On Tue, Sep 11, 2018 at 01:25:58PM -0700, Kun Yi wrote: > MAX31725/MAX31726 are local temperature sensors with +/- 0.5 degree > Celsius accuracy and 16-bit (0.00390625 degrees Celsius) resolution. > They have a register mapping and encoding compatible with the lm75 > series drivers. Address scan and extended temperature range are > not supported by this patch. > > Tested on real hardware and verified temperature readings are correct. > > Signed-off-by: Kun Yi <kunyi@xxxxxxxxxx> Applied to hwmon-next. Thanks, Guenter > --- > Documentation/hwmon/lm75 | 6 +++--- > drivers/hwmon/lm75.c | 18 ++++++++++++++++-- > 2 files changed, 19 insertions(+), 5 deletions(-) > > diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75 > index ac95edfcd907..2f1120f88c16 100644 > --- a/Documentation/hwmon/lm75 > +++ b/Documentation/hwmon/lm75 > @@ -17,8 +17,8 @@ Supported chips: > Addresses scanned: none > Datasheet: Publicly available at the Maxim website > http://www.maximintegrated.com/ > - * Maxim MAX6625, MAX6626 > - Prefixes: 'max6625', 'max6626' > + * Maxim MAX6625, MAX6626, MAX31725, MAX31726 > + Prefixes: 'max6625', 'max6626', 'max31725', 'max31726' > Addresses scanned: none > Datasheet: Publicly available at the Maxim website > http://www.maxim-ic.com/ > @@ -86,7 +86,7 @@ The LM75 is essentially an industry standard; there may be other > LM75 clones not listed here, with or without various enhancements, > that are supported. The clones are not detected by the driver, unless > they reproduce the exact register tricks of the original LM75, and must > -therefore be instantiated explicitly. Higher resolution up to 12-bit > +therefore be instantiated explicitly. Higher resolution up to 16-bit > is supported by this driver, other specific enhancements are not. > > The LM77 is not supported, contrary to what we pretended for a long time. > diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c > index 49f4b33a5685..e6e5a1080f09 100644 > --- a/drivers/hwmon/lm75.c > +++ b/drivers/hwmon/lm75.c > @@ -47,6 +47,7 @@ enum lm75_type { /* keep sorted in alphabetical order */ > lm75b, > max6625, > max6626, > + max31725, > mcp980x, > stds75, > tcn75, > @@ -64,7 +65,6 @@ enum lm75_type { /* keep sorted in alphabetical order */ > static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c, > 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; > > - > /* The LM75 registers */ > #define LM75_REG_TEMP 0x00 > #define LM75_REG_CONF 0x01 > @@ -76,7 +76,7 @@ struct lm75_data { > struct i2c_client *client; > struct regmap *regmap; > u8 orig_conf; > - u8 resolution; /* In bits, between 9 and 12 */ > + u8 resolution; /* In bits, between 9 and 16 */ > u8 resolution_limits; > unsigned int sample_time; /* In ms */ > }; > @@ -339,6 +339,10 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id) > data->resolution_limits = 9; > data->sample_time = MSEC_PER_SEC / 4; > break; > + case max31725: > + data->resolution = 16; > + data->sample_time = MSEC_PER_SEC / 8; > + break; > case tcn75: > data->resolution = 9; > data->sample_time = MSEC_PER_SEC / 8; > @@ -415,6 +419,8 @@ static const struct i2c_device_id lm75_ids[] = { > { "lm75b", lm75b, }, > { "max6625", max6625, }, > { "max6626", max6626, }, > + { "max31725", max31725, }, > + { "max31726", max31725, }, > { "mcp980x", mcp980x, }, > { "stds75", stds75, }, > { "tcn75", tcn75, }, > @@ -471,6 +477,14 @@ static const struct of_device_id lm75_of_match[] = { > .compatible = "maxim,max6626", > .data = (void *)max6626 > }, > + { > + .compatible = "maxim,max31725", > + .data = (void *)max31725 > + }, > + { > + .compatible = "maxim,max31726", > + .data = (void *)max31725 > + }, > { > .compatible = "maxim,mcp980x", > .data = (void *)mcp980x > -- > 2.19.0.rc2.392.g5ba43deb5a-goog >
