* [PATCH v3 0/3] hwmon: (pmbus/ltc2978) Set voltage resolution
@ 2022-06-14 9:51 Mårten Lindahl
0 siblings, 0 replies; 2+ messages in thread
From: Mårten Lindahl @ 2022-06-14 9:51 UTC (permalink / raw)
To: Guenter Roeck, Jean Delvare; +Cc: linux-hwmon, kernel, Mårten Lindahl
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH v3 0/3] hwmon: (pmbus/ltc2978) Set voltage resolution
@ 2022-06-14 9:38 Mårten Lindahl
0 siblings, 0 replies; 2+ messages in thread
From: Mårten Lindahl @ 2022-06-14 9:38 UTC (permalink / raw)
To: Guenter Roeck, Jean Delvare; +Cc: linux-hwmon, kernel, Mårten Lindahl
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
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-06-14 9:38 Mårten Lindahl
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