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iio: light: vcnl4000: Fix scale for vcnl4040

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According to the data sheet the ambient sensor's scale is 0.12 lux/step
(not 0.024 lux/step as used by vcnl4200) when the integration time is
80ms. The integration time is currently hardcoded in the driver to that
value.

See p. 8 in https://www.vishay.com/docs/84307/designingvcnl4040.pdf

Fixes: 5a441aade5 ("iio: light: vcnl4000 add support for the VCNL4040 proximity and light sensor")
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guido Günther 2019-12-27 11:22:54 +01:00 committed by Greg Kroah-Hartman
parent 883f616530
commit bc80573ea2
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/light/vcnl4000.c
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@ -163,7 +163,6 @@ static int vcnl4200_init(struct vcnl4000_data *data)
if (ret < 0)
return ret;
data->al_scale = 24000;
data->vcnl4200_al.reg = VCNL4200_AL_DATA;
data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
switch (id) {
@ -172,11 +171,13 @@ static int vcnl4200_init(struct vcnl4000_data *data)
/* show 54ms in total. */
data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
data->al_scale = 24000;
break;
case VCNL4040_PROD_ID:
/* Integration time is 80ms, add 10ms. */
data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000);
data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000);
data->al_scale = 120000;
break;
}
data->vcnl4200_al.last_measurement = ktime_set(0, 0);