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@xxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
