kernel/linux.git/drivers/power/reset, branch v4.4.235

power: vexpress: add suppress_bind_attrs to true

2020-06-20T08:23:24+00:00

commit 73174acc9c75960af2daa7dcbdb9781fc0d135cb upstream. Make sure that the POWER_RESET_VEXPRESS driver won't have bind/unbind attributes available via the sysfs, so lets be explicit here and use ".suppress_bind_attrs = true" to prevent userspace from doing something silly. Link: https://lore.kernel.org/r/20200527112608.3886105-2-anders.roxell@linaro.org Cc: stable@vger.kernel.org Signed-off-by: Anders Roxell Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman

power: vexpress: fix corruption in notifier registration

2018-10-10T06:52:04+00:00

[ Upstream commit 09bebb1adb21ecd04adf7ccb3b06f73e3a851e93 ] Vexpress platforms provide two different restart handlers: SYS_REBOOT that restart the entire system, while DB_RESET only restarts the daughter board containing the CPU. DB_RESET is overridden by SYS_REBOOT if it exists. notifier_chain_register used in register_restart_handler by design relies on notifiers to be registered once only, however vexpress restart notifier can get registered twice. When this happen it corrupts list of notifiers, as result some notifiers can be not called on proper event, traverse on list can be cycled forever, and second unregister can access already freed memory. So far, since this was the only restart handler in the system, no issue was observed even if the same notifier was registered twice. However commit 6c5c0d48b686 ("watchdog: sp805: add restart handler") added support for SP805 restart handlers and since the system under test contains two vexpress restart and two SP805 watchdog instances, it was observed that during the boot traversing the restart handler list looped forever as there's a cycle in that list resulting in boot hang. This patch fixes the issues by ensuring that the notifier is installed only once. Cc: Sebastian Reichel Signed-off-by: Sudeep Holla Fixes: 46c99ac66222 ("power/reset: vexpress: Register with kernel restart handler") Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

power: reset: zx-reboot: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE

2018-02-03T16:04:25+00:00

commit 348c7cf5fcbcb68838255759d4cb45d039af36d2 upstream. This change resolves a new compile-time warning when built as a loadable module: WARNING: modpost: missing MODULE_LICENSE() in drivers/power/reset/zx-reboot.o see include/linux/module.h for more information This adds the license as "GPL v2", which matches the header of the file. MODULE_DESCRIPTION and MODULE_AUTHOR are also added. Signed-off-by: Jesse Chan Signed-off-by: Sebastian Reichel Signed-off-by: Greg Kroah-Hartman

power: reset: at91-poweroff: timely shutdown LPDDR memories

2017-04-08T07:53:32+00:00

commit 0b0408745e7ff24757cbfd571d69026c0ddb803c upstream. LPDDR memories can only handle up to 400 uncontrolled power off. Ensure the proper power off sequence is used before shutting down the platform. Signed-off-by: Alexandre Belloni Signed-off-by: Sebastian Reichel Signed-off-by: Greg Kroah-Hartman

power: reset: hisi-reboot: Unmap region obtained by of_iomap

2016-09-30T08:18:38+00:00

commit bae170efd6c42bf116f513a1dd07639d68fa71b9 upstream. Free memory mapping, if probe is not successful. Fixes: 4a9b37371822 ("power: reset: move hisilicon reboot code") Signed-off-by: Arvind Yadav Signed-off-by: Sebastian Reichel Signed-off-by: Greg Kroah-Hartman

power: reset: at91-reset/trivial: driver applies to SAMA5 family as well

2015-09-22T13:45:39+00:00

This diver doesn't applies only on SAM9 SoC families but on SAMA5 families as well. Signed-off-by: Nicolas Ferre Signed-off-by: Sebastian Reichel

power/reset: at91-poweroff: get and use slow clock

2015-09-22T13:18:53+00:00

Commit dca1a4b5ff6e ("clk: at91: keep slow clk enabled to prevent system hang") added a workaround for the slow clock as it is not properly handled by its users. Get and use the slow clock as it is necessary for the at91 shutdown controller. Signed-off-by: Alexandre Belloni Signed-off-by: Sebastian Reichel

power/reset: at91-poweroff: allow compiling as a module

2015-09-22T13:18:53+00:00

It was not possible to compile at91-poweroff as a module. Implement .remove() to allow it. Also switch to module_platform_driver_probe() as it is not hotpluggable. Signed-off-by: Alexandre Belloni Signed-off-by: Sebastian Reichel

power/reset: at91-reset: get and use slow clock

2015-09-22T13:18:52+00:00

Commit dca1a4b5ff6e ("clk: at91: keep slow clk enabled to prevent system hang") added a workaround for the slow clock as it is not properly handled by its users. Get and use the slow clock as it is necessary for the at91 reset controller. Signed-off-by: Alexandre Belloni Signed-off-by: Sebastian Reichel

power/reset: at91-reset: allow compiling as a module

2015-09-22T13:18:52+00:00

It was not possible to compile at91-reset as a module. Implement .remove() to allow it. Also switch to module_platform_driver_probe() as it is not hotpluggable. Signed-off-by: Alexandre Belloni Signed-off-by: Sebastian Reichel