diff options
| author | Oleg Safiullin <form@cvs.openbsd.org> | 2008-04-07 09:31:31 +0000 |
|---|---|---|
| committer | Oleg Safiullin <form@cvs.openbsd.org> | 2008-04-07 09:31:31 +0000 |
| commit | 7f29828b50f8587ff3245ec02cda13e4a73fc171 (patch) | |
| tree | 364dae9dac88fcddadeeaaf93eb2f9e49fbefd4f | |
| parent | c3ebff5ed216c15117eb782e1ba0b9da7c4be321 (diff) | |
some cosmetic changes
| -rw-r--r-- | sys/dev/isa/it.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/sys/dev/isa/it.c b/sys/dev/isa/it.c index 9484894d9e2..1389c0c61d5 100644 --- a/sys/dev/isa/it.c +++ b/sys/dev/isa/it.c @@ -1,4 +1,4 @@ -/* $OpenBSD: it.c,v 1.28 2008/04/03 20:28:05 form Exp $ */ +/* $OpenBSD: it.c,v 1.29 2008/04/07 09:31:30 form Exp $ */ /* * Copyright (c) 2007-2008 Oleg Safiullin <form@pdp-11.org.ru> @@ -59,6 +59,16 @@ void it_ec_refresh(void *arg); int it_wdog_cb(void *, int); +/* + * IT87-compatible chips can typically measure voltages up to 4.096 V. + * To measure higher voltages the input is attenuated with (external) + * resistors. Negative voltages are measured using a reference + * voltage. So we have to convert the sensor values back to real + * voltages by applying the appropriate resistor factor. + */ +#define RFACT_NONE 10000 +#define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) + struct { int type; @@ -89,13 +99,17 @@ struct { { SENSOR_VOLTS_DC, "VBAT" } }; -#define RFACT_NONE 10000 -#define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) - +/* rfact values for voltage sensors */ int it_vrfact[IT_VOLT_COUNT] = { - RFACT_NONE, RFACT_NONE, RFACT_NONE, RFACT(68, 100), RFACT(30, 10), - RFACT(21, 10), RFACT(83, 20), - RFACT(68, 100), RFACT_NONE + RFACT_NONE, /* VCORE_A */ + RFACT_NONE, /* VCORE_A */ + RFACT_NONE, /* +3.3V */ + RFACT(68, 100), /* +5V */ + RFACT(30, 10), /* +12V */ + RFACT(21, 10), /* -5V */ + RFACT(83, 20), /* -12V */ + RFACT(68, 100), /* +5VSB */ + RFACT_NONE /* VBAT */ }; LIST_HEAD(, it_softc) it_softc_list = LIST_HEAD_INITIALIZER(&it_softc_list); |