diff mbox series

[v5,3/7] of: address: Retrieve a parent through a callback in __of_translate_address

Message ID 017ed75a4cc5e65305e7b6bc892a7e6479d1ccd3.1554108995.git-series.maxime.ripard@bootlin.com (mailing list archive)
State New, archived
Headers show
Series sunxi: Add DT representation for the MBUS controller | expand

Commit Message

Maxime Ripard April 1, 2019, 8:56 a.m. UTC 
The __of_translate_address function is used to translate the device tree
addresses to physical addresses using the various ranges property to create
the offset.

However, it's shared between the CPU addresses (based on the ranges
property) and the DMA addresses (based on dma-ranges). Since we're going to
add support for a DMA parent node that is not the DT parent node, we need
to change the logic a bit to have a callback function that will retrieve
the parent node we should use.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
 drivers/of/address.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 2270373b30ab..5359a80c4e8c 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -569,6 +569,7 @@  static int of_translate_one(struct device_node *parent, struct of_bus *bus,
  * relative to that node.
  */
 static u64 __of_translate_address(struct device_node *dev,
+				  struct device_node *(*get_parent)(const struct device_node *),
 				  const __be32 *in_addr, const char *rprop,
 				  struct device_node **host)
 {
@@ -585,7 +586,7 @@  static u64 __of_translate_address(struct device_node *dev,
 
 	*host = NULL;
 	/* Get parent & match bus type */
-	parent = of_get_parent(dev);
+	parent = get_parent(dev);
 	if (parent == NULL)
 		goto bail;
 	bus = of_match_bus(parent);
@@ -609,7 +610,7 @@  static u64 __of_translate_address(struct device_node *dev,
 		/* Switch to parent bus */
 		of_node_put(dev);
 		dev = parent;
-		parent = of_get_parent(dev);
+		parent = get_parent(dev);
 
 		/* If root, we have finished */
 		if (parent == NULL) {
@@ -665,7 +666,8 @@  u64 of_translate_address(struct device_node *dev, const __be32 *in_addr)
 	struct device_node *host;
 	u64 ret;
 
-	ret = __of_translate_address(dev, in_addr, "ranges", &host);
+	ret = __of_translate_address(dev, of_get_parent,
+				     in_addr, "ranges", &host);
 	if (host) {
 		of_node_put(host);
 		return OF_BAD_ADDR;
@@ -680,7 +682,8 @@  u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr)
 	struct device_node *host;
 	u64 ret;
 
-	ret = __of_translate_address(dev, in_addr, "dma-ranges", &host);
+	ret = __of_translate_address(dev, of_get_parent,
+				     in_addr, "dma-ranges", &host);
 
 	if (host) {
 		of_node_put(host);
@@ -736,7 +739,8 @@  static u64 of_translate_ioport(struct device_node *dev, const __be32 *in_addr,
 	unsigned long port;
 	struct device_node *host;
 
-	taddr = __of_translate_address(dev, in_addr, "ranges", &host);
+	taddr = __of_translate_address(dev, of_get_parent,
+				       in_addr, "ranges", &host);
 	if (host) {
 		/* host-specific port access */
 		port = logic_pio_trans_hwaddr(&host->fwnode, taddr, size);