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staging: comedi: usbdux: remove usbdux_pwm_read() 

The pwm subdevice is not readable so this callback function is not
needed. Remove it.

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 17:45:09 -07:00 committed by Greg Kroah-Hartman
parent 5c63f094a7
commit 64ffc665d7
1 changed files with 0 additions and 9 deletions
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9
drivers/staging/comedi/drivers/usbdux.c
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@ -1445,14 +1445,6 @@ static int usbdux_pwm_write(struct comedi_device *dev,
return usbdux_pwm_pattern(dev, s, chan, data[0], 0);
}
static int usbdux_pwm_read(struct comedi_device *x1,
struct comedi_subdevice *x2, struct comedi_insn *x3,
unsigned int *x4)
{
/* not needed */
return -EINVAL;
};
/* switches on/off PWM */
static int usbdux_pwm_config(struct comedi_device *dev,
struct comedi_subdevice *s,
@ -1819,7 +1811,6 @@ static int usbdux_auto_attach(struct comedi_device *dev,
s->n_chan = 8;
s->maxdata = devpriv->pwm_buf_sz;
s->insn_write = usbdux_pwm_write;
s->insn_read = usbdux_pwm_read;
s->insn_config = usbdux_pwm_config;
usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);