Hi! When checking if a regulator supports a voltage range, the regulator needs to have support for listing the range or else -EINVAL will be returned. This support does not exist for the LTC2977 regulator, so this change adds support for list voltage to the pmbus regulators by adding regulator_list_voltage_linear to the pmbus_regulator_ops. It also defines the voltage resolution for regulators LTC2972/LTC2974/LTC2975/ LTC2977/LTC2978/LTC2979/LTC2980/LTM2987 based on that they all have the same stepwise 122.07uV resolution, and scales the resolution to a 1mV resolution which is easier to handle. These patches have been tested on an ARTPEC-8 developer board with a group of LTC2977 power regulators. Kind regards Mårten Lindahl Changes in v3: - Move read of low/high margins into local functions - Add check for invalid selector value - Introduce new macro PMBUS_REGULATOR_STEP(_name, _id, _voltages, _step) Changes in v2: - Correct #define format - Change dev_err to dev_warn - Add new pmbus_regulator_list_voltage function - Cache low/high vout margins Mårten Lindahl (3): hwmon: (pmbus) Introduce and use cached vout margins hwmon: (pmbus) Add list_voltage to pmbus ops hwmon: (pmbus/ltc2978) Set voltage resolution drivers/hwmon/pmbus/ltc2978.c | 44 +++++++++++-- drivers/hwmon/pmbus/pmbus.h | 8 ++- drivers/hwmon/pmbus/pmbus_core.c | 108 ++++++++++++++++++++++++++----- 3 files changed, 137 insertions(+), 23 deletions(-) -- 2.30.2
