[PATCH v4 00/10] gpio: improve support for shared GPIOs

[Val Packett]

Hi,

On 11/12/25 10:55 AM, Bartosz Golaszewski wrote:
> ---
> Bartosz Golaszewski (10):
>        string: provide strends()
>        gpiolib: define GPIOD_FLAG_SHARED
>        gpiolib: implement low-level, shared GPIO support
>        gpio: shared-proxy: implement the shared GPIO proxy driver
>        gpiolib: support shared GPIOs in core subsystem code
>        gpio: provide gpiod_is_shared()
>        arm64: select HAVE_SHARED_GPIOS for ARCH_QCOM
>        ASoC: wsa881x: drop GPIOD_FLAGS_BIT_NONEXCLUSIVE flag from GPIO lookup
>        ASoC: wsa883x: drop GPIOD_FLAGS_BIT_NONEXCLUSIVE flag from GPIO lookup
>        regulator: make the subsystem aware of shared GPIOs

this seems to actually have caused a regression for me, audio does not 
initialize anymore on hamoa due to EBUSY since upgrading 
from next-20251114 to next-20251118 or next-20251120:

[   11.748781] platform 
6800000.remoteproc:glink-edge:gpr:service at 1:dais: Adding to iommu group 30
[   11.785864] wsa_macro 6aa0000.codec: using zero-initialized flat 
cache, this may cause unexpected behavior
[   11.796964] reset-gpio reset-gpio.0: error -EBUSY: Could not get 
reset gpios
[   11.796984] reset-gpio reset-gpio.0: probe with driver reset-gpio 
failed with error -16
[   11.894662] reset-gpio reset-gpio.1: error -EBUSY: Could not get 
reset gpios
[   11.894676] reset-gpio reset-gpio.1: probe with driver reset-gpio 
failed with error -16
[   12.006938] wcd938x_codec audio-codec: bound sdw:2:0:0217:010d:00:4 
(ops wcd_sdw_component_ops [snd_soc_wcd_common])
[   12.006964] wcd938x_codec audio-codec: bound sdw:3:0:0217:010d:00:3 
(ops wcd_sdw_component_ops [snd_soc_wcd_common])
[   15.424657] qcom-soundwire 6ab0000.soundwire: qcom_swrm_irq_handler: 
SWR CMD error, fifo status 0x4e00c00f, flushing fifo
[   21.994354] qcom-soundwire 6ab0000.soundwire: qcom_swrm_irq_handler: 
SWR CMD error, fifo status 0xe00c000, flushing fifo
[   21.996001] qcom-soundwire 6b10000.soundwire: qcom_swrm_irq_handler: 
SWR CMD error, fifo status 0x4e00c00f, flushing fifo
[   21.996239] platform sound: deferred probe pending: snd-x1e80100: WSA 
Playback: codec dai not found
[   21.996248] soundwire sdw:4:0:0217:0204:00:0: deferred probe pending: 
wsa884x-codec: Failed to get reset
[   21.996250] soundwire sdw:4:0:0217:0204:00:1: deferred probe pending: 
wsa884x-codec: Failed to get reset
[   21.996251] soundwire sdw:1:0:0217:0204:00:0: deferred probe pending: 
wsa884x-codec: Failed to get reset
[   21.996253] soundwire sdw:1:0:0217:0204:00:1: deferred probe pending: 
wsa884x-codec: Failed to get reset

gpio_shared_proxy, reset_gpio, pinctrl_sm8550_lpass_lpi are all built as 
modules and were autoloaded fine.

This is wsa884x (not wsa881x nor wsa883x), failing in 
devm_reset_control_get_optional_shared..


Thanks,
~val