtPMTN70hQeNn1bW5fb176J2wkClrz8pQPqh7v4nsXDMvbsrMT7LXfyvYjF9aJRrjf onhqpJayoV/LyHKmmBxzVo4eRbNXDAscp9DBxm+IHeQyOx/XjCA7FjIeEWCibpymrRVj 6jeLRucXvOT97uSzuSYeZaBRhgOU8APSfT8wg= 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; bh=m4GYe5BpuCzl66iZjcA33AeUfezru5psM9UkhsJsXCg=; b=XZtHmGcBreCV0aCXCw20imbrEE8/5qFlNY9zxA4iW742Zh7zsNgC1n1Ps1mcuMKwF7 74geiOBgM5RqOmCd+IUXBO1JMq4VVKiGTxnj0xMSbAGfqVKLHi5sE+VKvGs7onzPfK2O SUDjMRprsgRYIc8AZTYtOiffy/mal1lE2DBz6d0TK8bW83AhJUHhkyvMhoHPspcDqqo9 6+xcROzLOCCqsBBLePEYBiorkh5oOKmBCinrR36XtFnmmoXvYQM8pxsOAlfWpeIwWEkT 34/H1kcGCc0trhZ86+gBYv5pamgEre9aQFNcfNW3lr/jNGJJ/PjtMdMwNTi8fjn8pD8o IaVA== X-Gm-Message-State: AJcUukcYI4m1o3+jxyjKkV3VBnEXJpixA3xRmH+J38ckXSxiLeP/sX6X xyc+qfRRBqKCZyfpX7t3uvmLRg== X-Google-Smtp-Source: ALg8bN4xHH+b2cmWb0SrM5kfpQZ/K1L1iLuJLY3anz14AyRy//YC9rgNZ9LqhttkYUppqxqP51tfDw== X-Received: by 2002:a63:680a:: with SMTP id d10mr16435562pgc.396.1546505755901; Thu, 03 Jan 2019 00:55:55 -0800 (PST) Received: from mannams-OptiPlex-7010.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id s190sm78189727pfb.103.2019.01.03.00.55.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 03 Jan 2019 00:55:55 -0800 (PST) From: Srinath Mannam To: daniel.lezcano@linaro.org, Zhang Rui , Eduardo Valentin , Rob Herring , Mark Rutland Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Pramod Kumar , Srinath Mannam Subject: [PATCH v6 2/3] thermal: broadcom: Add Stingray thermal driver Date: Thu, 3 Jan 2019 14:25:33 +0530 Message-Id: <1546505734-24527-3-git-send-email-srinath.mannam@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1546505734-24527-1-git-send-email-srinath.mannam@broadcom.com> References: <1546505734-24527-1-git-send-email-srinath.mannam@broadcom.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pramod Kumar Stingray SoC has six temperature sensor and those are configured, controlled and accessed to read temperature and update in DDR memory using m0 firmware. All six sensors has been given 4 bytes of memory in DDR to write temperature in millivolts. This thermal driver read temperature values from DDR because no direct access to sensors. Like this all temparature sensors are monitored and trips at critical temperature. If driver can't handle thermal runaways because of any unknown reason, then firmware in m0 Processor will handle. Signed-off-by: Pramod Kumar Signed-off-by: Srinath Mannam Reviewed-by: Ray Jui Reviewed-by: Scott Branden Reviewed-by: Vikram Prakash --- drivers/thermal/Kconfig | 3 +- drivers/thermal/broadcom/Kconfig | 9 +++ drivers/thermal/broadcom/Makefile | 1 + drivers/thermal/broadcom/sr-thermal.c | 122 ++++++++++++++++++++++++++++++++++ 4 files changed, 134 insertions(+), 1 deletion(-) create mode 100644 drivers/thermal/broadcom/sr-thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 5422523..60e884e 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -416,7 +416,8 @@ config MTK_THERMAL controller present in Mediatek SoCs menu "Broadcom thermal drivers" -depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || COMPILE_TEST +depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCM_IPROC || \ + COMPILE_TEST source "drivers/thermal/broadcom/Kconfig" endmenu diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig index c106a15..dc9a9bd 100644 --- a/drivers/thermal/broadcom/Kconfig +++ b/drivers/thermal/broadcom/Kconfig @@ -22,3 +22,12 @@ config BCM_NS_THERMAL BCM4708, BCM4709, BCM5301x, BCM95852X, etc). It contains DMU (Device Management Unit) block with a thermal sensor that allows checking CPU temperature. + +config BCM_SR_THERMAL + tristate "Stingray thermal driver" + depends on ARCH_BCM_IPROC || COMPILE_TEST + default ARCH_BCM_IPROC + help + Support for the Stingray family of SoCs. Its different blocks like + iHost, CRMU and NITRO has thermal sensor that allows checking its + temperature. diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile index fae10ec..79df69e 100644 --- a/drivers/thermal/broadcom/Makefile +++ b/drivers/thermal/broadcom/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_BCM2835_THERMAL) += bcm2835_thermal.o obj-$(CONFIG_BRCMSTB_THERMAL) += brcmstb_thermal.o obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o +obj-$(CONFIG_BCM_SR_THERMAL) += sr-thermal.o diff --git a/drivers/thermal/broadcom/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c new file mode 100644 index 0000000..fcb0cc2 --- /dev/null +++ b/drivers/thermal/broadcom/sr-thermal.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Broadcom + */ + +#include +#include +#include +#include +#include + +/* + * In stingray thermal IO memory, + * Total Number of available TMONs MASK is at offset 0 + * temperature registers BASE is at 4 byte offset. + * Each TMON temperature register size is 4. + */ +#define SR_TMON_TEMP_BASE(id) ((id) * 0x4) + +#define SR_TMON_MAX_LIST 6 + +struct sr_tmon { + struct thermal_zone_device *tz; + unsigned int crit_temp; + unsigned int tmon_id; + struct sr_thermal *priv; +}; + +struct sr_thermal { + void __iomem *regs; + unsigned int max_crit_temp; + struct sr_tmon tmon[SR_TMON_MAX_LIST]; +}; + +static int sr_get_temp(void *data, int *temp) +{ + struct sr_tmon *tmon = data; + struct sr_thermal *sr_thermal = tmon->priv; + + *temp = readl(sr_thermal->regs + SR_TMON_TEMP_BASE(tmon->tmon_id)); + + return 0; +} + +static const struct thermal_zone_of_device_ops sr_tz_ops = { + .get_temp = sr_get_temp, +}; + +static int sr_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sr_thermal *sr_thermal; + struct sr_tmon *tmon; + struct resource *res; + uint32_t sr_tmon_list = 0; + unsigned int i; + int ret; + + sr_thermal = devm_kzalloc(dev, sizeof(*sr_thermal), GFP_KERNEL); + if (!sr_thermal) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start, + resource_size(res), + MEMREMAP_WB); + if (IS_ERR(sr_thermal->regs)) { + dev_err(dev, "failed to get io address\n"); + return PTR_ERR(sr_thermal->regs); + } + + ret = device_property_read_u32(dev, "brcm,tmon-mask", &sr_tmon_list); + if (ret) + return ret; + + tmon = sr_thermal->tmon; + for (i = 0; i < SR_TMON_MAX_LIST; i++, tmon++) { + + if (!(sr_tmon_list & BIT(i))) + continue; + + /* Flush temperature registers */ + writel(0, sr_thermal->regs + SR_TMON_TEMP_BASE(i)); + tmon->tmon_id = i; + tmon->priv = sr_thermal; + tmon->tz = devm_thermal_zone_of_sensor_register(dev, i, tmon, + &sr_tz_ops); + if (IS_ERR(tmon->tz)) + return PTR_ERR(tmon->tz); + + dev_dbg(dev, "thermal sensor %d registered\n", i); + } + platform_set_drvdata(pdev, sr_thermal); + + return 0; +} + +static const struct of_device_id sr_thermal_of_match[] = { + { .compatible = "brcm,sr-thermal", }, + {}, +}; +MODULE_DEVICE_TABLE(of, sr_thermal_of_match); + +static const struct acpi_device_id sr_thermal_acpi_ids[] = { + { .id = "BRCM0500" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(acpi, sr_thermal_acpi_ids); + +static struct platform_driver sr_thermal_driver = { + .probe = sr_thermal_probe, + .driver = { + .name = "sr-thermal", + .of_match_table = sr_thermal_of_match, + .acpi_match_table = ACPI_PTR(sr_thermal_acpi_ids), + }, +}; +module_platform_driver(sr_thermal_driver); + +MODULE_AUTHOR("Pramod Kumar "); +MODULE_DESCRIPTION("Stingray thermal driver"); +MODULE_LICENSE("GPL v2"); -- 2.7.4