On 2013-11-17 03:42, Conrad Gomes wrote:
Hi,
No problem, I'll break this up and resend it.
In order to use dev_info type functions I was planning on assigning the
comedi device's struct device to the struct subdevice's class_dev as
follows in comedi_alloc_subdevices as it appears that is is not used(I
could be wrong):
diff --git a/drivers/staging/comedi/drivers.c
b/drivers/staging/comedi/drivers.c
index 8f02bf6..e4c44ae 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -90,6 +90,7 @@ int comedi_alloc_subdevices(struct comedi_device *dev,
int num_subdevices)
s->async_dma_dir = DMA_NONE;
spin_lock_init(&s->spin_lock);
s->minor = -1;
+ s->class_dev = dev->class_dev;
}
return 0;
}
The class_dev member is assigned by comedi_alloc_subdevice_minor(s)
(which will be called if the subdevice supports asynchronous comedi
commands) and is kept around for the call to comedi_free_subdevice_minor(s).
The struct comedi_subdevice has a pointer back to the struct
comedi_device. The class_dev member in the struct comedi_device can be
used as the device pointer parameter of dev_info() etc.
And adding a reference to the subdevice in the private data structure
unioxx5_subd_priv in order to substitute pr_info with dev_info. If this
is fine I'll remove all references of pr_info in the file:
diff --git a/drivers/staging/comedi/drivers/unioxx5.c
b/drivers/staging/comedi/drivers/unioxx5.c
index 2b1ece8..bb8f5a4 100644
--- a/drivers/staging/comedi/drivers/unioxx5.c
+++ b/drivers/staging/comedi/drivers/unioxx5.c
@@ -72,6 +72,7 @@ Devices: [Fastwel] UNIOxx-5 (unioxx5),
/* 'private' structure for each subdevice */
struct unioxx5_subd_priv {
+ struct comedi_subdevice *subdevice;
int usp_iobase;
/* 12 modules. each can be 70L or 73L */
unsigned char usp_module_type[12];
@@ -94,9 +95,10 @@ static int __unioxx5_define_chan_offset(int chan_num)
static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp,
int mode)
{
int i, mask;
+ struct device *dev = usp->subdevice->class_dev;
mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
- printk("COMEDI: mode = %d\n", mask);
+ dev_info(dev, "COMEDI: mode = %d\n", mask);
outb(1, usp->usp_iobase + 0);
It would be better to change those functions to pass the pointer to the
struct comedi_subdevice instead of the pointer to the struct
unioxx5_subd_priv.
A variable or parameter named 'dev' in the comedi drivers is usually of
type struct comedi_device for consistency.
The message passed to dev_info() wouldn't need the "COMEDI:" prefix -
it's redundant.
Also, this particular message should be a dev_dbg() at best, and
probably better not to have it at all!
For the sake of example, the above function could start as follows:
static void __unioxx5_digital_config(struct comedi_subdevice *s, int mode)
{
struct unioxx5_subd_priv *usp = s->private;
struct device *csdev = s->device->class_dev;
int i, mask;
mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
dev_dbg(csdev, "mode = %d\n", mask);
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-
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