to 2. maalisk. 2023 klo 12.59 Matti Vaittinen (mazziesaccount@xxxxxxxxx) kirjoitti: > > ROHM BU27034 is an ambient light sesnor 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. Additionally 3 IIO_INTENSITY channels are emitting the raw > register data from all diodes for more intense user-space > computations. > - Sensor has adjustible GAIN values ranging from 1x to 4096x. > - Sensor has adjustible measurement times 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 only can't provide requested > scale, adjusting both the time and the gain is > attempted. > - Driver exposes writable INT_TIME property which can be used > for adjusting the measurement time. Time adjustment will also > cause the driver to adjust the GAIN so that the overall scale > is not changed. > - Runtime PM is not implemented. > - Driver starts the measurement on the background when it is > probed. This improves the respnse time to read-requests Seems like I forgot to update the commit message. Note to self: change this when preparing the v3 ,,, > +config ROHM_BU27034 > + tristate "ROHM BU27034 ambient light sensor" > + depends on I2C > + select REGMAP_I2C > + select IIO_GTS_HELPER And, judging some other fixes - it seems this one would also need the select IIO_BUFFER and IIO_KFIFO_BUF now... -- Matti Vaittinen Linux kernel developer at ROHM Semiconductors Oulu Finland ~~ When things go utterly wrong vim users can always type :help! ~~ Discuss - Estimate - Plan - Report and finally accomplish this: void do_work(int time) __attribute__ ((const));
