From: Kunwu Chan <chentao@kylinos.cn>
Date: Mon, 2 Sep 2024 06:39:20 +0000 (+0100)
Subject: ARM: 9415/1: amba: Add dev_is_amba() function and export it for modules
X-Git-Tag: v6.13-rc1~36^2~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ad8d1e323dd37f91d0c973e2a74c7b9054219adc;p=thirdparty%2Fkernel%2Flinux.git

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

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>
---

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 0230c43377c1d..8ef259b4d0378 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -449,6 +449,12 @@ const struct bus_type 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)
 {
 	return bus_register(&amba_bustype);
diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index dda2f3ea89cb5..9946276aff737 100644
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -121,6 +121,7 @@ extern const struct bus_type amba_bustype;
 #ifdef CONFIG_ARM_AMBA
 int __amba_driver_register(struct amba_driver *, struct module *);
 void amba_driver_unregister(struct amba_driver *);
+bool dev_is_amba(const struct device *dev);
 #else
 static inline int __amba_driver_register(struct amba_driver *drv,
 					 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 bool dev_is_amba(const struct device *dev)
+{
+	return false;
+}
 #endif
 
 struct amba_device *amba_device_alloc(const char *, resource_size_t, size_t);