kernel/drivers/iio/light/Kconfig, branch linux-6.9.y

iio: light: as73211: add support for as7331

2024-01-22T18:58:44Z

The AMS AS7331 is a UV light sensor with three channels: UVA, UVB and UVC (also known as deep UV and referenced as DUV in the iio core). Its internal structure and forming blocks are practically identical to the ones the AS73211 contains: API, internal DAC, I2C interface and registers, measurement modes, number of channels and pinout. The only difference between them is the photodiodes used to acquire light, which means that only some modifications are required to add support for the AS7331 in the existing driver. The temperature channel is identical for both devices and only the channel modifiers of the IIO_INTENSITY channels need to account for the device type. The scale values have been obtained from the chapter "7.5 Transfer Function" of the official datasheet[1] for the configuration chosen as basis (Nclk = 1024 and GAIN = 1). Those values keep the units from the datasheet (nW/cm^2), as opposed to the units used for the AS73211 (nW/m^2). Add a new device-specific data structure to account for the device differences: channel types and scale of LSB per channel. [1] https://ams.com/documents/20143/9106314/AS7331_DS001047_4-00.pdf Tested-by: Christian Eggers Signed-off-by: Javier Carrasco Signed-off-by: Jonathan Cameron

iio: light: driver for Lite-On ltr390

2023-12-11T19:16:35Z

Implements driver for the Ambient/UV Light sensor LTR390. The driver exposes two ways of getting sensor readings: 1. Raw UV Counts directly from the sensor 2. The computed UV Index value with a percision of 2 decimal places [NOTE] Ambient light sensing has not been implemented yet. Driver tested on RPi Zero 2W Datasheet: https://optoelectronics.liteon.com/upload/download/DS86-2015-0004/LTR-390UV_Final_%20DS_V1%201.pdf Signed-off-by: Anshul Dalal Link: https://lore.kernel.org/r/20231208102211.413019-2-anshulusr@gmail.com Signed-off-by: Jonathan Cameron

iio: light: isl76682: Add ISL76682 driver

2023-12-06T17:19:52Z

The ISL76682 is very basic ALS which only supports ALS or IR mode in four ranges, 1k/4k/16k/64k LUX. There is no IRQ support or any other fancy functionality. Reviewed-by: Andy Shevchenko Reviewed-by: Matti Vaittinen Signed-off-by: Marek Vasut Link: https://lore.kernel.org/r/20231127212726.77707-2-marex@denx.de Signed-off-by: Jonathan Cameron

iio: light: add VEML6075 UVA and UVB light sensor driver

2023-12-04T13:57:25Z

The Vishay VEMl6075 is a low power, 16-bit resolution UVA and UVB light sensor with I2C interface and noise compensation (visible and infrarred). Every UV channel generates an output signal measured in counts per integration period, where the integration time is configurable. This driver adds support for both UV channels and the ultraviolet index (UVI) inferred from them according to the device application note with open-air (no teflon) coefficients. Signed-off-by: Javier Carrasco Link: https://lore.kernel.org/r/20231110-veml6075-v3-3-6ee46775b422@gmail.com Signed-off-by: Jonathan Cameron

iio: light: ROHM BU27008 color sensor

2023-05-23T20:20:17Z

The ROHM BU27008 is a sensor with 5 photodiodes (red, green, blue, clear and IR) with four configurable channels. Red and green being always available and two out of the rest three (blue, clear, IR) can be selected to be simultaneously measured. Typical application is adjusting LCD backlight of TVs, mobile phones and tablet PCs. Add initial support for the ROHM BU27008 color sensor. - raw_read() of RGB and clear channels - triggered buffer w/ DRDY interrtupt Signed-off-by: Matti Vaittinen Link: https://lore.kernel.org/r/2594162f0e44148cffb1fb05f1d6edfde6bd11bc.1683541225.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron

iio: light: Add support for TI OPT4001 light sensor

2023-05-13T16:56:06Z

This driver uses the continuous mode of the chip and integration time can be configured through sysfs. The constants for calculating lux value differs between packaging so it uses different compatible string for the two versions "ti,opt4001-picostar" and "ti,opt4001-sot-5x3" since the device id is the same. Datasheet: https://www.ti.com/lit/gpn/opt4001 Signed-off-by: Stefan Windfeldt-Prytz Link: https://lore.kernel.org/r/20230323-add-opt4001-driver-v3-2-62e121dab294@axis.com Signed-off-by: Jonathan Cameron

iio: light: ROHM BU27034 Ambient Light Sensor

2023-04-10T11:26:35Z

ROHM BU27034 is an ambient light sensor with 3 channels and 3 photo diodes capable of detecting a very wide range of illuminance. Typical application is adjusting LCD and backlight power of TVs and mobile phones. Add initial support for the ROHM BU27034 ambient light sensor. NOTE: - Driver exposes 4 channels. One IIO_LIGHT channel providing the calculated lux values based on measured data from diodes #0 and #1. In addition, 3 IIO_INTENSITY channels are emitting the raw register data from all diodes for more intense user-space computations. - Sensor has GAIN values that can be adjusted from 1x to 4096x. - Sensor has adjustible measurement times of 5, 55, 100, 200 and 400 mS. Driver does not support 5 mS which has special limitations. - Driver exposes standard 'scale' adjustment which is implemented by: 1) Trying to adjust only the GAIN 2) If GAIN adjustment alone can't provide requested scale, adjusting both the time and the gain is attempted. - Driver exposes writable INT_TIME property that can be used for adjusting the measurement time. Time adjustment will also cause the driver to try to adjust the GAIN so that the overall scale is kept as close to the original as possible. Signed-off-by: Matti Vaittinen Link: https://lore.kernel.org/r/2a7efb6f335da5526fbe34b95137c5e45db5c5d3.1680263956.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron

iio: light: rpr0521: add missing Kconfig dependencies

2022-11-12T17:36:02Z

Fix an implicit declaration of function error for rpr0521 under some configs When CONFIG_RPR0521 is enabled without CONFIG_IIO_TRIGGERED_BUFFER, the build results in "implicit declaration of function" errors, e.g., drivers/iio/light/rpr0521.c:434:3: error: implicit declaration of function 'iio_trigger_poll_chained' [-Werror=implicit-function-declaration] 434 | iio_trigger_poll_chained(data->drdy_trigger0); | ^~~~~~~~~~~~~~~~~~~~~~~~ This fix adds select dependencies to RPR0521's configuration declaration. Fixes: e12ffd241c00 ("iio: light: rpr0521 triggered buffer") Signed-off-by: Paul Gazzillo Link: https://bugzilla.kernel.org/show_bug.cgi?id=216678 Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20221110214729.ls5ixav5kxpeftk7@device Signed-off-by: Jonathan Cameron

iio: light: Add support for ltrf216a sensor

2022-08-15T21:29:57Z

Add initial support for ltrf216a ambient light sensor. Datasheet: https://gitlab.collabora.com/shreeya/iio/-/blob/master/LTRF216A.pdf Reviewed-by: Andy Shevchenko Co-developed-by: Zhigang Shi Signed-off-by: Zhigang Shi Co-developed-by: Dmitry Osipenko Signed-off-by: Dmitry Osipenko Signed-off-by: Shreeya Patel Link: https://lore.kernel.org/r/20220725104050.491396-3-shreeya.patel@collabora.com Signed-off-by: Jonathan Cameron

iio: light: cm3605: Drop dependency on OF

2022-04-28T18:22:55Z

Nothing in this driver depends on OF firmware so drop the dependency to remove the false impression such a dependency exists. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20220413184627.21125-1-andriy.shevchenko@linux.intel.com Signed-off-by: Jonathan Cameron