kernel/linux.git/drivers/power/sequencing, branch v6.12.80

power: sequencing: fix missing state_lock in pwrseq_power_on() error path

2026-03-04T12:21:09+00:00

[ Upstream commit e1dccb485c2876ac1318f36ccc0155416c633a48 ] pwrseq_power_on() calls pwrseq_unit_disable() when the post_enable callback fails. However, this call is outside the scoped_guard(mutex, &pwrseq->state_lock) block that ends. pwrseq_unit_disable() has lockdep_assert_held(&pwrseq->state_lock), which will fail when called from this error path. Add the scoped_guard block to cover the post_enable callback and its error handling to ensure the lock is held when pwrseq_unit_disable() is called. Signed-off-by: Ziyi Guo Link: https://patch.msgid.link/20260130182651.1576579-1-n7l8m4@u.northwestern.edu Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin

power: sequencing: make the QCom PMU pwrseq driver depend on CONFIG_OF

2024-12-05T13:01:29+00:00

[ Upstream commit f82bf3c5796e1630d553669fb451e6c9d4070512 ] This driver uses various OF-specific functions and depends on phandle parsing. There's no reason to make it available to non-OF systems so add a relevant dependency switch to its Kconfig entry. Fixes: 2f1630f437df ("power: pwrseq: add a driver for the PMU module on the QCom WCN chipsets") Link: https://lore.kernel.org/r/20241004130449.51725-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin

Merge tag 'pwrseq-updates-for-v6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

2024-09-18T08:46:27+00:00

Pull power sequencing updates from Bartosz Golaszewski: "There's one change adding support for a new PMU model and another adding documentation for the subsystem which probably should have been part of the initial commit but better late than never: - add support for the new PMU variant inside the WCN6855 chipset - add documentation for the subsystem" * tag 'pwrseq-updates-for-v6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: Documentation: add a driver API doc for the power sequencing subsystem power: sequencing: qcom-wcn: add support for the WCN6855 PMU

power: sequencing: qcom-wcn: set the wlan-enable GPIO to output

2024-08-31T19:32:19+00:00

Commit a9aaf1ff88a8 ("power: sequencing: request the WLAN enable GPIO as-is") broke WLAN on boards on which the wlan-enable GPIO enabling the wifi module isn't in output mode by default. We need to set direction to output while retaining the value that was already set to keep the ath module on if it's already started. Fixes: a9aaf1ff88a8 ("power: sequencing: request the WLAN enable GPIO as-is") Link: https://lore.kernel.org/r/20240823115500.37280-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

power: sequencing: qcom-wcn: add support for the WCN6855 PMU

2024-08-19T08:03:31+00:00

Enable support for controlling the power-up sequence of the PMU inside the WCN6855 model. Signed-off-by: Konrad Dybcio [Bartosz: split Konrad's bigger patch, write the commit message] Co-developed-by: Bartosz Golaszewski Link: https://lore.kernel.org/r/20240813190841.155067-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

power: sequencing: request the WLAN enable GPIO as-is

2024-08-19T07:55:53+00:00

If the WCN module is powered up before linux boots and the ath11k driver probes at the same time as the power sequencing driver, we may end up driving the wlan-enable GPIO low in the latter, breaking the start-up of the WLAN module. Request the wlan-enable GPIO as-is so that if the WLAN module is already starting/started, we leave it alone. Fixes: 2f1630f437df ("power: pwrseq: add a driver for the PMU module on the QCom WCN chipsets") Reported-by: Stephan Gerhold Link: https://lore.kernel.org/r/20240813190751.155035-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

power: sequencing: fix an invalid pointer dereference in error path

2024-07-17T14:30:50+00:00

We may end up calling pwrseq_target_free() on a partially initialized target object whose unit is either NULL or an ERR_PTR(). Avoid dereferencing invalid memory by adding an appropriate check to pwrseq_target_free(). Fixes: 249ebf3f65f8 ("power: sequencing: implement the pwrseq core") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/linux-pm/62a3531e-9927-40f8-b587-254a2dfa47ef@stanley.mountain/ Reviewed-by: Dan Carpenter Link: https://lore.kernel.org/r/20240712194004.241939-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

power: sequencing: simplify returning pointer without cleanup

2024-07-03T09:49:04+00:00

Use 'return_ptr' helper for returning a pointer without cleanup for shorter code. Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20240703083038.95777-1-krzysztof.kozlowski@linaro.org Signed-off-by: Bartosz Golaszewski

power: pwrseq: add a driver for the PMU module on the QCom WCN chipsets

2024-06-12T07:20:13+00:00

This adds the power sequencing driver for the PMU modules present on the Qualcomm WCN Bluetooth and Wifi chipsets. It uses the pwrseq subsystem and knows how to match the sequencer to the consumer device by verifying the relevant properties and DT layout. Using this driver will allow the BT and WLAN drivers to respect the required delays between enabling the two modules. Tested-by: Amit Pundir Tested-by: Neil Armstrong # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly # OnePlus 8T Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20240605123850.24857-3-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

power: sequencing: implement the pwrseq core

2024-06-12T07:20:13+00:00

Implement the power sequencing subsystem allowing devices to share complex powering-up and down procedures. It's split into the consumer and provider parts but does not implement any new DT bindings so that the actual power sequencing is never revealed in the DT representation. Tested-by: Amit Pundir Tested-by: Neil Armstrong # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly # OnePlus 8T Acked-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20240605123850.24857-2-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski