u-boot/0022-dm-Introduce-dev_phys_to_bus-dev_bu.patch

From c9ac0a0da12755016d1fbfe2a31bab0ddcdddfda Mon Sep 17 00:00:00 2001
From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Date: Tue, 12 Jan 2021 13:55:26 +0100
Subject: [PATCH] dm: Introduce dev_phys_to_bus()/dev_bus_to_phys()

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.

We can't yet get rid of the legacy phys_to_bus()/bus_to_phys()
implementations as some of its users are not integrated into the
device model.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
---
 include/phys2bus.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/phys2bus.h b/include/phys2bus.h
index dc9b8e5a25..866b8b51a8 100644
--- a/include/phys2bus.h
+++ b/include/phys2bus.h
@@ -21,4 +21,21 @@ 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_get_dma_offset(dev);
+}
+
+static inline phys_addr_t dev_bus_to_phys(struct udevice *dev, dma_addr_t bus)
+{
+	return bus + dev_get_dma_offset(dev);
+}
+#else
+#define dev_phys_to_bus(_, _addr)	_addr
+#define dev_bus_to_phys(_, _addr)	_addr
+#endif
+
 #endif