psu-ng: Disable INPUT_HISTORY for 1400W IBM PSU
If the device driver is ibm-cpffps, read the MFR_POUT_MAX value
(max_power_out). Only enable INPUT_HISTORY data collection if it is not
the 1400W IBM power supply (MSB/LSB results in 30725 for 1400). The
1400W IBM power supply appears to cause problems on the bus when
an INPUT_HISTORY PMBus command read occurs.
Tested:
Simulated Rainier 2S4U
Fake 2nd and 3rd PSUs to return 1400W value
Verify 1st and 4th collecting INPUT_HISTORY
Verify 2nd and 3rd PSUs not getting INPUT_HISTORY collected
-----
Verify real Rainier 2S4U with 1600W working as expected.
Change-Id: Ia37cea9b0273ac5926e4bc581a2ea8a4079afa23
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/phosphor-power-supply/power_supply.hpp b/phosphor-power-supply/power_supply.hpp
index e342d72..48c0b5d 100644
--- a/phosphor-power-supply/power_supply.hpp
+++ b/phosphor-power-supply/power_supply.hpp
@@ -857,6 +857,16 @@
void inventoryAdded(sdbusplus::message::message& msg);
/**
+ * @brief Reads the pmbus MFR_POUT_MAX value.
+ *
+ * "The MFR_POUT_MAX command sets or retrieves the maximum rated output
+ * power, in watts, that the unit is rated to supply."
+ *
+ * @return max_power_out value converted from string.
+ */
+ auto getMaxPowerOut() const;
+
+ /**
* @brief Reads the most recent input history record from the power supply
* and updates the average and maximum properties in D-Bus if there is a new
* reading available.