core: read: add dev_read_addr_size_index_ptr function

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@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/drivers/core/read.c b/drivers/core/read.c
index 5749473a6cae0ed13a6a434cea203aaadf77b9c9..49066b59cdaf461dda00d8b412dfcc526d319a13 100644 (file)
--- 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 137f2a52a298d3b696d6528af5f31651bd5ca572..c2615f72f4059b975994ba081f0138b8c7a87a0e 100644 (file)
--- 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
@@ -952,6 +966,13 @@ 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)
 {