From 7c4ede3a6baa640393c7e98f9271c6c282a02f1e Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 10 Feb 2014 11:49:20 -0700 Subject: [PATCH] staging: comedi: dt2811: use comedi_timeout() Use comedi_timeout() to wait for the analog input end-of-conversion. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/dt2811.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/staging/comedi/drivers/dt2811.c b/drivers/staging/comedi/drivers/dt2811.c index 4271903facd7..ba7c2ba618e6 100644 --- a/drivers/staging/comedi/drivers/dt2811.c +++ b/drivers/staging/comedi/drivers/dt2811.c @@ -224,23 +224,32 @@ static const struct comedi_lrange *dac_range_types[] = { &range_unipolar5 }; -#define DT2811_TIMEOUT 5 +static int dt2811_ai_eoc(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned long context) +{ + unsigned int status; + + status = inb(dev->iobase + DT2811_ADCSR); + if ((status & DT2811_ADBUSY) == 0) + return 0; + return -EBUSY; +} static int dt2811_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { int chan = CR_CHAN(insn->chanspec); - int timeout = DT2811_TIMEOUT; + int ret; int i; for (i = 0; i < insn->n; i++) { outb(chan, dev->iobase + DT2811_ADGCR); - while (timeout - && inb(dev->iobase + DT2811_ADCSR) & DT2811_ADBUSY) - timeout--; - if (!timeout) - return -ETIME; + ret = comedi_timeout(dev, s, insn, dt2811_ai_eoc, 0); + if (ret) + return ret; data[i] = inb(dev->iobase + DT2811_ADDATLO); data[i] |= inb(dev->iobase + DT2811_ADDATHI) << 8; -- 2.11.0