diff options
| author | Alex Horn <alex.horn@cs.ox.ac.uk> | 2012-12-05 12:34:06 +0000 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2012-12-23 14:37:51 -0600 |
| commit | 2915efbfa8efadaa2806e827ba92b8dba4f7cd52 (patch) | |
| tree | c3887980d6b85ae57fb749ac3e0b74492c6cd7ed /hw/tmp105.c | |
| parent | eac236ea7bfc1902126be70459e320591078df5c (diff) | |
tmp105: Create API for TMP105 temperature sensor.
* Define enum for TMP105 registers
* Move tmp105_set() from I2C to TMP105 header
* Document units and range of temperature as preconditions
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alex Horn <alex.horn@cs.ox.ac.uk>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/tmp105.c')
| -rw-r--r-- | hw/tmp105.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/hw/tmp105.c b/hw/tmp105.c index 8e8dbd94eb..9c67e644dd 100644 --- a/hw/tmp105.c +++ b/hw/tmp105.c @@ -20,6 +20,7 @@ #include "hw.h" #include "i2c.h" +#include "tmp105.h" typedef struct { I2CSlave i2c; @@ -92,22 +93,22 @@ static void tmp105_read(TMP105State *s) } switch (s->pointer & 3) { - case 0: /* Temperature */ + case TMP105_REG_TEMPERATURE: s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8); s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) & (0xf0 << ((~s->config >> 5) & 3)); /* R */ break; - case 1: /* Configuration */ + case TMP105_REG_CONFIG: s->buf[s->len ++] = s->config; break; - case 2: /* T_LOW */ + case TMP105_REG_T_LOW: s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8; s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0; break; - case 3: /* T_HIGH */ + case TMP105_REG_T_HIGH: s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8; s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0; break; @@ -117,10 +118,10 @@ static void tmp105_read(TMP105State *s) static void tmp105_write(TMP105State *s) { switch (s->pointer & 3) { - case 0: /* Temperature */ + case TMP105_REG_TEMPERATURE: break; - case 1: /* Configuration */ + case TMP105_REG_CONFIG: if (s->buf[0] & ~s->config & (1 << 0)) /* SD */ printf("%s: TMP105 shutdown\n", __FUNCTION__); s->config = s->buf[0]; @@ -128,8 +129,8 @@ static void tmp105_write(TMP105State *s) tmp105_alarm_update(s); break; - case 2: /* T_LOW */ - case 3: /* T_HIGH */ + case TMP105_REG_T_LOW: + case TMP105_REG_T_HIGH: if (s->len >= 3) s->limit[s->pointer & 1] = (int16_t) ((((uint16_t) s->buf[0]) << 8) | s->buf[1]); |