Getting Information from Multiple nodes

[Praveen kumar]

Thanks Anish ..
I got your point .
I was using
struct inode *inode = file->f_dentry->d_inode;
 min = iminor(inode);

to see which node has been opened,
I wanted to make sure myself the correct/best way of
getting this information.

Praveen


On Wed, Nov 16, 2011 at 8:02 PM, anish kumar <anish198519851985 at gmail.com>wrote:

> On Wed, 2011-11-16 at 18:00 +0530, Praveen kumar wrote:
> > Hi All,
> >         I have a I2C chip driver,and there are two identical chips on
> > two different i2c bus.
> > I have registered the driver and initialized it and created two
> > nodes /dev/chip_0 and /dev/chip_1
> >
> > If I open the node from user how will I make driver identify which
> > device to access .ie in the ioctl.
>
> So in your ioctl call you want to get the device structure right?
> If yes then have a look at scull/main.c file in scull folder at below
> location.
> git://github.com/martinezjavier/ldd3.git
>
> Basically you need to set private_data of filp at open time with device
> information and get the private_data from filp in ioctl.
> If you don't understand then just have a look at the file I mentioned.
> >
> > Am I clear ???
> >
> > Praveen
> >
> >
> > _______________________________________________
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>
>
>
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