diff options
| author | Eugen Hristev <eugen.hristev@microchip.com> | 2017-11-15 14:56:47 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-12-02 10:39:43 +0000 |
| commit | 073c662017f2f3ea693bb31e4f5d2332265f1de0 (patch) | |
| tree | 6f0be628485f5a9624ff53567fc577e30ed96dfd /drivers/iio/adc/Kconfig | |
| parent | 16ba0dc6eaf4d152126a855bc5c9a31f05abadb4 (diff) | |
iio: adc: at91-sama5d2_adc: add support for DMA
Added support for DMA transfers. The implementation uses the user watermark
to decide whether DMA will be used or not. For watermark 1, DMA will not be
used. If watermark is bigger, DMA will be used.
Sysfs attributes are created to indicate whether the DMA is used,
with hwfifo_enabled, and the current DMA watermark is readable
in hwfifo_watermark. Minimum and maximum values are in hwfifo_watermark_min
and hwfifo_watermark_max.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/adc/Kconfig')
| -rw-r--r-- | drivers/iio/adc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index ef86296b8b0d..486793691de0 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -158,6 +158,7 @@ config AT91_SAMA5D2_ADC tristate "Atmel AT91 SAMA5D2 ADC" depends on ARCH_AT91 || COMPILE_TEST depends on HAS_IOMEM + depends on HAS_DMA select IIO_TRIGGERED_BUFFER help Say yes here to build support for Atmel SAMA5D2 ADC which is |