diff options
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/ads1015 | 74 |
1 files changed, 44 insertions, 30 deletions
diff --git a/Documentation/hwmon/ads1015 b/Documentation/hwmon/ads1015 index 02d2a459385f..e0951c4e57bb 100644 --- a/Documentation/hwmon/ads1015 +++ b/Documentation/hwmon/ads1015 @@ -2,17 +2,25 @@ Kernel driver ads1015 ===================== Supported chips: + * Texas Instruments ADS1015 + Prefix: 'ads1015' - Datasheet: Publicly available at the Texas Instruments website : - http://focus.ti.com/lit/ds/symlink/ads1015.pdf + + 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 + + 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> + Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de> Description ----------- @@ -24,14 +32,15 @@ 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. The inputs can be made available by 8 sysfs input files in0_input - in7_input: -in0: Voltage over AIN0 and AIN1. -in1: Voltage over AIN0 and AIN3. -in2: Voltage over AIN1 and AIN3. -in3: Voltage over AIN2 and AIN3. -in4: Voltage over AIN0 and GND. -in5: Voltage over AIN1 and GND. -in6: Voltage over AIN2 and GND. -in7: Voltage over AIN3 and GND. + + - in0: Voltage over AIN0 and AIN1. + - in1: Voltage over AIN0 and AIN3. + - in2: Voltage over AIN1 and AIN3. + - in3: Voltage over AIN2 and AIN3. + - in4: Voltage over AIN0 and GND. + - in5: Voltage over AIN1 and GND. + - in6: Voltage over AIN2 and GND. + - in7: Voltage over AIN3 and GND. Which inputs are available can be configured using platform data or devicetree. @@ -42,29 +51,34 @@ Platform Data In linux/platform_data/ads1015.h platform data is defined, channel_data contains configuration data for the used input combinations: + - pga is the programmable gain amplifier (values are full scale) - 0: +/- 6.144 V - 1: +/- 4.096 V - 2: +/- 2.048 V - 3: +/- 1.024 V - 4: +/- 0.512 V - 5: +/- 0.256 V + + - 0: +/- 6.144 V + - 1: +/- 4.096 V + - 2: +/- 2.048 V + - 3: +/- 1.024 V + - 4: +/- 0.512 V + - 5: +/- 0.256 V + - data_rate in samples per second - 0: 128 - 1: 250 - 2: 490 - 3: 920 - 4: 1600 - 5: 2400 - 6: 3300 - -Example: -struct ads1015_platform_data data = { + + - 0: 128 + - 1: 250 + - 2: 490 + - 3: 920 + - 4: 1600 + - 5: 2400 + - 6: 3300 + +Example:: + + struct ads1015_platform_data data = { .channel_data = { [2] = { .enabled = true, .pga = 1, .data_rate = 0 }, [4] = { .enabled = true, .pga = 4, .data_rate = 5 }, } -}; + }; In this case only in2_input (FS +/- 4.096 V, 128 SPS) and in4_input (FS +/- 0.512 V, 2400 SPS) would be created. |