kernel/linux.git/drivers/platform/arm64, branch v6.18.21

platform: arm64: thinkpad-t14s-ec: sleep after EC access

2025-11-21T17:05:27+00:00

The ACPI ECRD and ECWR functions have a 10ms sleep at the end. It turns out, that this is sometimes needed to avoid I2C transmission failures, especially for functions doing regmap_update_bits (and thus read + write shortly after each other). This fixes problems like the following appearing in the kernel log: leds platform::micmute: Setting an LED's brightness failed (-6) leds platform::kbd_backlight: Setting an LED's brightness failed (-6) The ACPI QEVT function used to read the interrupt status register also has a 10ms sleep at the end. Without that there are problems with reading multiple events following directly after each other resulting in the following error message being logged: thinkpad-t14s-ec 4-0028: Failed to read event Fixes: 60b7ab6ce030 ("platform: arm64: thinkpad-t14s-ec: new driver") Signed-off-by: Sebastian Reichel Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-2-441219857c02@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform: arm64: thinkpad-t14s-ec: fix IRQ race condition

2025-11-21T17:05:25+00:00

Fix a race condition, that an input key related interrupt might be triggered before the input handler has been registered, which results in a NULL pointer dereference. This can happen if the user enables the keyboard backlight shortly before the driver is being probed. This fixes the following backtrace visible in dmesg: Unable to handle kernel NULL pointer dereference at virtual address 00000000000000e0 ... Call trace: sparse_keymap_report_event+0x2c/0x978 [sparse_keymap] (P) t14s_ec_irq_handler+0x190/0x3e8 [lenovo_thinkpad_t14s] irq_thread_fn+0x30/0xb8 irq_thread+0x18c/0x3b0 kthread+0x148/0x228 ret_from_fork+0x10/0x20 Fixes: 60b7ab6ce030 ("platform: arm64: thinkpad-t14s-ec: new driver") Signed-off-by: Sebastian Reichel Reviewed-by: Bryan O'Donoghue Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-1-441219857c02@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform: arm64: thinkpad-t14s-ec: new driver

2025-09-26T11:24:16+00:00

Introduce EC driver for the ThinkPad T14s Gen6 Snapdragon, which is in theory compatible with ThinkPad ACPI. On Linux the system is booted with device tree, which is not supported by the ThinkPad ACPI driver (drivers/platform/x86/lenovo/thinkpad_acpi.c). Also most of the hardware compatibility is handled via ACPI tables, which are obviously not used when booting via device tree. Thus adding DT compatibility to the existing driver is not worth it as there is almost no code sharing. The driver currently exposes features, which are not available via other means: * Extra Keys * System LEDs * Keyboard Backlight Control The driver has been developed by reading the ACPI DSDT. There are some more features around thermal control, which are not yet supported by the driver. The speaker mute and mic mute LEDs need some additional changes in the ALSA UCM to be set automatically. Tested-by: Neil Armstrong # on Thinkpad T14S OLED Reviewed-by: Bryan O'Donoghue Signed-off-by: Sebastian Reichel Link: https://patch.msgid.link/20250918-thinkpad-t14s-ec-v5-2-ac0bc6382c5c@collabora.com [ij: folded in patch from Chen Ni ] Link: https://patch.msgid.link/20250926091302.817919-1-nichen@iscas.ac.cn [ij: folded in patch from Lukas Bulwahn ] Link: https://patch.msgid.link/20250926071859.138396-1-lukas.bulwahn@redhat.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Merge branch 'fixes' into 'for-next'

2025-07-21T13:37:27+00:00

Merge the fixes branch into the for-next branch to resolve Makefile conflict and include the power supply accessor work that is required by the upcoming Uniwill driver.

platform: arm64: huawei-gaokun-ec: fix OF node leak

2025-07-11T15:48:39+00:00

Make sure to drop the OF node reference taken when creating the Gaokun auxiliary devices when the devices are later released. Fixes: 7636f090d02e ("platform: arm64: add Huawei Matebook E Go EC driver") Cc: Pengyu Luo Signed-off-by: Johan Hovold Reviewed-by: Pengyu Luo Link: https://lore.kernel.org/r/20250708085358.15657-1-johan@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform: arm64: lenovo-yoga-c630: use the auxiliary device creation helper

2025-06-13T09:33:30+00:00

The auxiliary device creation of this driver is simple enough to use the available auxiliary device creation helper. Use it and remove some boilerplate code. Signed-off-by: Jerome Brunet Reviewed-by: Bryan O'Donoghue Link: https://lore.kernel.org/r/20250610-yoga-aux-v1-1-d6115aa1683c@baylibre.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Merge tag 'platform-drivers-x86-v6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

