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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-01-11 09:14:13 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-01-11 09:14:13 +0000
commit8e61fd2405c6a571be2656a701107d21382d4166 (patch)
tree6a1c4a0166a292c66d19cd2ba39344008bdebff0 /target/linux/ar71xx/files
parent302dc3a936ec40757eef9f639b9247e1e15d25b4 (diff)
ar71xx: ar71xx_spi: save and restore regs from probe/remove
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29706 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/files')
-rw-r--r--target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c b/target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c
index f548cde6d..be356aafb 100644
--- a/target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c
+++ b/target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c
@@ -94,10 +94,8 @@ static void ar71xx_spi_chipselect(struct spi_device *spi, int value)
}
}
-static void ar71xx_spi_setup_regs(struct spi_device *spi)
+static void ar71xx_spi_setup_regs(struct ar71xx_spi *sp)
{
- struct ar71xx_spi *sp = spidev_to_sp(spi);
-
/* enable GPIO mode */
ar71xx_spi_wr(sp, SPI_REG_FS, SPI_FS_GPIO);
@@ -108,10 +106,8 @@ static void ar71xx_spi_setup_regs(struct spi_device *spi)
ar71xx_spi_wr(sp, SPI_REG_CTRL, 0x43);
}
-static void ar71xx_spi_restore_regs(struct spi_device *spi)
+static void ar71xx_spi_restore_regs(struct ar71xx_spi *sp)
{
- struct ar71xx_spi *sp = spidev_to_sp(spi);
-
/* restore CTRL register */
ar71xx_spi_wr(sp, SPI_REG_CTRL, sp->reg_ctrl);
/* disable GPIO mode */
@@ -120,24 +116,14 @@ static void ar71xx_spi_restore_regs(struct spi_device *spi)
static int ar71xx_spi_setup(struct spi_device *spi)
{
- int status;
-
if (spi->bits_per_word > 32)
return -EINVAL;
- if (!spi->controller_state)
- ar71xx_spi_setup_regs(spi);
-
- status = spi_bitbang_setup(spi);
- if (status && !spi->controller_state)
- ar71xx_spi_restore_regs(spi);
-
- return status;
+ return spi_bitbang_setup(spi);
}
static void ar71xx_spi_cleanup(struct spi_device *spi)
{
- ar71xx_spi_restore_regs(spi);
spi_bitbang_cleanup(spi);
}
@@ -229,10 +215,13 @@ static int ar71xx_spi_probe(struct platform_device *pdev)
goto err1;
}
+ ar71xx_spi_setup_regs(sp);
+
ret = spi_bitbang_start(&sp->bitbang);
if (!ret)
return 0;
+ ar71xx_spi_restore_regs(sp);
iounmap(sp->base);
err1:
platform_set_drvdata(pdev, NULL);
@@ -246,6 +235,7 @@ static int ar71xx_spi_remove(struct platform_device *pdev)
struct ar71xx_spi *sp = platform_get_drvdata(pdev);
spi_bitbang_stop(&sp->bitbang);
+ ar71xx_spi_restore_regs(sp);
iounmap(sp->base);
platform_set_drvdata(pdev, NULL);
spi_master_put(sp->bitbang.master);