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[24.246.30.234]) by smtp.gmail.com with ESMTPSA id fb9-20020a05622a480900b004279315b3besm7710684qtb.0.2023.12.27.16.34.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Dec 2023 16:34:55 -0800 (PST) From: Ivor Wanders To: Jean Delvare , Guenter Roeck , Jonathan Corbet , Maximilian Luz , Ivor Wanders , Hans de Goede , Mark Gross Cc: linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [PATCH v2 1/2] hwmon: add fan speed monitoring driver for Surface devices Date: Wed, 27 Dec 2023 19:34:43 -0500 Message-Id: <20231228003444.5580-2-ivor@iwanders.net> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231228003444.5580-1-ivor@iwanders.net> References: <20231228003444.5580-1-ivor@iwanders.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1786483819509942530 X-GMAIL-MSGID: 1786483819509942530 Adds a driver that provides read only access to the fan speed for Microsoft Surface Pro devices. The fan speed is always regulated by the EC and cannot be influenced directly. Signed-off-by: Ivor Wanders Link: https://github.com/linux-surface/kernel/pull/144 --- Changes in v2: - Removed all sysfs attributes except fan1_input. Simplified code and updated documentation accordingly. --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/surface_fan.rst | 25 +++++++ MAINTAINERS | 8 +++ drivers/hwmon/Kconfig | 13 ++++ drivers/hwmon/Makefile | 1 + drivers/hwmon/surface_fan.c | 105 ++++++++++++++++++++++++++++ 6 files changed, 153 insertions(+) create mode 100644 Documentation/hwmon/surface_fan.rst create mode 100644 drivers/hwmon/surface_fan.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 042e1cf95..4dfb3b9bd 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -202,6 +202,7 @@ Hardware Monitoring Kernel Drivers smsc47m1 sparx5-temp stpddc60 + surface_fan sy7636a-hwmon tc654 tc74 diff --git a/Documentation/hwmon/surface_fan.rst b/Documentation/hwmon/surface_fan.rst new file mode 100644 index 000000000..07942574c --- /dev/null +++ b/Documentation/hwmon/surface_fan.rst @@ -0,0 +1,25 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver surface_fan +========================= + +Supported Devices: + + * Microsoft Surface Pro 9 + +Author: Ivor Wanders + +Description +----------- + +This provides monitoring of the fan found in some Microsoft Surface Pro devices, +like the Surface Pro 9. The fan is always controlled by the onboard controller. + +Sysfs interface +--------------- + +======================= ======= ========================================= +Name Perm Description +======================= ======= ========================================= +``fan1_input`` RO Current fan speed in RPM. +======================= ======= ========================================= diff --git a/MAINTAINERS b/MAINTAINERS index 439cf523b..8e7870af3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14078,6 +14078,14 @@ F: Documentation/driver-api/surface_aggregator/clients/dtx.rst F: drivers/platform/surface/surface_dtx.c F: include/uapi/linux/surface_aggregator/dtx.h +MICROSOFT SURFACE SENSOR FAN DRIVER +M: Maximilian Luz +M: Ivor Wanders +L: linux-hwmon@vger.kernel.org +S: Maintained +F: Documentation/hwmon/surface_fan.rst +F: drivers/hwmon/surface_fan.c + MICROSOFT SURFACE GPE LID SUPPORT DRIVER M: Maximilian Luz L: platform-driver-x86@vger.kernel.org diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 307477b8a..4b4d999af 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1965,6 +1965,19 @@ config SENSORS_SMM665 This driver can also be built as a module. If so, the module will be called smm665. +config SENSORS_SURFACE_FAN + tristate "Surface Fan Driver" + depends on