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authorRafał Miłecki <zajec5@gmail.com>2014-12-01 09:42:16 +0100
committerBrian Norris <computersforpeace@gmail.com>2014-12-01 10:21:42 -0800
commit58c81957b7d284c57a9fc1b815c77155ef744ea5 (patch)
treeb33c19eab6c57813ebc6df7ab22255ceb235b818 /drivers/mtd
parent7ca94e07fe8ccbaca9ecb59f388ab8dd93c73e88 (diff)
mtd: spi-nor: allow NULL as chip name and try to auto detect it
This will allow spi-nor users to plainly use JEDEC to detect flash chip. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 0f4f2ba16e3e..0f8ec3c2d015 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -938,13 +938,21 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
if (ret)
return ret;
- id = spi_nor_match_id(name);
- if (!id)
+ /* Try to auto-detect if chip name wasn't specified */
+ if (!name)
+ id = spi_nor_read_id(nor);
+ else
+ id = spi_nor_match_id(name);
+ if (IS_ERR_OR_NULL(id))
return -ENOENT;
info = (void *)id->driver_data;
- if (info->id_len) {
+ /*
+ * If caller has specified name of flash model that can normally be
+ * detected using JEDEC, let's verify it.
+ */
+ if (name && info->id_len) {
const struct spi_device_id *jid;
jid = spi_nor_read_id(nor);