Changes in Makefile

dbb3fc0f - platform/chrome: cros_ec_typec: Displayport support

Fri, 13 Dec 2024 23:35:47 +0000

platform/chrome: cros_ec_typec: Displayport supportAdd support for entering and exiting displayport alt-mode on systemsusing AP driven alt-mode.Signed-off-by: Abhishek Pandit-Subedi Link: https://lore.kernel.org/r/20241213153543.v5.6.I142fc0c09df58689b98f0cebf1c5e48b9d4fa800@changeidSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/platform/chrome/Makefile

3fc361af - platform/chrome: Introduce device tree hardware prober

Wed, 06 Nov 2024 09:33:33 +0000

platform/chrome: Introduce device tree hardware proberSome devices are designed and manufactured with some components havingmultiple drop-in replacement options. These components are oftenconnected to the mainboard via ribbon cables, having the same signalsand pin assignments across all options. These may include the displaypanel and touchscreen on laptops and tablets, and the trackpad onlaptops. Sometimes which component option is used in a particular devicecan be detected by some firmware provided identifier, other times thatinformation is not available, and the kernel has to try to probe eachdevice.This change attempts to make the "probe each device" case cleaner. Thecurrent approach is to have all options added and enabled in the devicetree. The kernel would then bind each device and run each driver's probefunction. This works, but has been broken before due to the introductionof asynchronous probing, causing multiple instances requesting "shared"resources, such as pinmuxes, GPIO pins, interrupt lines, at the sametime, with only one instance succeeding. Work arounds for these includemoving the pinmux to the parent I2C controller, using GPIO hogs orpinmux settings to keep the GPIO pins in some fixed configuration, andrequesting the interrupt line very late. Such configurations can be seenon the MT8183 Krane Chromebook tablets, and the Qualcomm sc8280xp-basedLenovo Thinkpad 13S.Instead of this delicate dance between drivers and device tree quirks,this change introduces a simple I2C component prober. For any givenclass of devices on the same I2C bus, it will go through all of them,doing a simple I2C read transfer and see which one of them responds.It will then enable the device that responds.This requires some minor modifications in the existing device tree.The status for all the device nodes for the component options must beset to "fail-needs-probe". This makes it clear that some mechanism isneeded to enable one of them, and also prevents the prober and devicedrivers running at the same time.Signed-off-by: Chen-Yu Tsai Acked-by: Tzung-Bi Shih Reviewed-by: Douglas Anderson Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Wolfram Sang List of files: /linux-6.15/drivers/platform/chrome/Makefile

466f70fb - platform/chrome: kunit: make EC protocol tests independent

Tue, 03 Oct 2023 08:05:15 +0000

platform/chrome: kunit: make EC protocol tests independentRemove CONFIG_CROS_KUNIT and common code concept for ChromeOS Kunit butmake it bundle to ChromeOS EC protocol tests.Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20231003080515.4011374-1-tzungbi@kernel.orgSigned-off-by: Tzung-Bi Shih List of files: /linux-6.15/drivers/platform/chrome/Makefile

493e699b - platform/chrome: cros_ec_typec: Add initial VDM support

Wed, 28 Dec 2022 00:45:11 +0000

platform/chrome: cros_ec_typec: Add initial VDM supportAdd ops to support USB PD VDM (Vendor Defined Message) from the portdriver. This enables the port driver to interface with alternate modedrivers and communicate with connected peripherals.The initial support just contains an implementation of the EnterMode command.Cc: Heikki Krogerus Signed-off-by: Prashant Malani [pmalani: Fixed trivial conflict in Makefile]Reviewed-by: Benson Leung Acked-by: Heikki Krogerus Link: https://lore.kernel.org/r/20221228004648.793339-9-pmalani@chromium.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

e5eea6a3 - platform/chrome: cros_ec_typec: Alter module name with hyphens

Wed, 28 Dec 2022 00:45:10 +0000

platform/chrome: cros_ec_typec: Alter module name with hyphensChange the Type-C module name from cros_ec_typec to cros-ec-typec. Thisallows us to include more files in the same module (rather than relyingon the file name cros_ec_typec to also be the module name).Signed-off-by: Prashant Malani [pmalani: Fixed trivial conflict in Makefile]Reviewed-by: Benson Leung Acked-by: Heikki Krogerus Link: https://lore.kernel.org/r/20221228004648.793339-8-pmalani@chromium.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