SURFACE_AGGREGATOR + help + Driver that provides monitoring of the fan on Surface Pro devices that + have a fan, like the Surface Pro 9. + + This makes the fan's current speed accessible through the hwmon + system. It does not provide control over the fan, the firmware is + responsible for that, this driver merely provides monitoring. + + Select M or Y here, if you want to be able to read the fan's speed. + config SENSORS_ADC128D818 tristate "Texas Instruments ADC128D818" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 3f4b0fda0..5ae214c06 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -198,6 +198,7 @@ obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o obj-$(CONFIG_SENSORS_STTS751) += stts751.o +obj-$(CONFIG_SENSORS_SURFACE_FAN)+= surface_fan.o obj-$(CONFIG_SENSORS_SY7636A) += sy7636a-hwmon.o obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o obj-$(CONFIG_SENSORS_TC74) += tc74.o diff --git a/drivers/hwmon/surface_fan.c b/drivers/hwmon/surface_fan.c new file mode 100644 index 000000000..0160a585c --- /dev/null +++ b/drivers/hwmon/surface_fan.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Surface Fan driver for Surface System Aggregator Module. It provides access + * to the fan's rpm through the hwmon system. + * + * Copyright (C) 2023 Ivor Wanders + */ + +#include +#include +#include +#include +#include +#include + +// SSAM +SSAM_DEFINE_SYNC_REQUEST_CL_R(__ssam_fan_rpm_get, __le16, { + .target_category = SSAM_SSH_TC_FAN, + .command_id = 0x01, +}); + +// hwmon +umode_t surface_fan_hwmon_is_visible(const void *drvdata, + enum hwmon_sensor_types type, u32 attr, + int channel) +{ + if (type != hwmon_fan) + return 0; + + if (attr != hwmon_fan_input) + return 0; + + return 0444; +} + +static int surface_fan_hwmon_read(struct device *dev, + enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + struct ssam_device *sdev = dev_get_drvdata(dev); + __le16 value; + + if (type != hwmon_fan) + return -EOPNOTSUPP; + + if (attr != hwmon_fan_input) + return -EOPNOTSUPP; + + if (__ssam_fan_rpm_get(sdev, &value)) + return -EIO; + + *val = le16_to_cpu(value); + + return 0; +} + +static const struct hwmon_channel_info *const surface_fan_info[] = { + HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT), + NULL +}; + +static const struct hwmon_ops surface_fan_hwmon_ops = { + .is_visible = surface_fan_hwmon_is_visible, + .read = surface_fan_hwmon_read, +}; + +static const struct hwmon_chip_info surface_fan_chip_info = { + .ops = &surface_fan_hwmon_ops, + .info = surface_fan_info, +}; + +static int surface_fan_probe(struct ssam_device *sdev) +{ + struct device *hdev; + + hdev = devm_hwmon_device_register_with_info(&sdev->dev, "fan", sdev, + &surface_fan_chip_info, + NULL); + if (IS_ERR(hdev)) + return PTR_ERR(hdev); + + ssam_device_set_drvdata(sdev, sdev); + + return 0; +} + +static const struct ssam_device_id ssam_fan_match[] = { + { SSAM_SDEV(FAN, SAM, 0x01, 0x01) }, + {}, +}; +MODULE_DEVICE_TABLE(ssam, ssam_fan_match); + +static struct ssam_device_driver surface_fan = { + .probe = surface_fan_probe, + .match_table = ssam_fan_match, + .driver = { + .name = "surface_fan", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; +module_ssam_device_driver(surface_fan); + +MODULE_AUTHOR("Ivor Wanders "); +MODULE_DESCRIPTION("Fan Driver for Surface System Aggregator Module"); +MODULE_LICENSE("GPL"); From patchwork Thu Dec 28 00:34:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivor Wanders X-Patchwork-Id: 183589 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:6f82:b0:100:9c79:88ff with SMTP id tb2csp1737748dyb; Wed, 27 Dec 2023 16:35:45 -0800 (PST) X-Google-Smtp-Source: