kernel/linux.git/drivers/platform/arm64, branch v7.0-rc7

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

Merge branch 'fixes' of into for-next

2025-12-01T09:53:59+00:00

The current set of DMI board IDs from the fixes branch is required to reorder them in the for-next branch.

platform: arm64: thinkpad-t14s-ec: add suspend handler for keyboard backlight

2025-11-24T17:05:57+00:00

This ensures that the keyboard backlight state is restored after a suspend-resume cycle. Otherwise the keyboard is automatically disabled during suspend and then stays disabled after resume. Note, that this adopts the same behavior as the existing Thinkpad ACPI driver. Signed-off-by: Sebastian Reichel Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-4-441219857c02@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform: arm64: thinkpad-t14s-ec: add system PM hooks

2025-11-24T17:05:54+00:00

Improve support for system suspend. The register information has been extracted from the ACPI DSDT code handling Windows Modern Standby. I took over the weird multi-write function from the ACPI DSDT code where it is called ECWS. In addition to writing to the 0xE0 register, the ACPI Windows Modern Standby code also does some changes to the thermal configuration. This part is not implemented. After this patch the laptop's power and LID LEDs will switch into the typical breathing animation when the system is suspended and enabled normally again after resuming. Signed-off-by: Sebastian Reichel Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-3-441219857c02@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

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