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authorStefan Roese <sr@denx.de>2009-10-21 11:59:52 +0200
committerStefan Roese <sr@denx.de>2009-10-23 15:55:23 +0200
commit30d45c0d3ea2231f9131276ea113595959a0720e (patch)
tree8b96098e1b7d458715d1803b79a7c6d67efc2dbb /common
parent76706cb86b1c76954ff5353db6757ab99cfd95fb (diff)
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>
Diffstat (limited to 'common')
-rw-r--r--common/fdt_support.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 89164a12d7..40ff00a154 100644
--- 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