[PATCH v3 1/9] core: read: add dev_read_addr_size_index_ptr function

[Jonas Karlman]

Add dev_read_addr_size_index_ptr function with the same functionality as
dev_read_addr_size_index, but instead a return pointer is given.
Use map_sysmem() function as cast for the return.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
---
v3:
- Collect r-b tag

v2:
- New patch

 drivers/core/read.c | 11 +++++++++++
 include/dm/read.h   | 21 +++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/core/read.c b/drivers/core/read.c
index 0289a2edb6a4..d289d00cf291 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -150,6 +150,17 @@ fdt_addr_t dev_read_addr_size_index(const struct udevice *dev, int index,
 		return devfdt_get_addr_size_index(dev, index, size);
 }
 
+void *dev_read_addr_size_index_ptr(const struct udevice *dev, int index,
+				   fdt_size_t *size)
+{
+	fdt_addr_t addr = dev_read_addr_size_index(dev, index, size);
+
+	if (addr == FDT_ADDR_T_NONE)
+		return NULL;
+
+	return map_sysmem(addr, 0);
+}
+
 void *dev_remap_addr_index(const struct udevice *dev, int index)
 {
 	fdt_addr_t addr = dev_read_addr_index(dev, index);
diff --git a/include/dm/read.h b/include/dm/read.h
index 56ac076c9f13..7dd43d61a665 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -246,6 +246,20 @@ void *dev_read_addr_index_ptr(const struct udevice *dev, int index);
 fdt_addr_t dev_read_addr_size_index(const struct udevice *dev, int index,
 				    fdt_size_t *size);
 
+/**
+ * dev_read_addr_size_index_ptr() - Get the indexed reg property of a device
+ *                                  as a pointer
+ *
+ * @dev: Device to read from
+ * @index: the 'reg' property can hold a list of <addr, size> pairs
+ *	   and @index is used to select which one is required
+ * @size: place to put size value (on success)
+ *
+ * Return: pointer or NULL if not found
+ */
+void *dev_read_addr_size_index_ptr(const struct udevice *dev, int index,
+				   fdt_size_t *size);
+
 /**
  * dev_remap_addr_index() - Get the indexed reg property of a device
  *                               as a memory-mapped I/O pointer
@@ -957,6 +971,13 @@ static inline fdt_addr_t dev_read_addr_size_index(const struct udevice *dev,
 	return devfdt_get_addr_size_index(dev, index, size);
 }
 
+static inline void *dev_read_addr_size_index_ptr(const struct udevice *dev,
+						 int index,
+						 fdt_size_t *size)
+{
+	return devfdt_get_addr_size_index_ptr(dev, index, size);
+}
+
 static inline fdt_addr_t dev_read_addr_name(const struct udevice *dev,
 					    const char *name)
 {
-- 
2.41.0