Some PMBus chips don't respond with valid data when reading the CAPABILITY register. For instance the register may report that the chip supports PEC when in reality it does not. For such chips, PEC must not be enabled while probing the chip, so this series adds a flag that allows device drivers to force PEC off. The second patch enables this flag for the IBM CFFPS driver, which supports power supplies that report invalid in the CAPABILITY register and must therefore force PEC off. Eddie James (2): hwmon: (pmbus) Add a NO_PEC flag to probe chips with faulty CAPABILITY hwmon: (pmbus/ibm-cffps) Set the PMBUS_NO_PEC flag drivers/hwmon/pmbus/ibm-cffps.c | 2 +- drivers/hwmon/pmbus/pmbus_core.c | 8 +++++--- include/linux/pmbus.h | 10 ++++++++++ 3 files changed, 16 insertions(+), 4 deletions(-) -- 2.27.0
