kernel/linux.git/drivers/power/reset, branch v6.18.21

power: reset: tdx-ec-poweroff: fix restart

2026-03-04T12:21:19+00:00

[ Upstream commit 562357a6310f79e45844c3e980d410a1e8e02ce6 ] During testing, restart occasionally failed on Toradex modules. The issue was traced to an interaction between the EC-based reset/poweroff handler and the PSCI restart handler. While the embedded controller is resetting or powering off the module, the PSCI code may still be invoked, triggering an I2C transaction to the PMIC. This can leave the PMIC I2C in a frozen state. Add a delay after issuing the EC reset or power-off command to give the controller time to complete the operation and avoid falling back to another restart/poweroff provider. Also print an error message if sending the command to the embedded controller fails. Fixes: 18672fe12367 ("power: reset: add Toradex Embedded Controller") Cc: stable@vger.kernel.org Signed-off-by: Emanuele Ghidoli Reviewed-by: Francesco Dolcini Link: https://patch.msgid.link/20260130071208.1184239-1-ghidoliemanuele@gmail.com Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: nvmem-reboot-mode: respect cell size for nvmem_cell_write

2026-02-26T22:59:24+00:00

[ Upstream commit 36b05629226413836cfbb3fbe6689cd188bca156 ] Some platforms expose reboot mode cells that are smaller than an unsigned int, in which cases lead to write failures. Read the cell first to determine actual size and only write the number of bytes the cell can hold. Fixes: 7a78a7f7695b ("power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface") Signed-off-by: Alexander Koskovich Link: https://patch.msgid.link/20251214191529.2470580-1-akoskovich@pm.me Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

driver: reset: th1520-aon: add driver for poweroff/reboot via AON FW

2025-09-19T10:55:20+00:00

This driver implements poweroff/reboot support for T-Head TH1520 SoCs running the AON firmware by sending a message to the AON firmware's WDG part. This is a auxiliary device driver, and expects the AON channel to be passed via the platform_data of the auxiliary device. Signed-off-by: Icenowy Zheng Acked-by: Sebastian Reichel Signed-off-by: Ulf Hansson

Merge tag 'for-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

2025-08-01T04:39:01+00:00

Pull power supply and reset updates from Sebastian Reichel: "Power-supply core: - battery-info: replace any DT specific bits with fwnode usage - replace any device-tree code with generic fwnode based handling Power-supply drivers: - ug3105_battery: use battery-info API - qcom_battmgr: report capacity - qcom_battmgr: support LiPo battery reporting - add missing missing power-supply ref to a bunch of DT bindings - update drivers regarding pm_runtime_autosuspend() usage - misc minor fixes and cleanups Reset drivers: - misc minor cleanups" * tag 'for-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (32 commits) power: supply: core: fix static checker warning power: supply: twl4030_charger: Remove redundant pm_runtime_mark_last_busy() calls power: supply: bq24190: Remove redundant pm_runtime_mark_last_busy() calls MAINTAINERS: rectify file entry in QUALCOMM SMB CHARGER DRIVER power: supply: max1720x correct capacity computation MAINTAINERS: add myself as smbx charger driver maintainer power: supply: pmi8998_charger: rename to qcom_smbx power: supply: qcom_pmi8998_charger: fix wakeirq power: supply: max14577: Handle NULL pdata when CONFIG_OF is not set power: return the correct error code power: reset: POWER_RESET_TORADEX_EC should depend on ARCH_MXC power: supply: cpcap-charger: Fix null check for power_supply_get_by_name power: supply: bq25980_charger: Constify reg_default array power: supply: bq256xx_charger: Constify reg_default array power: reset: at91-sama5d2_shdwc: Refactor wake-up source logging to use dev_info power: reset: qcom-pon: Rename variables to use generic naming power: supply: qcom_battmgr: Add lithium-polymer entry power: supply: qcom_battmgr: Report battery capacity power: supply: bq24190: Free battery_info power: supply: ug3105_battery: Switch to power_supply_batinfo_ocv2cap() ...

