From: H Hartley Sweeten Date: Wed, 24 Jul 2013 21:09:51 +0000 (-0700) Subject: staging: comedi: usbdux: tidy up usbdux_attach_common() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=72db740fd9ddc5cf4fc487d42bbfbbb7dfc2e564;p=linux-beck.git staging: comedi: usbdux: tidy up usbdux_attach_common() Rename the local variable used for the device private data. Move the setting of the device private data 'comedidev' to the (*auto_attach) where the other back pointers are set. Tidy up the subdevice init by removing the unnecessary comments and adding some whitespace. Remove the unnecessary dev_info() after a sucessful attach. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c index f41b8361bee3..460c06683435 100644 --- a/drivers/staging/comedi/drivers/usbdux.c +++ b/drivers/staging/comedi/drivers/usbdux.c @@ -1952,123 +1952,82 @@ static int usbdux_pwm_config(struct comedi_device *dev, static int usbdux_attach_common(struct comedi_device *dev) { - struct usbdux_private *udev = dev->private; + struct usbdux_private *devpriv = dev->private; + struct comedi_subdevice *s; int ret; - struct comedi_subdevice *s = NULL; - int n_subdevs; - - down(&udev->sem); - /* pointer back to the corresponding comedi device */ - udev->comedidev = dev; - /* set number of subdevices */ - if (udev->high_speed) { - /* with pwm */ - n_subdevs = 5; - } else { - /* without pwm */ - n_subdevs = 4; - } + down(&devpriv->sem); - ret = comedi_alloc_subdevices(dev, n_subdevs); + ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4); if (ret) { - up(&udev->sem); + up(&devpriv->sem); return ret; } - /* the first subdevice is the A/D converter */ + /* Analog Input subdevice */ s = &dev->subdevices[SUBDEV_AD]; - /* the URBs get the comedi subdevice */ - /* which is responsible for reading */ - /* this is the subdevice which reads data */ dev->read_subdev = s; - /* the subdevice receives as private structure the */ - /* usb-structure */ - s->private = NULL; - /* analog input */ - s->type = COMEDI_SUBD_AI; - /* readable and ref is to ground */ - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; - /* 8 channels */ - s->n_chan = 8; - /* length of the channellist */ - s->len_chanlist = 8; - /* callback functions */ - s->insn_read = usbdux_ai_insn_read; - s->do_cmdtest = usbdux_ai_cmdtest; - s->do_cmd = usbdux_ai_cmd; - s->cancel = usbdux_ai_cancel; - /* max value from the A/D converter (12bit) */ - s->maxdata = 0xfff; - /* range table to convert to physical units */ - s->range_table = (&range_usbdux_ai_range); - - /* analog out */ + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; + s->n_chan = 8; + s->maxdata = 0x0fff; + s->len_chanlist = 8; + s->range_table = &range_usbdux_ai_range; + s->insn_read = usbdux_ai_insn_read; + s->do_cmdtest = usbdux_ai_cmdtest; + s->do_cmd = usbdux_ai_cmd; + s->cancel = usbdux_ai_cancel; + + /* Analog Output subdevice */ s = &dev->subdevices[SUBDEV_DA]; - /* analog out */ - s->type = COMEDI_SUBD_AO; - /* backward pointer */ dev->write_subdev = s; - /* the subdevice receives as private structure the */ - /* usb-structure */ - s->private = NULL; - /* are writable */ - s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; - /* 4 channels */ - s->n_chan = 4; - /* length of the channellist */ - s->len_chanlist = 4; - /* 12 bit resolution */ - s->maxdata = 0x0fff; - /* bipolar range */ - s->range_table = (&range_usbdux_ao_range); - /* callback */ - s->do_cmdtest = usbdux_ao_cmdtest; - s->do_cmd = usbdux_ao_cmd; - s->cancel = usbdux_ao_cancel; - s->insn_read = usbdux_ao_insn_read; - s->insn_write = usbdux_ao_insn_write; - - /* digital I/O */ + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; + s->n_chan = 4; + s->maxdata = 0x0fff; + s->len_chanlist = 4; + s->range_table = &range_usbdux_ao_range; + s->do_cmdtest = usbdux_ao_cmdtest; + s->do_cmd = usbdux_ao_cmd; + s->cancel = usbdux_ao_cancel; + s->insn_read = usbdux_ao_insn_read; + s->insn_write = usbdux_ao_insn_write; + + /* Digital I/O subdevice */ s = &dev->subdevices[SUBDEV_DIO]; - s->type = COMEDI_SUBD_DIO; - s->subdev_flags = SDF_READABLE | SDF_WRITABLE; - s->n_chan = 8; - s->maxdata = 1; - s->range_table = (&range_digital); - s->insn_bits = usbdux_dio_insn_bits; - s->insn_config = usbdux_dio_insn_config; - /* we don't use it */ - s->private = NULL; - - /* counter */ + s->type = COMEDI_SUBD_DIO; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE; + s->n_chan = 8; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = usbdux_dio_insn_bits; + s->insn_config = usbdux_dio_insn_config; + + /* Counter subdevice */ s = &dev->subdevices[SUBDEV_COUNTER]; - s->type = COMEDI_SUBD_COUNTER; - s->subdev_flags = SDF_WRITABLE | SDF_READABLE; - s->n_chan = 4; - s->maxdata = 0xFFFF; - s->insn_read = usbdux_counter_read; - s->insn_write = usbdux_counter_write; - s->insn_config = usbdux_counter_config; - - if (udev->high_speed) { - /* timer / pwm */ + s->type = COMEDI_SUBD_COUNTER; + s->subdev_flags = SDF_WRITABLE | SDF_READABLE; + s->n_chan = 4; + s->maxdata = 0xffff; + s->insn_read = usbdux_counter_read; + s->insn_write = usbdux_counter_write; + s->insn_config = usbdux_counter_config; + + if (devpriv->high_speed) { + /* PWM subdevice */ s = &dev->subdevices[SUBDEV_PWM]; - s->type = COMEDI_SUBD_PWM; - s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE; - s->n_chan = 8; - /* this defines the max duty cycle resolution */ - s->maxdata = udev->size_pwm_buf; - s->insn_write = usbdux_pwm_write; - s->insn_read = usbdux_pwm_read; - s->insn_config = usbdux_pwm_config; + s->type = COMEDI_SUBD_PWM; + s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE; + s->n_chan = 8; + s->maxdata = devpriv->size_pwm_buf; + 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); } - up(&udev->sem); - - dev_info(&udev->interface->dev, "comedi%d: attached to usbdux.\n", - dev->minor); + up(&devpriv->sem); return 0; } @@ -2238,6 +2197,7 @@ static int usbdux_auto_attach(struct comedi_device *dev, sema_init(&devpriv->sem, 1); + devpriv->comedidev = dev; devpriv->usbdev = usb; devpriv->interface = intf; devpriv->ifnum = intf->altsetting->desc.bInterfaceNumber;