[PATCH RFC 0/7] regulator: new APIs for voltage reference supplies

David Lechner
2024-03-27T23:19:03Z

In the IIO subsystem, we noticed a pattern in many drivers where we need
to get, enable and get the voltage of a supply that provides a reference
voltage. In these cases, we only need the voltage and not a handle to
the regulator. Another common pattern is for chips to have an internal
reference voltage that is used when an external reference is not
available. There are also a few drivers outside of IIO that do the same.

So we would like to propose a couple of new regulator consumer APIs to
handle these specific cases to avoid repeating the same boilerplate code
in multiple drivers.

As an example of how these functions are used, I have included a few
patches to consumer drivers. But to avoid a giant patch bomb, I have
omitted the iio/adc and iio/dac patches I have prepared from this
series. I will send those separately but these will add 12 more users
of devm_regulator_get_enable_get_voltage() and 24 more users of
devm_regulator_get_optional_enable_get_voltage(). In total, this will
eliminate nearly 1000 lines of similar code.

---
David Lechner (7):
regulator: devres: add APIs for reference supplies
hwmon: (adc128d818) Use devm_regulator_get_optional_enable_get_voltage()
hwmon: (da9052) Use devm_regulator_get_enable_get_voltage()
iio: addac: ad74115: Use devm_regulator_get_enable_get_voltage()
iio: frequency: admv1013: Use devm_regulator_get_enable_get_voltage()
staging: iio: impedance-analyzer: admv1013: Use devm_regulator_get_enable_get_voltage()
Input: mpr121: Use devm_regulator_get_enable_get_voltage()

Documentation/driver-api/driver-model/devres.rst | 2 +
drivers/hwmon/adc128d818.c | 55 +++++-----------
drivers/hwmon/da9052-hwmon.c | 33 ++--------
drivers/iio/addac/ad74115.c | 28 +-------
drivers/iio/frequency/admv1013.c | 37 +++--------
drivers/input/keyboard/mpr121_touchkey.c | 45 +------------
drivers/regulator/devres.c | 83 ++++++++++++++++++++++++
drivers/staging/iio/impedance-analyzer/ad5933.c | 24 +------
include/linux/regulator/consumer.h | 14 ++++
9 files changed, 138 insertions(+), 183 deletions(-)
---
base-commit: c5b2db5859957150ac6ed305ab41a4a92ca40cfb
change-id: 20240326-regulator-get-enable-get-votlage-5dedf40ff338