dm: Introduce xxx_get_dma_range()

Add the following functions to get a specific device's DMA ranges:
 - dev_get_dma_range()
 - ofnode_get_dma_range()
 - of_get_dma_range()
 - fdt_get_dma_range()
They are specially useful in oder to be able validate a physical address
space range into a bus's and to convert addresses from and to address
spaces.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/core/read.c b/drivers/core/read.c
index 14fd1214d6..4307ca4579 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -341,6 +341,12 @@ u64 dev_translate_dma_address(const struct udevice *dev, const fdt32_t *in_addr)
 	return ofnode_translate_dma_address(dev_ofnode(dev), in_addr);
 }
 
+int dev_get_dma_range(const struct udevice *dev, phys_addr_t *cpu,
+		      dma_addr_t *bus, u64 *size)
+{
+	return ofnode_get_dma_range(dev_ofnode(dev), cpu, bus, size);
+}
+
 int dev_read_alias_highest_id(const char *stem)
 {
 	if (of_live_active())