Recent kernel commit breaks battery sensing

[Andy Green]

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Somebody in the thread at some point said:
| Hi,
|  the recent kernel commit
|
|    commit b9de904e7aadd7b37c4035fd5d6f59e5f80089b6
|
| removes the line
|
| -#define HDQ_SAMPLE_PERIOD_US   20
|
| from drivers/power/hdq.c
| So HDQ_SAMPLE_PERIOD_US gets the value '10' from include/linux/hdq.h
|
| In hdq.c there is a line
|
| 		hdq_priv.hdq_ctr = 3000 / HDQ_SAMPLE_PERIOD_US;
|
| which previously resulted in 150, and now results in 300.
|
| As hdq_ctr is an 8 bit value we lose something, and the compiler
| complains.
| Also I cannot read most values from /sys/class/power_supply/battery
| I get an error Timer expired.
|
| Restoring the #define makes my battery status visible again, but I
| don't know if that is the right fix...

This is my fault, I fixed it on andy-tracking by reducing the 3ms
timeout to 2.5ms with a reported-by for yourself.

Nice work tracking it down to the actual cause anyway!

- -Andy
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