ar71xx: improve SPI flash read/write performance

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

1 files changed, 0 insertions, 98 deletions

diff --git a/target/linux/ar71xx/patches-3.3/205-spi-ath79-introduce-ath79_spi_-en-dis-able-helpers.patch b/target/linux/ar71xx/patches-3.3/205-spi-ath79-introduce-ath79_spi_-en-dis-able-helpers.patch
deleted file mode 100644
index ce98ad8e4c..0000000000
--- a/target/linux/ar71xx/patches-3.3/205-spi-ath79-introduce-ath79_spi_-en-dis-able-helpers.patch
+++ /dev/null
@@ -1,98 +0,0 @@
-From 4518ae06e5fc953abfd9c2b66c6155fc2b2696ce Mon Sep 17 00:00:00 2001
-From: Gabor Juhos <juhosg@openwrt.org>
-Date: Mon, 9 Jan 2012 15:00:46 +0100
-Subject: [PATCH 5/7] spi/ath79: introduce ath79_spi_{en,dis}able helpers
-
----
- drivers/spi/spi-ath79.c |   41 +++++++++++++++++++++++++----------------
- 1 files changed, 25 insertions(+), 16 deletions(-)
-
---- a/drivers/spi/spi-ath79.c
-+++ b/drivers/spi/spi-ath79.c
-@@ -89,16 +89,8 @@ static void ath79_spi_chipselect(struct
- 
- }
- 
--static int ath79_spi_setup_cs(struct spi_device *spi)
-+static void ath79_spi_enable(struct ath79_spi *sp)
- {
--	struct ath79_spi *sp = ath79_spidev_to_sp(spi);
--	struct ath79_spi_controller_data *cdata;
--	int status;
--
--	cdata = spi->controller_data;
--	if (spi->chip_select && !cdata)
--		return -EINVAL;
--
- 	/* enable GPIO mode */
- 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO);
- 
-@@ -108,6 +100,24 @@ static int ath79_spi_setup_cs(struct spi
- 
- 	/* TODO: setup speed? */
- 	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);
-+}
-+
-+static void ath79_spi_disable(struct ath79_spi *sp)
-+{
-+	/* restore CTRL register */
-+	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);
-+	/* disable GPIO mode */
-+	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);
-+}
-+
-+static int ath79_spi_setup_cs(struct spi_device *spi)
-+{
-+	struct ath79_spi_controller_data *cdata;
-+	int status;
-+
-+	cdata = spi->controller_data;
-+	if (spi->chip_select && !cdata)
-+		return -EINVAL;
- 
- 	status = 0;
- 	if (spi->chip_select) {
-@@ -128,17 +138,10 @@ static int ath79_spi_setup_cs(struct spi
- 
- static void ath79_spi_cleanup_cs(struct spi_device *spi)
- {
--	struct ath79_spi *sp = ath79_spidev_to_sp(spi);
--
- 	if (spi->chip_select) {
- 		struct ath79_spi_controller_data *cdata = spi->controller_data;
- 		gpio_free(cdata->gpio);
- 	}
--
--	/* restore CTRL register */
--	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);
--	/* disable GPIO mode */
--	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);
- }
- 
- static int ath79_spi_setup(struct spi_device *spi)
-@@ -242,13 +245,15 @@ static __devinit int ath79_spi_probe(str
- 		goto err_put_master;
- 	}
- 
-+	ath79_spi_enable(sp);
- 	ret = spi_bitbang_start(&sp->bitbang);
- 	if (ret)
--		goto err_unmap;
-+		goto err_disable;
- 
- 	return 0;
- 
--err_unmap:
-+err_disable:
-+	ath79_spi_disable(sp);
- 	iounmap(sp->base);
- err_put_master:
- 	platform_set_drvdata(pdev, NULL);
-@@ -262,6 +267,7 @@ static __devexit int ath79_spi_remove(st
- 	struct ath79_spi *sp = platform_get_drvdata(pdev);
- 
- 	spi_bitbang_stop(&sp->bitbang);
-+	ath79_spi_disable(sp);
- 	iounmap(sp->base);
- 	platform_set_drvdata(pdev, NULL);
- 	spi_master_put(sp->bitbang.master);