kernel.git/drivers/platform/x86/x86-android-tablets, branch linux-rolling-stable

platform: x86: replace use of system_wq with system_percpu_wq

2025-11-28T10:07:00Z

This patch continues the effort to refactor workqueue APIs, which has begun with the changes introducing new workqueues and a new alloc_workqueue flag: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") The point of the refactoring is to eventually alter the default behavior of workqueues to become unbound by default so that their workload placement is optimized by the scheduler. Before that to happen after a careful review and conversion of each individual case, workqueue users must be converted to the better named new workqueues with no intended behaviour changes: system_wq -> system_percpu_wq system_unbound_wq -> system_dfl_wq This way the old obsolete workqueues (system_wq, system_unbound_wq) can be removed in the future. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/ Link: https://patch.msgid.link/20251127144125.233728-3-marco.crivellari@suse.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Omit a variable reassignment in lenovo_yoga_tab2_830_1050_init_codec()

2025-11-05T08:50:08Z

An error code was assigned to a variable and checked accordingly. This value was passed to a dev_err_probe() call in an if branch. This function is documented in the way that the same value is returned. Thus delete a redundant variable reassignment. The source code was transformed by using the Coccinelle software. Signed-off-by: Markus Elfring Link: https://patch.msgid.link/90a2385c-9d19-46f2-8d31-618d5c10aa91@web.de Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Stop using EPROBE_DEFER

2025-09-26T11:26:43Z

Since the x86-android-tablets code uses platform_create_bundle() it cannot use EPROBE_DEFER and the driver-core will translate EPROBE_DEFER to ENXIO. Stop using EPROBE_DEFER instead log an error and return ENODEV, or for non-fatal cases log a warning and return 0. Reviewed-by: Dmitry Torokhov Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-21-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Fix modules lists for Lenovo devices

2025-09-26T11:26:42Z

2 fixes for Lenovo tablets: - The bq24190 charger on the Lenovo Yoga Tab2 830/1050 devices does not use the crystal-cove PMIC charger IRQ, so these shouldn't use bq24190_modules as that includes "intel_crystal_cove_charger" - Both the Tab2 and the Tab3 devices have a SPI audio-codec which init() attaches properties to, resp. the whole SPI device gets instantiated by the x86-android-tablets code. This requires the "spi_pxa2xx_platform" module to be loaded before init() runs Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-20-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Simplify lenovo_yoga_tab2_830_1050_exit()

2025-09-26T11:26:40Z

lenovo_yoga_tab2_830_1050_exit() only gets called after a successful lenovo_yoga_tab2_830_1050_init() call so there is no need to check if lenovo_yoga_tab2_830_1050_codec_[dev|pinctrl] are set. Also change the exit() order to be the exact reverse of init(). Reviewed-by: Dmitry Torokhov Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-19-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Add support for Acer A1-840 tablet

2025-09-26T11:26:39Z

Add support for the Acer Iconia One 8 A1-840 (non FHD version) tablet. This tablet has the usual issues for tablets shipped with Android as factory OS. The DSDT is broken in various ways, so i2c_clients for various devices as well as the INT3496 platform-device for OTG extcon handling need to be instantiated manually by x86-android-tablets. This tablet is special in that it is the first time a Bay Trail device has been found to use the Dollar Cove TI PMIC and the first time that the PMIC's Coulomb Counter is used as fuel-gauge. So far this PMIC has only been used together with Cherry Trail SoCs and always in combination with a separate full-featured fuel-gauge IC. Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-18-hansg@kernel.org Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Move Acer info to its own file

2025-09-26T11:26:37Z

Acer has several x86 based Android tablets which need x86-android-tablets support to work around their broken ACPI tables. At the moment x86-android-tablets only support one model, move this to its own file before adding support for more models to avoid needing to move more code around later. Reviewed-by: Dmitry Torokhov Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-17-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Update my email address

2025-09-26T11:26:35Z

hdegoede@redhat.com will stop working soon, replace it with my kernel.org address. Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-16-hansg@kernel.org Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: Simplify node-group [un]registration

2025-09-26T11:26:34Z

software_node_register_node_group() / software_node_unregister_node_group() both accept a NULL node-group as argument. So there is no need to check for the node-group being NULL before calling these functions, remove the checks to simplify the code. Note the "if (gpio_button_swnodes)" check for registering is kept because that also guards the creation of a gpio-button platform-device. Suggested-by: Andy Shevchenko Signed-off-by: Hans de Goede Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20250920200713.20193-15-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86: x86-android-tablets: use swnode_group instead of manual registering

2025-09-26T11:26:32Z

Replace manually calling software_node_register_node_group() from init() with the new swnode_group registration mechanism. Note this also fixes a missing software_node_unregister_node_group() for lenovo_yt3_swnodes. Reviewed-by: Dmitry Torokhov Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-14-hansg@kernel.org Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen