[PATCH v4 0/4] ti-ads7950: fix gpio handling and facelift

[Dmitry Torokhov]

The original reason for this series is to make sure ti_ads7950_get()
returns result in range [0, 1] or a negative error code to comply with
gpiolib requirement.

During review David noticed the fact that the function also clobbers
gpio state. Fixing that lead to adding cleanups using guard() and devm.

---
Changes in v4:
- rebased on top of latest next
- dropped the 2 already applied patches
- restored inadvertently removed mutex_init() (Andy)
- stopped calling devm_regulator_get_enable_read_voltage() on ACPI
  systems as it is guaranteed to fail (David, Jonathan)
- removed call to spi_set_drvdata() since it is not needed anymore (David)
- Link to v3: https://patch.msgid.link/20260305-ti-ads7950-facelift-v3-0-a23fdd1a079e@xxxxxxxxx

Changes in v3:

- Added "Fixes" tags
- Picked up reviewed-by tags for #1 and #2
- Dropped the conversion to "error" variables
- Avoid using scoped_guard (per David)
- directly return results of function calls at the end of function (David)
- Split spi_sync() error handling into a new patxch (Andy)
- Switch to using devm_regulator_get_enable_read_voltage() (David)

Changes in v2:

- style fixes in #1 (per David)
- fix to not clobber state (#2, new)
- #3 and #4 (new)

---
Dmitry Torokhov (4):
      iio: adc: ti-ads7950: switch to using guard() notation
      iio: adc: ti-ads7950: simplify check for spi_setup() failures
      iio: adc: ti-ads7950: switch to using devm_regulator_get_enable_read_voltage()
      iio: adc: ti-ads7950: complete conversion to using managed resources

 drivers/iio/adc/ti-ads7950.c | 195 ++++++++++++++-----------------------------
 1 file changed, 62 insertions(+), 133 deletions(-)
---
base-commit: 3b058d1aeeeff27a7289529c4944291613b364e9
change-id: 20260220-ti-ads7950-facelift-ad8b5390a654

Thanks.

-- 
Dmitry