diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/204-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.3/204-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/target/linux/ar71xx/patches-3.3/204-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch b/target/linux/ar71xx/patches-3.3/204-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch deleted file mode 100644 index 084bd98bbe..0000000000 --- a/target/linux/ar71xx/patches-3.3/204-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch +++ /dev/null @@ -1,108 +0,0 @@ -From e63ceaa0c4f7be0498cd452981073d3ce8e7d1f5 Mon Sep 17 00:00:00 2001 -From: Gabor Juhos <juhosg@openwrt.org> -Date: Mon, 9 Jan 2012 15:00:46 +0100 -Subject: [PATCH 32/34] spi/ath79: avoid multiple initialization of the SPI controller - -Currently we are initializing the SPI controller in -the chip select line function, and that function is -called once for each SPI device on the bus. If a -board has multiple SPI devices, the controller will -be initialized multiple times. - -Introduce ath79_spi_{en,dis}able helper functions, -and call those from probe/response in order to avoid -the mutliple initialization of the controller. - -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> ---- - drivers/spi/spi-ath79.c | 41 ++++++++++++++++++++++++----------------- - 1 files changed, 24 insertions(+), 17 deletions(-) - ---- a/drivers/spi/spi-ath79.c -+++ b/drivers/spi/spi-ath79.c -@@ -96,16 +96,8 @@ 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); - -@@ -115,6 +107,24 @@ 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) { -@@ -135,17 +145,10 @@ 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) -@@ -271,12 +274,15 @@ static __devinit int ath79_spi_probe(str - dev_dbg(&pdev->dev, "register read/write delay is %u nsecs\n", - sp->rrw_delay); - -+ ath79_spi_enable(sp); - ret = spi_bitbang_start(&sp->bitbang); - if (ret) -- goto err_clk_disable; -+ goto err_disable; - - return 0; - -+err_disable: -+ ath79_spi_disable(sp); - err_clk_disable: - clk_disable(sp->clk); - err_clk_put: -@@ -295,6 +301,7 @@ static __devexit int ath79_spi_remove(st - struct ath79_spi *sp = platform_get_drvdata(pdev); - - spi_bitbang_stop(&sp->bitbang); -+ ath79_spi_disable(sp); - clk_disable(sp->clk); - clk_put(sp->clk); - iounmap(sp->base); |