dm: core: Add a new api to get indexed device address

Add new api to get device address based on index.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Jagan Teki <jteki@openedev.com>
[Rebased on master]
Signed-off-by: Jagan Teki <jteki@openedev.com>

diff --git a/drivers/core/device.c b/drivers/core/device.c
index 7a02a93..8c6e6b0 100644 (file)
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -581,17 +581,35 @@ const char *dev_get_uclass_name(struct udevice *dev)
        return dev->uclass->uc_drv->name;
 }
 
-fdt_addr_t dev_get_addr(struct udevice *dev)
+fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
 {
 #if CONFIG_IS_ENABLED(OF_CONTROL)
        fdt_addr_t addr;
 
        if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
                const fdt32_t *reg;
+               int len = 0;
+               int na, ns;
 
-               reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", NULL);
-               if (!reg)
+               na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset);
+               if (na < 1) {
+                       debug("bad #address-cells\n");
                        return FDT_ADDR_T_NONE;
+               }
+
+               ns = fdt_size_cells(gd->fdt_blob, dev->parent->of_offset);
+               if (ns < 0) {
+                       debug("bad #size-cells\n");
+                       return FDT_ADDR_T_NONE;
+               }
+
+               reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", &len);
+               if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
+                       debug("Req index out of range\n");
+                       return FDT_ADDR_T_NONE;
+               }
+
+               reg += index * (na + ns);
 
                /*
                 * Use the full-fledged translate function for complex
@@ -607,7 +625,7 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
                addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
                                                        dev->parent->of_offset,
                                                        dev->of_offset, "reg",
-                                                       0, NULL);
+                                                       index, NULL);
                if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
                        if (device_get_uclass_id(dev->parent) ==
                            UCLASS_SIMPLE_BUS)
@@ -629,6 +647,11 @@ fdt_addr_t dev_get_addr(struct udevice *dev)
 #endif
 }
 
+fdt_addr_t dev_get_addr(struct udevice *dev)
+{
+       return dev_get_addr_index(dev, 0);
+}
+
 bool device_has_children(struct udevice *dev)
 {
        return !list_empty(&dev->child_head);

diff --git a/include/dm/device.h b/include/dm/device.h
index d9fc7fb..1cf8150 100644 (file)
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -454,6 +454,17 @@ int device_find_next_child(struct udevice **devp);
 fdt_addr_t dev_get_addr(struct udevice *dev);
 
 /**
+ * dev_get_addr_index() - Get the indexed reg property of a device
+ *
+ * @dev: Pointer to a device
+ * @index: the 'reg' property can hold a list of <addr, size> pairs
+ *        and @index is used to select which one is required
+ *
+ * @return addr
+ */
+fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
+
+/**
  * device_has_children() - check if a device has any children
  *
  * @dev:       Device to check