tree a3df637ad7620319d4b7c4c2e8660d319b36e1c3
parent 7ee4d7e41d301c99cef377028264124fe35b7baa
author Shawn McCarney <shawnmm@us.ibm.com> 1638332218 -0600
committer Shawn McCarney <shawnmm@us.ibm.com> 1638335776 -0600

regulators: Enhance additional error data capture

Enhance the additional error data capture support to allow the same
register to be captured multiple times.

The additional error data is stored as key/value pairs.  The key format
is normally:

  <deviceID>_register_<register>

For example, "vdd1_register_0x7A".

If the same register is captured multiple times, a counter is appended
to make the key unique.  For example, "vdd1_register_0x7A_2".

One use case for capturing the same register multiple times is when a
voltage regulator produces multiple rails.  It may be necessary to do
the following:
* Set the PMBus PAGE to 0
* Capture a register for the first rail
* Set the PMBus PAGE to 1
* Capture the same register again for the second rail

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: I55c3e071b4b60e103f1de5778ede58b032ea29da