04a8bdd1 - platform/chrome: cros_ec_uart: Add transport layer

Tue, 27 Dec 2022 19:32:22 +0000

platform/chrome: cros_ec_uart: Add transport layerThis patch does following:1. Adds a new cros-ec-uart driver. This driver can send EC requests on UART and process response packets received on UART transport.2. Once probed, this driver will initialize the serdev device based on the underlying information in the ACPI resource. After serdev device properties are set, this driver will register itself cros-ec.3. High level driver can use this implementation to talk to ChromeOS Embedded Controller device in case it supports UART as transport.4. When cros-ec driver initiates a request packet, outgoing message is processed in buffer and sent via serdev. Once bytes are sent, driver enables a wait_queue.5. Since ChromeOS EC device sends response asynchronously, AP's TTY driver accumulates response bytes and calls the registered callback. TTY driver can send multiple callback for bytes ranging from 1 to MAX bytes supported by EC device.6. Driver waits for EC_MSG_DEADLINE_MS to collect and process received bytes. It wakes wait_queue if expected bytes are received or else wait_queue timeout. Based on the error condition, driver returns data_len or error to cros_ec.Signed-off-by: Bhanu Prakash Maiya Co-developed-by: Mark Hasemeyer Signed-off-by: Mark Hasemeyer Reviewed-by: Prashant Malani Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20221227123212.v13.1.If7926fcbad397bc6990dd725690229bed403948c@changeid List of files: /linux-6.15/drivers/platform/chrome/Makefile

5f995254 - platform/chrome: add a driver for HPS

Tue, 18 Oct 2022 04:06:23 +0000

platform/chrome: add a driver for HPSThis patch introduces a driver for the ChromeOS human presencesensor (aka. HPS). The driver supports a sensor connected to the I2C busand identified as "GOOG0020" in the ACPI tables.When loaded, the driver exports the sensor to userspace through acharacter device. This device only supports power management, i.e.,communication with the sensor must be done through regular I2Ctransmissions from userspace.Power management is implemented by enabling the respective power GPIOwhile at least one userspace process holds an open fd on the characterdevice. By default, the device is powered down if there are no activeclients.Note that the driver makes no effort to preserve the state of the sensorbetween power down and power up events. Userspace is responsible forreinitializing any needed state once power has been restored.The device firmware, I2C protocol and other documentation is availableat https://chromium.googlesource.com/chromiumos/platform/hps-firmware.Co-developed-by: Sami Kyöstilä Signed-off-by: Sami Kyöstilä Signed-off-by: Dan Callaghan Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20221018040623.2173441-1-dcallagh@chromium.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

affc804c - platform/chrome: cros_typec_switch: Add switch driver

Tue, 16 Aug 2022 21:48:30 +0000

platform/chrome: cros_typec_switch: Add switch driverIntroduce a driver to configure USB Type-C mode switches and retimerswhich are controlled by the ChromeOS EC (Embedded Controller).This allows Type-C port drivers, as well as alternate mode drivers toconfigure their relevant mode switches and retimers according to theType-C state they want to achieve.ACPI devices with ID GOOG001A will bind to this driver.Currently, we only register a retimer switch with a stub set function.Subsequent patches will implement the host command set functionality,and introduce mode switches.Signed-off-by: Prashant Malani Reviewed-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20220816214857.2088914-3-pmalani@chromium.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

f92dd147 - platform/chrome: merge Kunit utils and test cases

Wed, 20 Jul 2022 04:47:53 +0000

platform/chrome: merge Kunit utils and test casesMerge CROS_KUNIT and CROS_EC_PROTO_KUNIT_TEST so that when they're builtas modules cros_kunit_util doesn't need to export the symbols.Signed-off-by: Tzung-Bi Shih Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220720044754.4026295-2-tzungbi@kernel.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

3d3e9b0d - Revert "platform/chrome: cros_typec_switch: Add switch driver"

