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ar71xx: improve SPI flash read/write performance

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mtd_speedtest results:

                        page write speed
                    old         new       delta
DB120            209 KiB/s   226 KiB/s     +8.13%
TL-WR1043ND v1   122 KiB/s   148 KiB/s    +21.31%
TL-WR703N v1     153 KiB/s   194 KiB/s    +26.80%
TL-MR3220 v1     130 KiB/s   156 KiB/s    +20.00%
TL-WR2543ND v1   158 KiB/s   202 KiB/s    +27.85%
TL-WR741ND v2    122 KiB/s   152 KiB/s    +24.59%
ALFA AP96        229 KiB/s   260 KiB/s    +13.54%
WNDR3700         202 KiB/s   223 KiB/s    +10.40%

                         page read speed
                    old        new       delta
DB120            691 KiB/s   929 KiB/s    +34.44%
TL-WR1043ND v1   372 KiB/s   754 KiB/s   +102.69%
TL-WR703N v1     375 KiB/s   745 KiB/s    +98.67%
TL-MR3220 v1     372 KiB/s   752 KiB/s   +102.15%
TL-WR2543ND v1   307 KiB/s   564 KiB/s    +83.71%
TL-WR741ND v2    315 KiB/s   525 KiB/s    +66.67%
ALFA AP96        515 KiB/s   702 KiB/s    +36.31%
WNDR3700         515 KiB/s   697 KiB/s    +35.34%

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31117 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
2012-03-27 19:38:15 +00:00
parent ad01160aa2
commit ac19ad9ae4
18 changed files with 514 additions and 324 deletions
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6
target/linux/ar71xx/patches-3.3/204-spi-ath79-use-gpio_request_one.patch
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@@ -1,4 +1,4 @@
From c5bfb0c760a5d8de7ffc3a6acfb8c782be6af1a5 Mon Sep 17 00:00:00 2001
From dd5b424b0b3f0370f9b63594ad53c16989b6ad78 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Mon, 9 Jan 2012 15:04:21 +0100
Subject: [PATCH 4/7] spi/ath79: use gpio_request_one
@@ -12,7 +12,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -93,6 +93,7 @@ static int ath79_spi_setup_cs(struct spi
@@ -100,6 +100,7 @@ static int ath79_spi_setup_cs(struct spi
{
struct ath79_spi *sp = ath79_spidev_to_sp(spi);
struct ath79_spi_controller_data *cdata;
@@ -20,7 +20,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
cdata = spi->controller_data;
if (spi->chip_select && !cdata)
@@ -108,22 +109,21 @@ static int ath79_spi_setup_cs(struct spi
@@ -115,22 +116,21 @@ static int ath79_spi_setup_cs(struct spi
/* TODO: setup speed? */
ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);