AGHT+IGe4IOYMVxC/HfxPXjMiC+58ycg2lYgbIbiEgYDJzxPNMiZVd+tmT/YR4Z2DI63XoQ33vB8 X-Received: by 2002:a05:6870:224d:b0:1fb:75a:de75 with SMTP id j13-20020a056870224d00b001fb075ade75mr10993255oaf.99.1703723745748; Wed, 27 Dec 2023 16:35:45 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1703723745; cv=none; d=google.com; s=arc-20160816; b=u5exKgFrAHOCoNTZyXqZMbxobCKsaMj4uNIrKRJYA/bWVhZXDjyY9segBt/6obs4mF 4jx91c9Fy3v0IJ7lnnV+IDAoVY58Amk0s5QHYuCaO2ymq8zbFwmOEMH4tjUj/4sQyGpW LwSuOFyN3HGPBSFXXuYxsZeHgmrXmkabPPKzNUD6kei29JooMMExa6LPVlij8Ltb1NwL IrNCgTEl2T9NqtjcMj/LcDx0bOimajG2xFZ1zP9rYvgeddeH8v6qE8QGT+RGawyhTH9Y DOwJKld93U4VmIvnNTZo9ff6BDljHWrErAL48NrRZVsPnrOpoUhFQ4UhZrJuuIhiq1H4 0DXQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-unsubscribe:list-subscribe:list-id:precedence:references :in-reply-to:message-id:date:subject:cc:to:from:dkim-signature; bh=jy4/hAbZIHHKviv5DRs0q6iojZt8AME5ln1+pcgK9ak=; fh=tmP3r8kdHnjto9t/Q2hyg0WZlGuk2h+t0yEFfDzt3ZM=; b=HuSdkg//Ko7Yr3kzkuEF44568/CToYqFlit0Dv5HQOPdraYdtpd1bKxqDJMXPtJ6sN PCp6l8ZXBtvUoU7mLbeQiYs079CLhLGnBWU4B9DU23Mlccd8Chb5QspONm/jsncKVn33 nHn5G67rfADcOAjqkjzvy9y7EzetH7ShIE1OmfcVViDi+XIKPmOq/lgNV+j0fZCVQCpz JK+MS9RCf6VGgPA7lhb8KwEyLabkUW+A69GnaCw191BwbN82Bn2xZP69p84/XKIqlKst miqoP13JsI0RoLjcc9I1xDpUQDdwL9zJ2izqXbQ2j9Cvvhh3h5N5THmBvA4vlcQwEXHg NiXQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@iwanders.net header.s=google header.b=I9TZNyYe; spf=pass (google.com: domain of linux-kernel+bounces-12326-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) smtp.mailfrom="linux-kernel+bounces-12326-ouuuleilei=gmail.com@vger.kernel.org" Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org. 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[24.246.30.234]) by smtp.gmail.com with ESMTPSA id fb9-20020a05622a480900b004279315b3besm7710684qtb.0.2023.12.27.16.34.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Dec 2023 16:34:57 -0800 (PST) From: Ivor Wanders To: Jean Delvare , Guenter Roeck , Jonathan Corbet , Maximilian Luz , Ivor Wanders , Hans de Goede , Mark Gross Cc: linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [PATCH v2 2/2] platform/surface: aggregator_registry: add entry for fan speed Date: Wed, 27 Dec 2023 19:34:44 -0500 Message-Id: <20231228003444.5580-3-ivor@iwanders.net> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231228003444.5580-1-ivor@iwanders.net> References: <20231228003444.5580-1-ivor@iwanders.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1786483830332394848 X-GMAIL-MSGID: 1786483830332394848 Add an entry for the fan speed function. Add this new entry to the Surface Pro 9 group. Signed-off-by: Ivor Wanders Link: https://github.com/linux-surface/kernel/pull/144 Reviewed-by: Maximilian Luz --- Changes in v2: - No changes in this patch. --- drivers/platform/surface/surface_aggregator_registry.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c index 530db4db7..b0db25886 100644 --- a/drivers/platform/surface/surface_aggregator_registry.c +++ b/drivers/platform/surface/surface_aggregator_registry.c @@ -74,6 +74,12 @@ static const struct software_node ssam_node_tmp_pprof = { .parent = &ssam_node_root, }; +/* Fan speed function. */ +static const struct software_node ssam_node_fan_speed = { + .name = "ssam:01:05:01:01:01", + .parent = &ssam_node_root, +}; + /* Tablet-mode switch via KIP subsystem. */ static const struct software_node ssam_node_kip_tablet_switch = { .name = "ssam:01:0e:01:00:01", @@ -319,6 +325,7 @@ static const struct software_node *ssam_node_group_sp9[] = { &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, + &ssam_node_fan_speed, &ssam_node_pos_tablet_switch, &ssam_node_hid_kip_keyboard, &ssam_node_hid_kip_penstash,