From patchwork Fri Jul 12 12:43:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Priya Kakitapalli X-Patchwork-Id: 13731715 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3091316F848; Fri, 12 Jul 2024 12:44:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720788300; cv=none; b=FK/h4UWQQcNGDLcI//UAkU+qq5AmCTAXxKWwknxBK/Q12TQtk5ekBATzVU5AyTes5ppWhh2xcjJ4TGaU3X1KTHbiI4dyLX4B6uW1OKlss4PLR4Y96MmhdDymdmBdt0AfYj5Pgi8m2TTfklmUxWCzB6V2RlUQgtvq9LF8w1lZ28g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720788300; c=relaxed/simple; bh=XED/XmFhc1Ds7+nd2W8muR54svIrPQy95BDqvx3Nea4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=ptTIZBC6FcW04ayRB6X1F/npai8Vwh9A/qDAG1ioeylNhkUEEZn1S+VKQNHxbtKhh5FuIZ4VYuRltrOyG2rMeILSeBa6nCF/y3/+yPbRl2yzyGf3E8H3A24McKV9FRkqGDcq/e0E6WY3SHUeqLgZa2yxyhx/xm/TvsjHcPkcS+Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=QGyfSoVO; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="QGyfSoVO" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46C3LLht011628; Fri, 12 Jul 2024 12:44:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= IsGU/rjkxMDFyd56KUf32egz0v6vp7eWZC1Rr57iv5A=; b=QGyfSoVOx9qwO80O N6XjYg3faCum13aLReRJtIt9GNwMfenWX5VbClYQB2iwAvjsxT6st1A6xRtRaFk1 y1+fQ5uhlYWtdmHDc2bFpssqbtZorQOJ40V2WgGFm5EkGI1Spnspbk1EjurekFeV /LQc7AUC6li/sZgLAaMAUFE0zi/tnA97RlpmriVwbPgYAuezvO8A9DvtV0K1v4YT eeveGzMkc4Ngyl9p7UBzNtIB7WGts3h1Yw9VMHaRuURSbLFIKl6/W/o8Z0v1OOeC l0z4Lo4T9keaUnKejLUvNhnwCOb1OJqD/d2PNDUUlWcOkPLX44UUwAJUQdVh56g3 hl1D3w== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 406wgwy8yx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Jul 2024 12:44:40 +0000 (GMT) Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA05.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 46CCidal028031 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Jul 2024 12:44:39 GMT Received: from hu-skakitap-hyd.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Fri, 12 Jul 2024 05:44:32 -0700 From: Satya Priya Kakitapalli Date: Fri, 12 Jul 2024 18:13:30 +0530 Subject: [PATCH 3/5] thermal: qcom: Add support for MBG Temp monitor Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240712-mbg-tm-support-v1-3-7d78bec920ca@quicinc.com> References: <20240712-mbg-tm-support-v1-0-7d78bec920ca@quicinc.com> In-Reply-To: <20240712-mbg-tm-support-v1-0-7d78bec920ca@quicinc.com> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Amit Kucheria , "Thara Gopinath" , Bjorn Andersson , Konrad Dybcio CC: Kamal Wadhwa , Taniya Das , Jishnu Prakash , , , , , , Satya Priya Kakitapalli , Ajit Pandey , "Imran Shaik" , Jagadeesh Kona X-Mailer: b4 0.13.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: fIuBoHZpjo_oqHlzSkSitOBB-eFRpaJy X-Proofpoint-ORIG-GUID: fIuBoHZpjo_oqHlzSkSitOBB-eFRpaJy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-12_09,2024-07-11_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 mlxscore=0 adultscore=0 malwarescore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2407120086 Add driver for the MBG thermal monitoring device. It monitors the die temperature, and when there is a level 1 upper threshold violation, it receives an interrupt over spmi. The driver reads the fault status register and notifies thermal accordingly. Signed-off-by: Satya Priya Kakitapalli --- drivers/thermal/qcom/Kconfig | 11 ++ drivers/thermal/qcom/Makefile | 1 + drivers/thermal/qcom/qcom-spmi-mbg-tm.c | 269 ++++++++++++++++++++++++++++++++ 3 files changed, 281 insertions(+) diff --git a/drivers/thermal/qcom/Kconfig b/drivers/thermal/qcom/Kconfig index 2c7f3f9a26eb..46045094020c 100644 --- a/drivers/thermal/qcom/Kconfig +++ b/drivers/thermal/qcom/Kconfig @@ -21,6 +21,17 @@ config QCOM_SPMI_ADC_TM5 Thermal client sets threshold temperature for both warm and cool and gets updated when a threshold is reached. +config QCOM_SPMI_MBG_TM + tristate "Qualcomm