Add function for reading from counter subdevice.
Signed-off-by: Luca Ellero <luca.ellero@xxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_usb6501.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/staging/comedi/drivers/ni_usb6501.c b/drivers/staging/comedi/drivers/ni_usb6501.c
index 4e5afac..71631a7 100644
--- a/drivers/staging/comedi/drivers/ni_usb6501.c
+++ b/drivers/staging/comedi/drivers/ni_usb6501.c
@@ -467,6 +467,23 @@ static int ni6501_cnt_insn_config(struct comedi_device *dev,
return ret;
}
+static int ni6501_cnt_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ int ret;
+ u32 counter;
+
+ ret = ni6501_counter_command(dev, READ_COUNTER, &counter);
+ if (ret)
+ return ret;
+
+ data[0] = counter;
+
+ return insn->n;
+}
+
static int ni6501_alloc_usb_buffers(struct comedi_device *dev)
{
struct ni6501_private *devpriv = dev->private;
--
1.7.10.4
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