diff options
| -rw-r--r-- | Documentation/hwmon/ads1015 | 8 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/hwmon/ads1015.c | 27 |
3 files changed, 29 insertions, 10 deletions
diff --git a/Documentation/hwmon/ads1015 b/Documentation/hwmon/ads1015 index f6fe9c2..063b80d 100644 --- a/Documentation/hwmon/ads1015 +++ b/Documentation/hwmon/ads1015 @@ -6,6 +6,10 @@ Supported chips: Prefix: 'ads1015' Datasheet: Publicly available at the Texas Instruments website : http://focus.ti.com/lit/ds/symlink/ads1015.pdf + * Texas Instruments ADS1115 + Prefix: 'ads1115' + Datasheet: Publicly available at the Texas Instruments website : + http://focus.ti.com/lit/ds/symlink/ads1115.pdf Authors: Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de> @@ -13,9 +17,9 @@ Authors: Description ----------- -This driver implements support for the Texas Instruments ADS1015. +This driver implements support for the Texas Instruments ADS1015/ADS1115. -This device is a 12-bit A-D converter with 4 inputs. +This device is a 12/16-bit A-D converter with 4 inputs. The inputs can be used single ended or in certain differential combinations. diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index e989f7f..47b3e58 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1202,8 +1202,8 @@ config SENSORS_ADS1015 tristate "Texas Instruments ADS1015" depends on I2C help - If you say yes here you get support for Texas Instruments ADS1015 - 12-bit 4-input ADC device. + If you say yes here you get support for Texas Instruments + ADS1015/ADS1115 12/16-bit 4-input ADC device. This driver can also be built as a module. If so, the module will be called ads1015. diff --git a/drivers/hwmon/ads1015.c b/drivers/hwmon/ads1015.c index 2798246..7f9dc2f 100644 --- a/drivers/hwmon/ads1015.c +++ b/drivers/hwmon/ads1015.c @@ -46,17 +46,28 @@ static const unsigned int fullscale_table[8] = { 6144, 4096, 2048, 1024, 512, 256, 256, 256 }; /* Data rates in samples per second */ -static const unsigned int data_rate_table[8] = { - 128, 250, 490, 920, 1600, 2400, 3300, 3300 }; +static const unsigned int data_rate_table_1015[8] = { + 128, 250, 490, 920, 1600, 2400, 3300, 3300 +}; + +static const unsigned int data_rate_table_1115[8] = { + 8, 16, 32, 64, 128, 250, 475, 860 +}; #define ADS1015_DEFAULT_CHANNELS 0xff #define ADS1015_DEFAULT_PGA 2 #define ADS1015_DEFAULT_DATA_RATE 4 +enum ads1015_chips { + ads1015, + ads1115, +}; + struct ads1015_data { struct device *hwmon_dev; struct mutex update_lock; /* mutex protect updates */ struct ads1015_channel_data channel_data[ADS1015_CHANNELS]; + enum ads1015_chips id; }; static int ads1015_read_adc(struct i2c_client *client, unsigned int channel) @@ -66,6 +77,8 @@ static int ads1015_read_adc(struct i2c_client *client, unsigned int channel) unsigned int pga = data->channel_data[channel].pga; unsigned int data_rate = data->channel_data[channel].data_rate; unsigned int conversion_time_ms; + const unsigned int * const rate_table = data->id == ads1115 ? + data_rate_table_1115 : data_rate_table_1015; int res; mutex_lock(&data->update_lock); @@ -75,7 +88,7 @@ static int ads1015_read_adc(struct i2c_client *client, unsigned int channel) if (res < 0) goto err_unlock; config = res; - conversion_time_ms = DIV_ROUND_UP(1000, data_rate_table[data_rate]); + conversion_time_ms = DIV_ROUND_UP(1000, rate_table[data_rate]); /* setup and start single conversion */ config &= 0x001f; @@ -113,8 +126,9 @@ static int ads1015_reg_to_mv(struct i2c_client *client, unsigned int channel, struct ads1015_data *data = i2c_get_clientdata(client); unsigned int pga = data->channel_data[channel].pga; int fullscale = fullscale_table[pga]; + const unsigned mask = data->id == ads1115 ? 0x7fff : 0x7ff0; - return DIV_ROUND_CLOSEST(reg * fullscale, 0x7ff0); + return DIV_ROUND_CLOSEST(reg * fullscale, mask); } /* sysfs callback function */ @@ -257,7 +271,7 @@ static int ads1015_probe(struct i2c_client *client, GFP_KERNEL); if (!data) return -ENOMEM; - + data->id = id->driver_data; i2c_set_clientdata(client, data); mutex_init(&data->update_lock); @@ -286,7 +300,8 @@ exit_remove: } static const struct i2c_device_id ads1015_id[] = { - { "ads1015", 0 }, + { "ads1015", ads1015}, + { "ads1115", ads1115}, { } }; MODULE_DEVICE_TABLE(i2c, ads1015_id); |