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parport->dev driver model support

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Currently a parport_driver can't get a handle on the device node for the
underlying parport (PNPACPI, PCI, etc).  That prevents correct placement of
sysfs child nodes, which can affect things like power management.

This patch adds a field to "struct parport" pointing to that device node, and
updates non-legacy port drivers to initialize that device pointer.  That field
replaces the analagous PCI-only support in parport_pc.

[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Brownell 2007-05-08 00:27:35 -07:00 • committed by Linus Torvalds
parent d2d9433a4c
commit c15a3837d2
9 changed files with 33 additions and 25 deletions
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8
include/linux/parport.h
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@ -279,6 +279,10 @@ struct parport {
int dma;
int muxport; /* which muxport (if any) this is */
int portnum; /* which physical parallel port (not mux) */
struct device *dev; /* Physical device associated with IO/DMA.
* This may unfortulately be null if the
* port has a legacy driver.
*/
struct parport *physport;
/* If this is a non-default mux
@ -289,7 +293,7 @@ struct parport {
following structure members are
meaningless: devices, cad, muxsel,
waithead, waittail, flags, pdir,
ieee1284, *_lock.
dev, ieee1284, *_lock.
It this is a default mux parport, or
there is no mux involved, this points to
@ -302,7 +306,7 @@ struct parport {
struct pardevice *waithead;
struct pardevice *waittail;
struct list_head list;
unsigned int flags;