aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch')
-rw-r--r--target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch108
1 files changed, 0 insertions, 108 deletions
diff --git a/target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch b/target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch
deleted file mode 100644
index 6230e5d97b..0000000000
--- a/target/linux/ar71xx/patches-3.2/205-spi-ath79-avoid-multiple-initialization-of-the-SPI-c.patch
+++ /dev/null
@@ -1,108 +0,0 @@
-From 25e681989198e94656eab9df22b8b761abd2ae26 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: 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);