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authorFelix Fietkau <nbd@openwrt.org>2015-12-03 14:47:37 +0000
committerFelix Fietkau <nbd@openwrt.org>2015-12-03 14:47:37 +0000
commit2a68bea0738589f563531ace610ec00e6f24cd04 (patch)
treecc1ca6c921ea35c7a443ed8c0573f700d452885a /target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch
parente4d186b1097f5eef0e25aa339b22c6f83eb74d6f (diff)
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kernel: backport support for m25p80 compatible="jedec,spi-nor" in DT
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 47716
Diffstat (limited to 'target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch')
-rw-r--r--target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch39
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch b/target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch
new file mode 100644
index 0000000000..41b912d5d4
--- /dev/null
+++ b/target/linux/generic/patches-3.18/044-backport-m25p80-jedec-probe.patch
@@ -0,0 +1,39 @@
+--- 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
+@@ -927,8 +927,11 @@ 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;