power: reset: macsmc-reboot: Add driver for rebooting via Apple SMC

2025-07-24T08:47:33+00:00

This driver implements the reboot/shutdown support exposed by the SMC on Apple Silicon machines, such as Apple M1 Macs. Signed-off-by: Hector Martin Reviewed-by: Alyssa Rosenzweig Reviewed-by: Neal Gompa Reviewed-by: Sebastian Reichel Signed-off-by: Sven Peter Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-7-556cafd771d3@kernel.org Signed-off-by: Lee Jones

power: reset: POWER_RESET_TORADEX_EC should depend on ARCH_MXC

2025-06-22T17:24:55+00:00

The Toradex Embedded Controller is currently only present on Toradex SMARC iMX8MP and iMX95 SoMs. Hence add a dependency on ARCH_MXC, to prevent asking the user about this driver when configuring a kernel without NXP i.MX SoC family support. Fixes: 18672fe12367ed44 ("power: reset: add Toradex Embedded Controller") Signed-off-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/1ef0beb1e09bf914650f9f9885a33af06772540d.1746536287.git.geert+renesas@glider.be Signed-off-by: Sebastian Reichel

power: reset: at91-sama5d2_shdwc: Refactor wake-up source logging to use dev_info

2025-06-22T01:04:51+00:00

Use dev_info() instead of pr_info() for more consistent logging in the driver. [root@sam9x75eb ~]$ dmesg | grep power [ 1.678542] at91-shdwc fffffe10.poweroff: Wake-Up source: WKUP pin Signed-off-by: Mihai Sain Link: https://lore.kernel.org/r/20250610124545.175492-3-mihai.sain@microchip.com Signed-off-by: Sebastian Reichel

power: reset: qcom-pon: Rename variables to use generic naming

2025-06-22T01:00:26+00:00

The qcom-pon driver was originally implemented for the PM8916 PMIC, and as a result, several internal variable names still refer to 'pm8916'. However, the driver has since been extended to support other PMICs as well. This patch renames those variables to use more generic and consistent names, improving clarity and reducing confusion for non-PM8916 devices. Signed-off-by: Taeyoung Kwon Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250521131116.2664-1-Taeyoung.Kwon@telit.com Signed-off-by: Sebastian Reichel

power: reset: syscon-reboot: add gs101-specific reset

2025-04-30T22:41:31+00:00

Linux supports a couple different reset modes, but this driver here doesn't distinguish between them and issues the same syscon register write irrespective of the reset mode requested by the kernel. Since DTs should not encode register writes (see e.g. [1]), update this driver to support different reset modes based on DT compatible match. At the same time, add support for Google GS101, which does support cold, hard, warm, and soft. As an example why this is useful, other than properly supporting the Linux reboot= kernel command line option or sysfs entry, this change allows gs101-platforms to default to a more secure cold-reset, but also to warm-reset in case RAM contents needs to be retained across the reset. Link: https://lore.kernel.org/all/20250227132644.GA1924628-robh@kernel.org/ [1] Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20250401-syscon-reboot-reset-mode-v5-2-5b9357442363@linaro.org Signed-off-by: Sebastian Reichel

power: reset: add Toradex Embedded Controller

2025-04-28T23:13:10+00:00

Toradex SMARC iMX8MP and SMARC iMX95 SoM modules use a small Embedded Controller (EC) to manage power and reset functions and related SMARC signals. This driver implements power-off and reboot handlers, communicating with the EC via I2C to issue the appropriate power management commands. During probe, the driver logs the Embedded Controller ID (unique ID for each SMARC board supported) in hex format along with the firmware version. Signed-off-by: Emanuele Ghidoli Signed-off-by: Francesco Dolcini Link: https://lore.kernel.org/r/20250414171455.155155-3-francesco@dolcini.it Signed-off-by: Sebastian Reichel