tree 57b1125972f5aa8f0a7528671c0209ae78107dac
parent 1e3842541db673c850625bfae4227fb88767a2a9
author Jayashree Dhanapal <jayashree-d@hcl.com> 1639475543 +0530
committer Zhikui Ren <zhikui.ren@intel.com> 1670629802 +0000

IpmbSensor:Add bus index for multiple IPMB bus

IPMB bus is a physical bus which is exposed using IPMB driver. IPMB
is an I2c based serial bus that interconnects the baseboard and
chassis management.

A BMC that includes IPMB interface support and also provides the
capability for system software to send and receive messages to
and from the IPMB using the BMC as a kind of communication
controller.

In OCP multi-host platform, multiple IPMB bus support is present.
Therefore, for each config, IPMB bus value will be passed from
entity-manager json config file.

Through this IPMB bus, BMC will send and receive messages and then
store the response for each configuration.

Example :
        {
            "Address": "0x01",
            "Bus": "$bus",
            "Name": "Temp_Sensor",
            "Type": "IpmbSensor"
        }

In the current patchset, only IPMB bus value is read and further
implementation using this value will be done in the following
patchset.

SDR Sensor :
 https://gerrit.openbmc-project.xyz/c/openbmc/dbus-sensors/+/52164
 https://gerrit.openbmc-project.xyz/c/openbmc/dbus-sensors/+/38905

IPMB GPIO State :
 https://gerrit.openbmc-project.xyz/c/openbmc/dbus-sensors/+/47952

TESTED: Tested on Facebook YosemiteV2 hardware and verified the
IPMB bus value.

Signed-off-by: Jayashree Dhanapal <jayashree-d@hcl.com>
Change-Id: I0a47057da98ee81471ac9f6fac69a036853db7d1