From b77217d9638e50c95e322a1b188e2e9df7782853 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Tue, 27 Mar 2012 19:38:17 +0000 Subject: ar71xx: boost SPI flash read performance mtd_speedtest results: page read speed old new delta DB120 929 KiB/s 2597 KiB/s +179.55% TL-WR1043ND v1 754 KiB/s 2166 KiB/s +187.27% TL-WR703N v1 745 KiB/s 2176 KiB/s +192.08% TL-MR3220 v1 752 KiB/s 2154 KiB/s +186.44% TL-WR2543ND v1 564 KiB/s 2130 KiB/s +277.66% TL-WR741ND v2 525 KiB/s 1767 KiB/s +236.57% ALFA-AP96 702 KiB/s 1977 KiB/s +181.62% WNDR3700 697 KiB/s 1965 KiB/s +181.92% SVN-Revision: 31118 --- .../462-mtd-m25p80-set-spi-transfer-type.patch | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 target/linux/ar71xx/patches-3.3/462-mtd-m25p80-set-spi-transfer-type.patch (limited to 'target/linux/ar71xx/patches-3.3/462-mtd-m25p80-set-spi-transfer-type.patch') diff --git a/target/linux/ar71xx/patches-3.3/462-mtd-m25p80-set-spi-transfer-type.patch b/target/linux/ar71xx/patches-3.3/462-mtd-m25p80-set-spi-transfer-type.patch new file mode 100644 index 0000000..48e69c0 --- /dev/null +++ b/target/linux/ar71xx/patches-3.3/462-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. */ -- cgit v1.1