ar71xx: boost SPI flash read performance

[openwrt.git] / target / linux / ar71xx / patches-3.2 / 462-mtd-m25p80-set-spi-transfer-type.patch

diff --git a/target/linux/ar71xx/patches-3.2/462-mtd-m25p80-set-spi-transfer-type.patch b/target/linux/ar71xx/patches-3.2/462-mtd-m25p80-set-spi-transfer-type.patch
new file mode 100644 (file)
index 0000000..48e69c0
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.2/462-mtd-m25p80-set-spi-transfer-type.patch
@@ -0,0 +1,15 @@
+--- a/drivers/mtd/devices/m25p80.c
++++ b/drivers/mtd/devices/m25p80.c
+@@ -372,10 +372,12 @@ static int m25p80_read(struct mtd_info *
+        * OPCODE_FAST_READ (if available) is faster.
+        * Should add 1 byte DUMMY_BYTE.
+        */
++      t[0].type = SPI_TRANSFER_FLASH_READ_CMD;
+       t[0].tx_buf = flash->command;
+       t[0].len = m25p_cmdsz(flash) + FAST_READ_DUMMY_BYTE;
+       spi_message_add_tail(&t[0], &m);
+ 
++      t[1].type = SPI_TRANSFER_FLASH_READ_DATA;
+       spi_message_add_tail(&t[1], &m);
+ 
+       /* Byte count starts at zero. */