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Author SHA1 Message Date
Bartosz Golaszewski
62b5848f73 power: sequencing: add defines for return values of the match() callback 
Instead of using 0 and 1 as magic numbers, let's add proper defines
whose names tell the reader what the meaning behind them is.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250624-pwrseq-match-defines-v1-3-a59d90a951f1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2025-06-30 09:07:26 +02:00
Bartosz Golaszewski
a19ce320c3 power: sequencing: fix an invalid pointer dereference in error path 
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: 249ebf3f65 ("power: sequencing: implement the pwrseq core")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-pm/62a3531e-9927-40f8-b587-254a2dfa47ef@stanley.mountain/
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/20240712194004.241939-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2024-07-17 16:30:50 +02:00
Krzysztof Kozlowski
eba6d0f88b power: sequencing: simplify returning pointer without cleanup 
Use 'return_ptr' helper for returning a pointer without cleanup for
shorter code.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240703083038.95777-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2024-07-03 11:49:04 +02:00
Bartosz Golaszewski
249ebf3f65 power: sequencing: implement the pwrseq core 
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 <amit.pundir@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK
Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20240605123850.24857-2-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
 2024-06-12 09:20:13 +02:00