2025-05-29T17:19:22+00:00

Pull x86 platform drivers updates from Ilpo Järvinen: "The changes are mostly business as usual. Besides pdx86 changes, there are a few power supply changes needed for related pdx86 features, move of oxpec driver from hwmon (oxp-sensors) to pdx86, and one FW version warning to hid-asus. Highlights: - alienware-wmi-wmax: - Add HWMON support - Add ABI and admin-guide documentation - Expose GPIO debug methods through debug FS - Support manual fan control and "custom" thermal profile - amd/hsmp: - Add sysfs files to show HSMP telemetry - Report power readings and limits via hwmon - amd/isp4: Add AMD ISP platform config for OV05C10 - asus-wmi: - Refactor Ally suspend/resume to work better with older FW - hid-asus: check ROG Ally MCU version and warn about old FW versions - dasharo-acpi: - Add driver for Dasharo devices supporting fans and temperatures monitoring - dell-ddv: - Expose the battery health and manufacture date to userspace using power supply extensions - Implement the battery matching algorithm - dell-pc: - Improve error propagation - Use faux device - int3472: - Add delays to avoid GPIO regulator spikes - Add handshake pin support - Make regulator supply name configurable and allow registering more than 1 GPIO regulator - Map mt9m114 powerdown pin to powerenable - intel/pmc: Add separate SSRAM Telemetry driver - intel-uncore-freq: Add attributes to show agent types and die ID - ISST: - Support SST-TF revision 2 (allows more cores per bucket) - Support SST-PP revision 2 (fabric 1 frequencies) - Remove unnecessary SST MSRs restore (the package retains MSRs despite CPU offlining) - mellanox: Add support for SN2201, SN4280, SN5610, and SN5640 - mellanox: mlxbf-pmc: Support additional PMC blocks - oxpec: - Add OneXFly variants - Add support for charge limit, charge thresholds, and turbo LED - Distinguish current X1 variants to avoid unwanted matching to new variants - Follow hwmon conventions - Move from hwmon/oxp-sensors to platform/x86 to match the enlarged scope - power supply: - Add inhibit-charge-awake (needed by oxpec) - Add additional battery health status values ("blown fuse" and "cell imbalance") (needed by dell-ddv) - powerwell-ec: Add driver for Portwell EC supporting GPIO and watchdog - thinkpad-acpi: Support camera shutter switch hotkey - tuxedo: Add virtual LampArray for TUXEDO NB04 devices - tools/power/x86/intel-speed-select: - Support displaying SST-PP revision 2 fields - Skip uncore frequency update on newer generations of CPUs - Miscellaneous cleanups / refactoring / improvements" * tag 'platform-drivers-x86-v6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (112 commits) thermal/drivers/acerhdf: Constify struct thermal_zone_device_ops platform/x86/amd/hsmp: fix building with CONFIG_HWMON=m platform/x86: asus-wmi: fix build without CONFIG_SUSPEND docs: ABI: Fix "aassociated" to "associated" platform/x86: Add AMD ISP platform config for OV05C10 Documentation: admin-guide: pm: Add documentation for die_id platform/x86/intel-uncore-freq: Add attributes to show die_id platform/x86/intel: power-domains: Add interface to get Linux die ID Documentation: admin-guide: pm: Add documentation for agent_types platform/x86/intel-uncore-freq: Add attributes to show agent types platform/x86/tuxedo: Prevent invalid Kconfig state platform/x86: dell-ddv: Expose the battery health to userspace platform/x86: dell-ddv: Expose the battery manufacture date to userspace platform/x86: dell-ddv: Implement the battery matching algorithm power: supply: core: Add additional health status values platform/x86/amd/hsmp: acpi: Add sysfs files to display HSMP telemetry platform/x86/amd/hsmp: Report power via hwmon sensors platform/x86/amd/hsmp: Use a single DRIVER_VERSION for all hsmp modules platform/mellanox: mlxreg-dpu: Fix smatch warnings platform: mellanox: nvsw-sn2200: Fix .items in nvsw_sn2201_busbar_hotplug ...

platform: arm64: acer-aspire1-ec: convert to devm_drm_bridge_alloc() API

2025-04-29T09:21:19+00:00

This is the new API for allocating DRM bridges. Acked-by: Ilpo Järvinen Signed-off-by: Luca Ceresoli Link: https://patchwork.freedesktop.org/patch/msgid/20250424-drm-bridge-convert-to-alloc-api-v2-2-8f91a404d86b@bootlin.com Signed-off-by: Louis Chauvet

platform: Do not enable by default during compile testing

2025-04-24T12:53:35+00:00

Enabling the compile test should not cause automatic enabling of all drivers, but only allow to choose to compile them. Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250417074648.81528-1-krzysztof.kozlowski@linaro.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

Merge drm/drm-next into drm-misc-next

2025-04-07T12:35:48+00:00

Backmerging to get v6.15-rc1 into drm-misc-next. Also fixes a build issue when enabling CONFIG_DRM_SCHED_KUNIT_TEST. Signed-off-by: Thomas Zimmermann