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| author | Martyn Welch <martyn.welch@collabora.co.uk> | 2017-10-19 16:51:44 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2017-10-21 09:03:29 -0700 |
| commit | b16918a5fd87983d421a7e2241a1314e877c4ea2 (patch) | |
| tree | dedd75860f16877654114ed7cf3784b1514ce1bd /drivers/hwmon/tmp102.c | |
| parent | 8a5776a5f49812d29fe4b2d0a2d71675c3facf3f (diff) | |
| download | linux-next-b16918a5fd87983d421a7e2241a1314e877c4ea2.tar.gz | |
hwmon: (da9052) Increase sample rate when using TSI
The TSI channel, which is usually used for touchscreen support, but can
be used as 4 general purpose ADCs. When used as a touchscreen interface
the touchscreen driver switches the device into 1ms sampling mode (rather
than the default 10ms economy mode) as recommended by the manufacturer.
When using the TSI channels as a general purpose ADC we are currently not
doing this and testing suggests that this can result in ADC timeouts:
[ 5827.198289] da9052 spi2.0: timeout waiting for ADC conversion interrupt
[ 5827.728293] da9052 spi2.0: timeout waiting for ADC conversion interrupt
[ 5993.808335] da9052 spi2.0: timeout waiting for ADC conversion interrupt
[ 5994.328441] da9052 spi2.0: timeout waiting for ADC conversion interrupt
[ 5994.848291] da9052 spi2.0: timeout waiting for ADC conversion interrupt
Switching to the 1ms timing resolves this issue.
Fixes: 4f16cab19a3d5 ("hwmon: da9052: Add support for TSI channel")
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Acked-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/tmp102.c')
0 files changed, 0 insertions, 0 deletions