openwrt/target/linux/generic/pending-3.18/044-backport-m25p80-jedec-probe.patch

--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -310,11 +310,21 @@ static const struct spi_device_id m25p_i
 };
 MODULE_DEVICE_TABLE(spi, m25p_ids);
 
+static const struct of_device_id m25p_of_table[] = {
+	/*
+	 * Generic compatibility for SPI NOR that can be identified by the
+	 * JEDEC READ ID opcode (0x9F). Use this, if possible.
+	 */
+	{ .compatible = "jedec,spi-nor" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, m25p_of_table);
 
 static struct spi_driver m25p80_driver = {
 	.driver = {
 		.name	= "m25p80",
 		.owner	= THIS_MODULE,
+		.of_match_table = m25p_of_table,
 	},
 	.id_table	= m25p_ids,
 	.probe	= m25p_probe,
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -934,8 +934,11 @@ int spi_nor_scan(struct spi_nor *nor, co
 	if (ret)
 		return ret;
 
-	id = spi_nor_match_id(name);
+	if (name)
+		id = spi_nor_match_id(name);
 	if (!id)
+		id = nor->read_id(nor);
+	if (IS_ERR_OR_NULL(id))
 		return -ENOENT;
 
 	info = (void *)id->driver_data;