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ar71xx: ar71xx_spi: save and restore regs from probe/remove 

SVN-Revision: 29706
owl
Gabor Juhos 2012-01-11 09:14:13 +00:00
parent 714a9bd641
commit 09a6e3f662
1 changed files with 7 additions and 17 deletions
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24
target/linux/ar71xx/files/drivers/spi/ar71xx_spi.c
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@ -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 */ /* enable GPIO mode */
ar71xx_spi_wr(sp, SPI_REG_FS, SPI_FS_GPIO); 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); 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 */ /* restore CTRL register */
ar71xx_spi_wr(sp, SPI_REG_CTRL, sp->reg_ctrl); ar71xx_spi_wr(sp, SPI_REG_CTRL, sp->reg_ctrl);
/* disable GPIO mode */ /* 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) static int ar71xx_spi_setup(struct spi_device *spi)
{ {
int status;
if (spi->bits_per_word > 32) if (spi->bits_per_word > 32)
return -EINVAL; return -EINVAL;
if (!spi->controller_state) return spi_bitbang_setup(spi);
ar71xx_spi_setup_regs(spi);
status = spi_bitbang_setup(spi);
if (status && !spi->controller_state)
ar71xx_spi_restore_regs(spi);
return status;
} }
static void ar71xx_spi_cleanup(struct spi_device *spi) static void ar71xx_spi_cleanup(struct spi_device *spi)
{ {
ar71xx_spi_restore_regs(spi);
spi_bitbang_cleanup(spi); spi_bitbang_cleanup(spi);
} }
@ -229,10 +215,13 @@ static int ar71xx_spi_probe(struct platform_device *pdev)
goto err1; goto err1;
} }
ar71xx_spi_setup_regs(sp);
ret = spi_bitbang_start(&sp->bitbang); ret = spi_bitbang_start(&sp->bitbang);
if (!ret) if (!ret)
return 0; return 0;
ar71xx_spi_restore_regs(sp);
iounmap(sp->base); iounmap(sp->base);
err1: err1:
platform_set_drvdata(pdev, NULL); 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); struct ar71xx_spi *sp = platform_get_drvdata(pdev);
spi_bitbang_stop(&sp->bitbang); spi_bitbang_stop(&sp->bitbang);
ar71xx_spi_restore_regs(sp);
iounmap(sp->base); iounmap(sp->base);
platform_set_drvdata(pdev, NULL); platform_set_drvdata(pdev, NULL);
spi_master_put(sp->bitbang.master); spi_master_put(sp->bitbang.master);