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staging: comedi: usbdux: tidy up usbdux_pwm_period()

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Rename the local variable used for the private data pointer to 'devpriv'.

Fix the fx2delay calculation so it does not use floating point values.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2013-07-29 17:44:14 -07:00
committed by Greg Kroah-Hartman
parent b509a76aff
commit 9fe4df4db1
1 changed files with 6 additions and 5 deletions
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11
drivers/staging/comedi/drivers/usbdux.c
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@@ -1347,20 +1347,21 @@ static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
}
static int usbdux_pwm_period(struct comedi_device *dev,
struct comedi_subdevice *s, unsigned int period)
struct comedi_subdevice *s,
unsigned int period)
{
struct usbdux_private *this_usbduxsub = dev->private;
struct usbdux_private *devpriv = dev->private;
int fx2delay = 255;
if (period < MIN_PWM_PERIOD) {
return -EAGAIN;
} else {
fx2delay = period / ((int)(6 * 512 * (1.0 / 0.033))) - 6;
fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
if (fx2delay > 255)
return -EAGAIN;
}
this_usbduxsub->pwm_delay = fx2delay;
this_usbduxsub->pwm_period = period;
devpriv->pwm_delay = fx2delay;
devpriv->pwm_period = period;
return 0;
}