On Wed, May 27, 2015 at 7:47 AM, Stefan Agner <stefan@xxxxxxxx> wrote: > Support configurable conversion mode through sysfs. So far, the > mode used was low-power, which is enabled by default now. Beside > that, the modes normal and high-speed are selectable as well. > > Use the new device tree property which specifies the maximum ADC > conversion clock frequencies. Depending on the mode used, the > available resulting conversion frequency are calculated > dynamically. > > Acked-by: Fugang Duan <B38611@xxxxxxxxxxxxx> > Signed-off-by: Stefan Agner <stefan@xxxxxxxx> > --- > Documentation/ABI/testing/sysfs-bus-iio-vf610 | 7 + > .../devicetree/bindings/iio/adc/vf610-adc.txt | 9 ++ > drivers/iio/adc/vf610_adc.c | 146 +++++++++++++++------ > 3 files changed, 120 insertions(+), 42 deletions(-) > create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-vf610 > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio-vf610 b/Documentation/ABI/testing/sysfs-bus-iio-vf610 > new file mode 100644 > index 0000000..ecbc1f4 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-iio-vf610 > @@ -0,0 +1,7 @@ > +What: /sys/bus/iio/devices/iio:deviceX/conversion_mode > +KernelVersion: 4.2 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Specifies the hardware conversion mode used. The three > + available modes are "normal", "high-speed" and "low-power", > + where the last is the default mode. > diff --git a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt > index 1a4a43d..3eb40e2 100644 > --- a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt > +++ b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt > @@ -11,6 +11,13 @@ Required properties: > - clock-names: Must contain "adc", matching entry in the clocks property. > - vref-supply: The regulator supply ADC reference voltage. > > +Recommended properties: > +- fsl,adck-max-frequency: Maximum frequencies according to datasheets operating > + requirements. Three values are required, depending on conversion mode: > + - Frequency in normal mode (ADLPC=0, ADHSC=0) > + - Frequency in high-speed mode (ADLPC=0, ADHSC=1) > + - Frequency in low-power mode (ADLPC=1, ADHSC=0) Why is this "adck" rather than "adc"? How is this related to today's patch adding min-sample-time? Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
