diff options
author | Kumar Gala <galak@linen.sps.mot.com> | 2004-12-16 22:11:24 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <greg@kroah.com> | 2004-12-16 22:11:24 -0800 |
commit | b1cbc1086d663905c0e5775f3f5f28239f6c505e (patch) | |
tree | 3ae6366a4581629d64648a58853cb808c7498757 | |
parent | dd96557809ebcfaeb6055045c2e4ce8bddb5a1a3 (diff) | |
download | history-b1cbc1086d663905c0e5775f3f5f28239f6c505e.tar.gz |
[PATCH] Driver Core: Add platform_get_resource_byname & platform_get_resource_byirq
Adds the ability to find a resource or irq on a platform device by its
resource name. This patch also tweaks how resource names get set.
Before, resources names were set to pdev->dev.bus_id, now that only
happens if the resource name has not been previous set.
All of this allows us to find a resource without assuming what order the
resources are in.
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
-rw-r--r-- | drivers/base/platform.c | 40 | ||||
-rw-r--r-- | include/linux/device.h | 2 |
2 files changed, 41 insertions, 1 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 04451da003a6bb..3518207131145b 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -58,6 +58,41 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) } /** + * platform_get_resource_byname - get a resource for a device by name + * @dev: platform device + * @type: resource type + * @name: resource name + */ +struct resource * +platform_get_resource_byname(struct platform_device *dev, unsigned int type, + char *name) +{ + int i; + + for (i = 0; i < dev->num_resources; i++) { + struct resource *r = &dev->resource[i]; + + if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM| + IORESOURCE_IRQ|IORESOURCE_DMA)) == type) + if (!strcmp(r->name, name)) + return r; + } + return NULL; +} + +/** + * platform_get_irq - get an IRQ for a device + * @dev: platform device + * @name: IRQ name + */ +int platform_get_irq_byname(struct platform_device *dev, char *name) +{ + struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name); + + return r ? r->start : 0; +} + +/** * platform_add_devices - add a numbers of platform devices * @devs: array of platform devices to add * @num: number of platform devices in array @@ -103,7 +138,8 @@ int platform_device_register(struct platform_device * pdev) for (i = 0; i < pdev->num_resources; i++) { struct resource *p, *r = &pdev->resource[i]; - r->name = pdev->dev.bus_id; + if (r->name == NULL) + r->name = pdev->dev.bus_id; p = NULL; if (r->flags & IORESOURCE_MEM) @@ -308,3 +344,5 @@ EXPORT_SYMBOL_GPL(platform_device_register_simple); EXPORT_SYMBOL_GPL(platform_device_unregister); EXPORT_SYMBOL_GPL(platform_get_irq); EXPORT_SYMBOL_GPL(platform_get_resource); +EXPORT_SYMBOL_GPL(platform_get_irq_byname); +EXPORT_SYMBOL_GPL(platform_get_resource_byname); diff --git a/include/linux/device.h b/include/linux/device.h index c64cec37dd69d1..d885723a2c3aa6 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -382,6 +382,8 @@ extern struct device platform_bus; extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int); extern int platform_get_irq(struct platform_device *, unsigned int); +extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *); +extern int platform_get_irq_byname(struct platform_device *, char *); extern int platform_add_devices(struct platform_device **, int); extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int); |