summaryrefslogtreecommitdiffstats
path: root/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm3222
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
new file mode 100644
index 0000000000..91439d6d60
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-dfsdm-adc-stm32
@@ -0,0 +1,22 @@
+What: /sys/bus/iio/devices/iio:deviceX/in_voltage_spi_clk_freq
+KernelVersion: 4.14
+Contact: arnaud.pouliquen@st.com
+Description:
+ For audio purpose only.
+
+ Used by audio driver to set/get the spi input frequency.
+
+ This is mandatory if DFSDM is slave on SPI bus, to
+ provide information on the SPI clock frequency during runtime
+ Notice that the SPI frequency should be a multiple of sample
+ frequency to ensure the precision.
+
+ if DFSDM input is SPI master:
+
+ Reading SPI clkout frequency,
+ error on writing
+
+ If DFSDM input is SPI Slave:
+
+ Reading returns value previously set.
+ Writing value before starting conversions.