On LTC2978, only READ_TEMPERATURE is supported. It reports
the internal junction temperature. This register is unpaged.
On LTC3880, READ_TEMPERATURE and READ_TEMPERATURE2 are supported.
READ_TEMPERATURE is paged and reports external temperatures.
READ_TEMPERATURE2 is unpaged and reports the internal junction
temperature.
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
Candidate for -stable.
v2: v1 converted temp2_max from an array to a scalar.
This is now done in an earlier patch.
drivers/hwmon/pmbus/ltc2978.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index a58de38..a729c1c 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -59,7 +59,7 @@ enum chips { ltc2978, ltc3880 };
struct ltc2978_data {
enum chips id;
int vin_min, vin_max;
- int temp_min, temp_max;
+ int temp_min, temp_max[8];
int vout_min[8], vout_max[8];
int iout_max[2];
int temp2_max;
@@ -113,9 +113,10 @@ static int ltc2978_read_word_data_common(struct i2c_client *client, int page,
ret = pmbus_read_word_data(client, page,
LTC2978_MFR_TEMPERATURE_PEAK);
if (ret >= 0) {
- if (lin11_to_val(ret) > lin11_to_val(data->temp_max))
- data->temp_max = ret;
- ret = data->temp_max;
+ if (lin11_to_val(ret)
+ > lin11_to_val(data->temp_max[page]))
+ data->temp_max[page] = ret;
+ ret = data->temp_max[page];
}
break;
case PMBUS_VIRT_RESET_VOUT_HISTORY:
@@ -266,7 +267,7 @@ static int ltc2978_write_word_data(struct i2c_client *client, int page,
break;
case PMBUS_VIRT_RESET_TEMP_HISTORY:
data->temp_min = 0x7bff;
- data->temp_max = 0x7c00;
+ data->temp_max[page] = 0x7c00;
ret = ltc2978_clear_peaks(client, page, data->id);
break;
default:
@@ -323,7 +324,6 @@ static int ltc2978_probe(struct i2c_client *client,
data->vin_min = 0x7bff;
data->vin_max = 0x7c00;
data->temp_min = 0x7bff;
- data->temp_max = 0x7c00;
data->temp2_max = 0x7c00;
switch (data->id) {
@@ -357,8 +357,10 @@ static int ltc2978_probe(struct i2c_client *client,
default:
return -ENODEV;
}
- for (i = 0; i < info->pages; i++)
+ for (i = 0; i < info->pages; i++) {
+ data->temp_max[i] = 0x7c00;
data->vout_min[i] = 0xffff;
+ }
return pmbus_do_probe(client, id, info);
}
--
1.7.9.7
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