spi: Correct device tree usage in spi_flash_decode_fdt()

This function currently searches the entire device tree for a node that
it thinks is relevant. But the node is known and is passed in. Correct the
code and enable it only with driver model, since only driver-model boards
will use it.

This avoids bringing in a large number of strings from fdtdec.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index a567414669073f1a947d9d99cc35284c2f1286c6..8a60c72926d911ac6438873d989a452e9b222750 100644 (file)
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -939,14 +939,10 @@ static int set_quad_mode(struct spi_flash *flash, u8 idcode0)
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
 {
+#ifdef CONFIG_DM_SPI_FLASH
        fdt_addr_t addr;
        fdt_size_t size;
-       int node;
-
-       /* If there is no node, do nothing */
-       node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
-       if (node < 0)
-               return 0;
+       int node = flash->dev->of_offset;
 
        addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
        if (addr == FDT_ADDR_T_NONE) {
@@ -959,6 +955,7 @@ int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
                return -1;
        }
        flash->memory_map = map_sysmem(addr, size);
+#endif
 
        return 0;
 }