Tue, 19 Jul 2022 11:57:29 +0000

Revert "platform/chrome: cros_typec_switch: Add switch driver"This reverts commit e54369058f3da181fcc4c893f224a0c5a8a526b6.The chrome platform driver changes need to come in through the platformtree due to some api changes that showed up there that cause builderrors in linux-nextReported-by: Stephen Rothwell Link: https://lore.kernel.org/r/20220719160821.5e68e30b@oak.ozlabs.ibm.comCc: Prashant Malani Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/platform/chrome/Makefile

e5436905 - platform/chrome: cros_typec_switch: Add switch driver

Mon, 11 Jul 2022 07:22:58 +0000

platform/chrome: cros_typec_switch: Add switch driverIntroduce a driver to configure USB Type-C mode switches and retimerswhich are controlled by the Chrome OS EC (Embedded Controller).This allows Type-C port drivers, as well as alternate mode drivers toconfigure their relevant mode switches and retimers according to theType-C state they want to achieve.ACPI devices with ID GOOG001A will bind to this driver.Currently, we only register a retimer switch with a stub set function.Subsequent patches will implement the host command set functionality,and introduce mode switches.Reported-by: kernel test robot Signed-off-by: Prashant Malani Link: https://lore.kernel.org/r/20220711072333.2064341-5-pmalani@chromium.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/platform/chrome/Makefile

b99eb596 - platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_query_all()

Thu, 09 Jun 2022 08:49:38 +0000

platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_query_all()cros_ec_query_all() sends multiple host commands to EC for queryingsupported protocols and settings.Add required mock for interacting with cros_ec_query_all() and Kunittests.Reviewed-by: Guenter Roeck Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20220609084957.3684698-3-tzungbi@kernel.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

db681eaf - platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_prepare_tx()

Wed, 18 May 2022 09:18:11 +0000

platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_prepare_tx()cros_ec_prepare_tx() is used to fill the protocol headers according tothe requested protocol version.Add Kunit tests cros_ec_prepare_tx() for each version.Signed-off-by: Tzung-Bi Shih Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220518091814.2028579-2-tzungbi@kernel.org List of files: /linux-6.15/drivers/platform/chrome/Makefile

0a4cad9c - platform/chrome: Add ChromeOS ACPI device driver

Fri, 13 May 2022 07:52:09 +0000

platform/chrome: Add ChromeOS ACPI device driverThe x86 Chromebooks have the ChromeOS ACPI device. This driver attachesto the ChromeOS ACPI device and exports the values reported by ACPI in asysfs directory. This data isn't present in ACPI tables when readthrough ACPI tools, hence a driver is needed to do it. The driver getsdata from firmware using the ACPI component of the kernel. The ACPI valuesare presented in string form (numbers as decimal values) or binaryblobs, and can be accessed as the contents of the appropriate read onlyfiles in the standard ACPI device's sysfs directory tree. This data isconsumed by the ChromeOS user space.Reviewed-by: Guenter Roeck Reviewed-by: Andy Shevchenko Reviewed-by: Greg Kroah-Hartman Acked-by: Rafael J. Wysocki Signed-off-by: Enric Balletbo i Serra Co-developed-by: Muhammad Usama Anjum Signed-off-by: Muhammad Usama Anjum Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/Yn4OKYrtV35Dv+nd@debian-BULLSEYE-live-builder-AMD64 List of files: /linux-6.15/drivers/platform/chrome/Makefile

eabd9a38 - platform: chrome: Split trace include file

Sat, 22 Jan 2022 00:13:01 +0000

platform: chrome: Split trace include filecros_ec_trace.h defined 5 tracing events, 2 for cros_ec_proto and3 for cros_ec_sensorhub_ring.These 2 files are in different kernel modules, the traces are definedtwice in the kernel which leads to problem enabling only some traces.Move sensorhub traces from cros_ec_trace.h to cros_ec_sensorhub_trace.hand enable them only in cros_ec_sensorhub kernel module.Check we can now enable any single traces: without this patch,we can only enable all sensorhub traces or none.Fixes: d453ceb6549a ("platform/chrome: sensorhub: Add trace events for sample")Signed-off-by: Gwendal Grignou Cc: stable@vger.kernel.orgLink: https://lore.kernel.org/r/20220122001301.640337-1-gwendal@chromium.orgSigned-off-by: Benson Leung List of files: /linux-6.15/drivers/platform/chrome/Makefile

