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| author | Guenter Roeck <linux@roeck-us.net> | 2013-02-21 10:27:54 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-20 13:10:55 -0700 |
| commit | d5100b3ba633d3128c6bc64637d971ea3f39d5e0 (patch) | |
| tree | 90b9e2e850b1a7a9366636310682993f45f4fbab | |
| parent | 7be4a00d5c4aaef6e47e8e4032aaf015e76ae6a4 (diff) | |
| download | lwn-d5100b3ba633d3128c6bc64637d971ea3f39d5e0.tar.gz lwn-d5100b3ba633d3128c6bc64637d971ea3f39d5e0.zip | |
hwmon: (pmbus/ltc2978) Fix temperature reporting
commit 8c958c703ef8804093437959221951eaf0e1e664 upstream.
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@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hwmon/pmbus/ltc2978.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index a58de38e23d8..6d6130752f94 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[2]; 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 +324,8 @@ static int ltc2978_probe(struct i2c_client *client, data->vin_min = 0x7bff; data->vin_max = 0x7c00; data->temp_min = 0x7bff; - data->temp_max = 0x7c00; + for (i = 0; i < ARRAY_SIZE(data->temp_max); i++) + data->temp_max[i] = 0x7c00; data->temp2_max = 0x7c00; switch (data->id) { |