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authorJean Delvare <khali@linux-fr.org>2011-07-28 10:22:25 +0400
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-07-29 07:16:35 +0400
commita095f687f1e19c54147bd51f735717508a49e225 (patch)
tree2772a19fb7f61130e772f1364502e133f636cd18 /drivers/hwmon/lm90.c
parent03e9bd8dbcee60c2e22fd54f9f28f0d32da218c3 (diff)
downloadlinux-a095f687f1e19c54147bd51f735717508a49e225.tar.xz
hwmon: (lm90) Simplify handling of extended local temp register
The optional extended local temperature register can never have address 0, as this address is already used by another register. Thus we can get rid of flag LM90_HAVE_LOCAL_EXT and simply rely on reg_local_ext being non-zero to determine if a given chip has this extension or not. This makes the code more simple. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Stijn Devriendt <sdevrien@cisco.com> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers/hwmon/lm90.c')
-rw-r--r--drivers/hwmon/lm90.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 708bf0e7e4ac..7fef2a1194d9 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -170,7 +170,6 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
#define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
/* Device features */
#define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
-#define LM90_HAVE_LOCAL_EXT (1 << 2) /* extended local temperature */
#define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
#define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
#define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
@@ -214,8 +213,7 @@ struct lm90_params {
u16 alert_alarms; /* Which alarm bits trigger ALERT# */
/* Upper 8 bits for max6695/96 */
u8 max_convrate; /* Maximum conversion rate register value */
- u8 reg_local_ext; /* Local extension register if
- LM90_HAVE_LOCAL_EXT is set*/
+ u8 reg_local_ext; /* Extended local temp register (optional) */
};
static const struct lm90_params lm90_params[] = {
@@ -247,19 +245,17 @@ static const struct lm90_params lm90_params[] = {
.max_convrate = 9,
},
[max6646] = {
- .flags = LM90_HAVE_LOCAL_EXT,
.alert_alarms = 0x7c,
.max_convrate = 6,
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
},
[max6657] = {
- .flags = LM90_HAVE_LOCAL_EXT,
.alert_alarms = 0x7c,
.max_convrate = 8,
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
},
[max6659] = {
- .flags = LM90_HAVE_LOCAL_EXT | LM90_HAVE_EMERGENCY,
+ .flags = LM90_HAVE_EMERGENCY,
.alert_alarms = 0x7c,
.max_convrate = 8,
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
@@ -270,7 +266,7 @@ static const struct lm90_params lm90_params[] = {
.max_convrate = 7,
},
[max6696] = {
- .flags = LM90_HAVE_LOCAL_EXT | LM90_HAVE_EMERGENCY
+ .flags = LM90_HAVE_EMERGENCY
| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
.alert_alarms = 0x187c,
.max_convrate = 6,
@@ -282,8 +278,7 @@ static const struct lm90_params lm90_params[] = {
.max_convrate = 8,
},
[sa56004] = {
- .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
- | LM90_HAVE_LOCAL_EXT,
+ .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
.alert_alarms = 0x7b,
.max_convrate = 9,
.reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
@@ -476,7 +471,7 @@ static struct lm90_data *lm90_update_device(struct device *dev)
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]);
lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
- if (data->flags & LM90_HAVE_LOCAL_EXT) {
+ if (data->reg_local_ext) {
lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
data->reg_local_ext,
&data->temp11[4]);
@@ -1397,15 +1392,11 @@ static int lm90_probe(struct i2c_client *new_client,
/* Set chip capabilities */
data->flags = lm90_params[data->kind].flags;
+ data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
/* Set maximum conversion rate */
data->max_convrate = lm90_params[data->kind].max_convrate;
- if (data->flags & LM90_HAVE_LOCAL_EXT) {
- data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
- WARN_ON(data->reg_local_ext == 0);
- }
-
/* Initialize the LM90 chip */
lm90_init_client(new_client);