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ARM: 9415/1: amba: Add dev_is_amba() function and export it for modules

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Add dev_is_amba() function to determine
whether the device is a AMBA device.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Kunwu Chan 2024-09-02 07:39:20 +01:00 • committed by Russell King (Oracle)
parent 9852d85ec9
commit ad8d1e323d
2 changed files with 11 additions and 0 deletions
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6
drivers/amba/bus.c
View file

@ -449,6 +449,12 @@ const struct bus_type amba_bustype = {
}; };
EXPORT_SYMBOL_GPL(amba_bustype); EXPORT_SYMBOL_GPL(amba_bustype);
bool dev_is_amba(const struct device *dev)
{
return dev->bus == &amba_bustype;
}
EXPORT_SYMBOL_GPL(dev_is_amba);
static int __init amba_init(void) static int __init amba_init(void)
{ {
return bus_register(&amba_bustype); return bus_register(&amba_bustype);

5
include/linux/amba/bus.h
View file

@ -121,6 +121,7 @@ extern const struct bus_type amba_bustype;
#ifdef CONFIG_ARM_AMBA #ifdef CONFIG_ARM_AMBA
int __amba_driver_register(struct amba_driver *, struct module *); int __amba_driver_register(struct amba_driver *, struct module *);
void amba_driver_unregister(struct amba_driver *); void amba_driver_unregister(struct amba_driver *);
bool dev_is_amba(const struct device *dev);
#else #else
static inline int __amba_driver_register(struct amba_driver *drv, static inline int __amba_driver_register(struct amba_driver *drv,
struct module *owner) struct module *owner)
@ -130,6 +131,10 @@ static inline int __amba_driver_register(struct amba_driver *drv,
static inline void amba_driver_unregister(struct amba_driver *drv) static inline void amba_driver_unregister(struct amba_driver *drv)
{ {
} }
static inline bool dev_is_amba(const struct device *dev)
{
return false;
}
#endif #endif
struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t); struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);