lkml.org 
[lkml]   [2013]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/4] driver core: platform: allow platform drivers to bind to any device
Date
Platform drivers such as the vfio-platform "meta-" driver [1]
should be allowed to specify that they can bind to any device,
much like PCI drivers can with PCI_ANY_ID.

Currently, binding platform drivers to devices depends on:

- a string match in the device node's compatible entry (OF)
- a string match in the ACPI id list (ACPI)
- a string match in the id_table (platform data)
- a string match on the driver name (fall-back)

none of which allow for the notion of "match any."

This patch adds the notion by adding a "match any device" boolean to
struct platform_driver, for drivers to be able to set and thus not cause
platform_match() to fail when a bind is requested.

[1] http://www.spinics.net/lists/kvm/msg96701.html

Signed-off-by: Kim Phillips <kim.phillips@linaro.org>
---
drivers/base/platform.c | 4 ++++
include/linux/platform_device.h | 1 +
2 files changed, 5 insertions(+)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4f8bef3..0ca20d4 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -727,6 +727,10 @@ static int platform_match(struct device *dev, struct device_driver *drv)
struct platform_device *pdev = to_platform_device(dev);
struct platform_driver *pdrv = to_platform_driver(drv);

+ /* the driver matches any device */
+ if (pdrv->match_any_dev)
+ return 1;
+
/* Attempt an OF style match first */
if (of_driver_match_device(dev, drv))
return 1;
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index ce8e4ff..2d25d50 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -178,6 +178,7 @@ struct platform_driver {
int (*resume)(struct platform_device *);
struct device_driver driver;
const struct platform_device_id *id_table;
+ bool match_any_dev;
};

#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
--
1.8.4


\
 
 \ /
  Last update: 2013-10-11 08:41    [W:1.408 / U:0.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site