diff options
| author | Stevens, Nick <[email protected]> | 2015-07-01 16:07:41 +0000 |
|---|---|---|
| committer | Guenter Roeck <[email protected]> | 2015-07-01 13:56:27 -0700 |
| commit | 347d7e45bd09ce09cbc30d5cea9de377eb22f55c (patch) | |
| tree | 2372f376a79f0b97722a687de31a93af33ca3937 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 56172d81a9bc37a69b95dd627b8d48135c9c7b31 (diff) | |
hwmon: (mcp3021) Fix broken output scaling
The mcp3021 scaling code is dividing the VDD (full-scale) value in
millivolts by the A2D resolution to obtain the scaling factor. When VDD
is 3300mV (the standard value) and the resolution is 12-bit (4096
divisions), the result is a scale factor of 3300/4096, which is always
one. Effectively, the raw A2D reading is always being returned because
no scaling is applied.
This patch fixes the issue and simplifies the register-to-volts
calculation, removing the unneeded "output_scale" struct member.
Signed-off-by: Nick Stevens <[email protected]>
Cc: [email protected] # v3.10+
[Guenter Roeck: Dropped unnecessary value check]
Signed-off-by: Guenter Roeck <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions