https://github.com/torvalds/linux
Revision 347d7e45bd09ce09cbc30d5cea9de377eb22f55c authored by Stevens, Nick on 01 July 2015, 16:07:41 UTC, committed by Guenter Roeck on 01 July 2015, 20:56:27 UTC
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 <Nick.Stevens@digi.com> Cc: stable@vger.kernel.org # v3.10+ [Guenter Roeck: Dropped unnecessary value check] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1 parent 56172d8
Tip revision: 347d7e45bd09ce09cbc30d5cea9de377eb22f55c authored by Stevens, Nick on 01 July 2015, 16:07:41 UTC
hwmon: (mcp3021) Fix broken output scaling
hwmon: (mcp3021) Fix broken output scaling
Tip revision: 347d7e4
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| EDID | ||
| PCI | ||
| RCU | ||
| accounting | ||
| acpi | ||
| aoe | ||
| arm | ||
| arm64 | ||
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| cpu-freq | ||
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| i2c | ||
| ia64 | ||
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| infiniband | ||
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