3fb57847 - platform/chrome: Add driver for ChromeOS privacy-screen

Fri, 07 Jan 2022 19:02:07 +0000

platform/chrome: Add driver for ChromeOS privacy-screenThis adds the ACPI driver for the ChromeOS privacy screen that ispresent on some chromeos devices.Note that ideally, we'd want this privacy screen driver to be probedBEFORE the drm probe in order to avoid a drm probe deferral:https://hansdegoede.livejournal.com/25948.htmlIn practise, I found that ACPI drivers are bound to their devices AFTERthe drm probe on chromebooks. So on chromebooks with privacy-screen,this patch along with the other one in this series results in a probedeferral of about 250ms for i915 driver. However, it did not result inany user noticeable delay of splash screen in my personal experience.In future if this probe deferral turns out to be an issue, we canconsider turning this ACPI driver into something that is probedearlier than the drm drivers.Signed-off-by: Rajat Jain Reviewed-by: Dmitry Torokhov Acked-by: Benson Leung Signed-off-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20220107190208.95479-2-rajatja@google.com List of files: /linux-6.15/drivers/platform/chrome/Makefile

d453ceb6 - platform/chrome: sensorhub: Add trace events for sample

Fri, 14 May 2021 00:57:33 +0000

platform/chrome: sensorhub: Add trace events for sampleAdd trace event to report samples and their timestamp coming from theEC. It allows to check if the timestamps are correct and the filter isworking correctly without introducing too much latency.To enable these events:cd /sys/kernel/debug/tracing/echo 1 > events/cros_ec/enableecho 0 > events/cros_ec/cros_ec_request_start/enableecho 0 > events/cros_ec/cros_ec_request_done/enableecho 1 > tracing_oncat trace_pipeObserve event flowing:irq/105-chromeo-95 [000] .... 613.659758: cros_ec_sensorhub_timestamp: ...irq/105-chromeo-95 [000] .... 613.665219: cros_ec_sensorhub_filter: dx: ...Signed-off-by: Gwendal Grignou Signed-off-by: Enric Balletbo i Serra List of files: /linux-6.15/drivers/platform/chrome/Makefile

145d59ba - platform/chrome: cros_ec_sensorhub: Add FIFO support

Fri, 27 Mar 2020 22:34:33 +0000

platform/chrome: cros_ec_sensorhub: Add FIFO supportcros_ec_sensorhub registers a listener and query motion sense FIFO,spread to iio sensors registers.To test, we can use libiio: iiod& iio_readdev -u ip:localhost -T 10000 -s 25 -b 16 cros-ec-gyro | od -xSigned-off-by: Gwendal Grignou Reviewed-by: Jonathan Cameron Acked-by: Andy Shevchenko Signed-off-by: Enric Balletbo i Serra List of files: /linux-6.15/drivers/platform/chrome/Makefile

fdc6b21e - platform/chrome: Add Type C connector class driver

Mon, 16 Mar 2020 09:00:17 +0000

platform/chrome: Add Type C connector class driverAdd a driver to implement the Type C connector class for Chrome OSdevices with ECs (Embedded Controllers).The driver relies on firmware device specifications for various portattributes. On ACPI platforms, this is specified using the logicaldevice with HID GOOG0014. On DT platforms, this is specified using theDT node with compatible string "google,cros-ec-typec".The driver reads the device FW node and uses the port attributes toregister the typec ports with the Type C connector class framework, butdoesn't do much else.Subsequent patches will add more functionality to the driver, includingobtaining current port information (polarity, vconn role, current powerrole etc.) after querying the EC.Co-developed-by: Benson Leung Signed-off-by: Prashant Malani Reviewed-by: Heikki Krogerus Signed-off-by: Enric Balletbo i Serra List of files: /linux-6.15/drivers/platform/chrome/Makefile

ec2daf6e - platform: chrome: Add cros-usbpd-notify driver

Fri, 24 Jan 2020 23:18:32 +0000

platform: chrome: Add cros-usbpd-notify driverChromiumOS uses ACPI device with HID "GOOG0003" for power deliveryrelated events. The existing cros-usbpd-charger driver relies on theseevents without ever actually receiving them on ACPI platforms. This isbecause in the ChromeOS kernel trees, the GOOG0003 device is owned by anACPI driver that offers firmware updates to USB-C chargers.Introduce a new platform driver under cros-ec, the ChromeOS embeddedcontroller, that handles these PD events and dispatches themappropriately over a notifier chain to all drivers that use them.On platforms that don't have the ACPI device defined, the driver getsinstantiated for ECs which support the EC_FEATURE_USB_PD feature bit,and the notification events will get delivered using the MKBP eventhandling mechanism.Co-Developed-by: Prashant Malani Reviewed-by: Gwendal Grignou Reviewed-by: Benson Leung Signed-off-by: Jon Flatley Signed-off-by: Prashant Malani Acked-By: Enric Balletbo i Serra Signed-off-by: Benson Leung List of files: /linux-6.15/drivers/platform/chrome/Makefile