diff mbox series

[6/8] dm: Introduce dev_phys_to_bus()/dev_bus_to_phys()

Message ID 20201119174820.7820-7-nsaenzjulienne@suse.de
State Superseded
Delegated to: Matthias Brugger
Headers show
Series [1/8] rpi: Add identifier for the new RPi400 | expand

Commit Message

Nicolas Saenz Julienne Nov. 19, 2020, 5:48 p.m. UTC 
These functions, instead of relying on hard-coded platform-specific
address translations, make use of the DMA constraints provided by the DM
core. This allows for per-device translations.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 include/phys2bus.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/include/phys2bus.h b/include/phys2bus.h
index dc9b8e5a25..a380063af4 100644
--- a/include/phys2bus.h
+++ b/include/phys2bus.h
@@ -21,4 +21,20 @@  static inline unsigned long bus_to_phys(unsigned long bus)
 }
 #endif
 
+#if CONFIG_IS_ENABLED(DM)
+#include <dm/device.h>
+
+static inline dma_addr_t dev_phys_to_bus(struct udevice *dev,
+					 phys_addr_t phys)
+{
+	return phys - dev->dma_offset;
+}
+
+static inline phys_addr_t dev_bus_to_phys(struct udevice *dev,
+					  dma_addr_t bus)
+{
+	return bus + dev->dma_offset;
+}
+#endif
+
 #endif