mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-27 23:02:04 +02:00
99 lines
2.5 KiB
Diff
99 lines
2.5 KiB
Diff
|
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);
|