fdt: Add fdt_fixup_nor_flash_size() to fixup NOR FLASH size in dtb

This function can be used to update the size in the "reg" property
of the NOR FLASH device nodes. This is necessary for boards with
non-fixed NOR FLASH sizes.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
Acked-by: Wolfgang Denk <wd@denx.de>

diff --git a/common/fdt_support.c b/common/fdt_support.c
index 89164a1..40ff00a 100644 (file)
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -692,3 +692,47 @@ int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
        return 0;
 }
 #endif
+
+#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
+/*
+ * This function can be used to update the size in the "reg" property
+ * of the NOR FLASH device nodes. This is necessary for boards with
+ * non-fixed NOR FLASH sizes.
+ */
+int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size)
+{
+       char compat[][16] = { "cfi-flash", "jedec-flash" };
+       int off;
+       int len;
+       struct fdt_property *prop;
+       u32 *reg;
+       int i;
+
+       for (i = 0; i < 2; i++) {
+               off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
+               while (off != -FDT_ERR_NOTFOUND) {
+                       /*
+                        * Found one compatible node, now check if this one
+                        * has the correct CS
+                        */
+                       prop = fdt_get_property_w(blob, off, "reg", &len);
+                       if (prop) {
+                               reg = (u32 *)&prop->data[0];
+                               if (reg[0] == cs) {
+                                       reg[2] = size;
+                                       fdt_setprop(blob, off, "reg", reg,
+                                                   3 * sizeof(u32));
+
+                                       return 0;
+                               }
+                       }
+
+                       /* Move to next compatible node */
+                       off = fdt_node_offset_by_compatible(blob, off,
+                                                           compat[i]);
+               }
+       }
+
+       return -1;
+}
+#endif

diff --git a/include/fdt_support.h b/include/fdt_support.h
index 16734c5..0a9dd0d 100644 (file)
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -79,5 +79,7 @@ void ft_pci_setup(void *blob, bd_t *bd);
 void set_working_fdt_addr(void *addr);
 int fdt_resize(void *blob);
 
+int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size);
+
 #endif /* ifdef CONFIG_OF_LIBFDT */
 #endif /* ifndef __FDT_SUPPORT_H */