Hi, We have at least few cases where hardware engineers decided to use one powerdown/shutdown/reset GPIO line for multiple devices: 1. WSA884x (this and previous patch): https://lore.kernel.org/all/b7aeda24-d638-45b7-8e30-80d287f498f8@xxxxxxxxxxxxx/ 2. https://lore.kernel.org/all/20231027033104.1348921-1-chris.packham@xxxxxxxxxxxxxxxxxxx/ 3. https://lore.kernel.org/lkml/20191030120440.3699-1-peter.ujfalusi@xxxxxx/ 4. https://lore.kernel.org/all/20211018234923.1769028-1-sean.anderson@xxxxxxxx/ 5. https://social.treehouse.systems/@marcan/111268780311634160 I try to solve my case, hopefuly Chris' (2), partially Sean's (4) and maybe Hectors (5), using Rob's suggestion: https://lore.kernel.org/all/YXi5CUCEi7YmNxXM@xxxxxxxxxxxxxxxxxx/ Best regards, Krzysztof Cc: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx> Cc: Bartosz Golaszewski <brgl@xxxxxxxx> Cc: Sean Anderson <sean.anderson@xxxxxxxx> Krzysztof Kozlowski (4): reset: instantiate reset GPIO controller for shared reset-gpios reset: add GPIO-based reset controller ASoC: dt-bindings: qcom,wsa8840: Add reset-gpios for shared line ASoC: codecs: wsa884x: Allow sharing reset GPIO .../bindings/sound/qcom,wsa8840.yaml | 9 +- MAINTAINERS | 5 + drivers/reset/Kconfig | 9 ++ drivers/reset/Makefile | 1 + drivers/reset/core.c | 70 ++++++++++-- drivers/reset/reset-gpio.c | 105 ++++++++++++++++++ include/linux/reset-controller.h | 2 + sound/soc/codecs/wsa884x.c | 52 +++++++-- 8 files changed, 231 insertions(+), 22 deletions(-) create mode 100644 drivers/reset/reset-gpio.c -- 2.34.1