Technologies, Inc. SPMI PMIC MBG Temperature monitor" + depends on OF && SPMI && IIO + select REGMAP_SPMI + help + This enables a thermal driver for the MBG thermal monitoring device. + It shows up in sysfs as a thermal sensor with two trip points. + It notifies the thermal framework when level 1 high threshold is + violated. The temperature reported by the thermal sensor reflects + the real time die temperature through ADC channel. + config QCOM_SPMI_TEMP_ALARM tristate "Qualcomm SPMI PMIC Temperature Alarm" depends on OF && SPMI && IIO diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile index 0fa2512042e7..bc18e08ee3e2 100644 --- a/drivers/thermal/qcom/Makefile +++ b/drivers/thermal/qcom/Makefile @@ -4,5 +4,6 @@ obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o qcom_tsens-y += tsens.o tsens-v2.o tsens-v1.o tsens-v0_1.o \ tsens-8960.o obj-$(CONFIG_QCOM_SPMI_ADC_TM5) += qcom-spmi-adc-tm5.o +obj-$(CONFIG_QCOM_SPMI_MBG_TM) += qcom-spmi-mbg-tm.o obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o obj-$(CONFIG_QCOM_LMH) += lmh.o diff --git a/drivers/thermal/qcom/qcom-spmi-mbg-tm.c b/drivers/thermal/qcom/qcom-spmi-mbg-tm.c new file mode 100644 index 000000000000..70964ea5a48d --- /dev/null +++ b/drivers/thermal/qcom/qcom-spmi-mbg-tm.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0-only +//Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../thermal_core.h" + +#define MBG_TEMP_MON_MM_MON2_FAULT_STATUS 0x50 + +#define MON_FAULT_STATUS_MASK GENMASK(7, 6) +#define MON_FAULT_STATUS_SHIFT 6 +#define MON2_LVL1_ERR 0x1 + +#define MON2_LVL1_UP_THRESH 0x59 + +#define MBG_TEMP_MON_MM_MON2_MISC_CFG 0x5f +#define UP_THRESH_EN BIT(1) + +#define STEP_MV 8 +#define MBG_DEFAULT_TEMP_MV 600 +#define MBG_TEMP_CONSTANT 1000 +#define MIN_TRIP_TEMP 25000 +#define MAX_SUPPORTED_TEMP 160000 + +struct mbg_tm_chip { + struct regmap *map; + struct device *dev; + struct thermal_zone_device *tz_dev; + struct mutex lock; + unsigned int base; + int irq; + int last_temp; + bool last_temp_set; + struct iio_channel *adc; +}; + +struct mbg_map_table { + int min_temp; + int vtemp0; + int tc; +}; + +static const struct mbg_map_table map_table[] = { + /* minT vtemp0 tc */ + { -60000, 4337, 1967 }, + { -40000, 4731, 1964 }, + { -20000, 5124, 1957 }, + { 0, 5515, 1949 }, + { 20000, 5905, 1940 }, + { 40000, 6293, 1930 }, + { 60000, 6679, 1921 }, + { 80000, 7064, 1910 }, + { 100000, 7446, 1896 }, + { 120000, 7825, 1878 }, + { 140000, 8201, 1859 }, +}; + +static int mbg_tm_read(struct mbg_tm_chip *chip, u16 addr, int *data) +{ + return regmap_read(chip->map, chip->base + addr, data); +} + +static int mbg_tm_write(struct mbg_tm_chip *chip, u16 addr, int data) +{ + return regmap_write(chip->map, chip->base + addr, data); +} + +static int mbg_tm_reg_update(struct mbg_tm_chip *chip, u16 addr, u8 mask, u8 val) +{ + return regmap_write_bits(chip->map, chip->base + addr, mask, val); +} + +static int mbg_tm_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct mbg_tm_chip *chip = thermal_zone_device_priv(tz); + int ret, milli_celsius; + + if (!temp) + return -EINVAL; + + if (chip->last_temp_set) { + pr_debug("last_temp: %d\n", chip->last_temp); + chip->last_temp_set = false; + *temp = chip->last_temp; + return 0; + } + + ret = iio_read_channel_processed(chip->adc, &milli_celsius); + if (ret < 0) { + dev_err(chip->dev, "failed to read iio channel %d\n", ret); + return ret; + } + + *temp = milli_celsius; + + return 0; +} + +static int temp_to_vtemp(int temp) +{ + + int idx, vtemp, tc = 0, t0 = 0, vtemp0 = 0; + + if (temp > MAX_SUPPORTED_TEMP) + temp = MAX_SUPPORTED_TEMP - MBG_TEMP_CONSTANT; + + for (idx = 0; idx < ARRAY_SIZE(map_table); idx++) + if (temp >= map_table[idx].min_temp && + temp < (map_table[idx].min_temp + 20000)) { + tc = map_table[idx].tc; + t0 = map_table[idx].min_temp; + vtemp0 = map_table[idx].vtemp0; + break; + } + + /* + * Formula to calculate vtemp(mV) from a given temp + * vtemp = (temp - minT) * tc + vtemp0 + * tc, t0 and vtemp0 values are mentioned in the map_table array. + */ + vtemp = ((temp - t0) * tc + vtemp0 * 100000) / 1000000; + + return abs(vtemp - MBG_DEFAULT_TEMP_MV) / STEP_MV; +} + +static int mbg_tm_set_trip_temp(struct thermal_zone_device *tz, int low_temp, + int temp) +{ + struct mbg_tm_chip *chip = thermal_zone_device_priv(tz); + int ret = 0, vtemp = 0; + + mutex_lock(&chip->lock); + + /* The HW has a limitation that the trip set must be above 25C */ + if (temp > MIN_TRIP_TEMP && temp < INT_MAX) { + mbg_tm_reg_update(chip, MBG_TEMP_MON_MM_MON2_MISC_CFG, + UP_THRESH_EN, UP_THRESH_EN); + vtemp = temp_to_vtemp(temp); + ret = mbg_tm_write(chip, MON2_LVL1_UP_THRESH, vtemp); + if (ret < 0) { + mutex_unlock(&chip->lock); + return ret; + } + } else { + dev_dbg(chip->dev, "Setting %d failed, set trip between 25C and INT_MAX\n", temp); + mbg_tm_reg_update(chip, MBG_TEMP_MON_MM_MON2_MISC_CFG, + UP_THRESH_EN, 0); + } + + mutex_unlock(&chip->lock); + + /* + * Configure the last_temp one degree higher, to ensure the + * violated temp is returned to thermal framework when it reads + * temperature for the first time after the violation happens. + * This is needed to account for the inaccuracy in the conversion + * formula used which leads to the thermal framework setting back + * the same thresholds in case the temperature it reads does not + * show violation. + */ + chip->last_temp = temp + MBG_TEMP_CONSTANT; + + return ret; +} + +static const struct thermal_zone_device_ops mbg_tm_ops = { + .get_temp = mbg_tm_get_temp, + .set_trips = mbg_tm_set_trip_temp, +}; + +static irqreturn_t mbg_tm_isr(int irq, void *data) +{ + struct mbg_tm_chip *chip = data; + int ret; + int val = 0; + + mutex_lock(&chip->lock); + + ret = mbg_tm_read(chip, MBG_TEMP_MON_MM_MON2_FAULT_STATUS, &val); + + mutex_unlock(&chip->lock); + + if (ret < 0) + return IRQ_HANDLED; + + val &= MON_FAULT_STATUS_MASK; + if ((val >> MON_FAULT_STATUS_SHIFT) & MON2_LVL1_ERR) { + chip->last_temp_set = true; + thermal_zone_device_update(chip->tz_dev, + THERMAL_TRIP_VIOLATED); + dev_dbg(chip->dev, "Notifying Thermal, fault status=%d\n", val); + } else { + dev_dbg(chip->dev, "Lvl 1 upper threshold not violated, ignoring interrupt\n"); + } + + return IRQ_HANDLED; +} + +static int mbg_tm_probe(struct platform_device *pdev) +{ + struct mbg_tm_chip *chip; + struct device_node *node = pdev->dev.of_node; + u32 res; + int ret = 0; + + chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->dev = &pdev->dev; + + mutex_init(&chip->lock); + + chip->map = dev_get_regmap(pdev->dev.parent, NULL); + if (!chip->map) + return -ENXIO; + + ret = of_property_read_u32(node, "reg", &res); + if (ret < 0) + return ret; + + chip->base = res; + + chip->irq = platform_get_irq(pdev, 0); + if (chip->irq < 0) + return chip->irq; + + chip->adc = devm_iio_channel_get(&pdev->dev, "thermal"); + if (IS_ERR(chip->adc)) + return PTR_ERR(chip->adc); + + chip->tz_dev = devm_thermal_of_zone_register(&pdev->dev, + 0, chip, &mbg_tm_ops); + if (IS_ERR(chip->tz_dev)) { + dev_err(&pdev->dev, "failed to register sensor\n"); + return PTR_ERR(chip->tz_dev); + } + + ret = devm_request_threaded_irq(&pdev->dev, chip->irq, NULL, + mbg_tm_isr, IRQF_ONESHOT, node->name, chip); + + return ret; +} + +static const struct of_device_id mbg_tm_match_table[] = { + { .compatible = "qcom,spmi-mbg-tm" }, + { } +}; +MODULE_DEVICE_TABLE(of, mbg_tm_match_table); + +static struct platform_driver mbg_tm_driver = { + .driver = { + .name = "qcom-spmi-mbg-tm", + .of_match_table = mbg_tm_match_table, + }, + .probe = mbg_tm_probe, +}; +module_platform_driver(mbg_tm_driver); + +MODULE_DESCRIPTION("PMIC MBG Temperature monitor driver"); +MODULE_LICENSE("GPL");