spi_s3c24xx: pin configuration updates

Add a pin configuration callback for the s3c24xx SPI driver, as there are
several options depending on the channel and the chip in use.

This is needed as the controller may not have been setup by the initial
bootloader and the fact that the SPI controller gets reset over
suspend/resume into slave mode but the GPIO function registers do not.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ben Dooks 2008-10-15 22:02:41 -07:00 коммит произвёл Linus Torvalds
Родитель f9b90e39cb
Коммит cf46b973f7
2 изменённых файлов: 7 добавлений и 0 удалений

Просмотреть файл

@ -18,6 +18,7 @@ struct s3c2410_spi_info {
unsigned int num_cs; /* total chipselects */
int bus_num; /* bus number to use. */
void (*gpio_setup)(struct s3c2410_spi_info *spi, int enable);
void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol);
};

Просмотреть файл

@ -247,6 +247,9 @@ static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw)
writeb(0xff, hw->regs + S3C2410_SPPRE);
writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);
writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);
if (hw->pdata && hw->pdata->gpio_setup)
hw->pdata->gpio_setup(hw->pdata, 1);
}
static int __init s3c24xx_spi_probe(struct platform_device *pdev)
@ -412,6 +415,9 @@ static int s3c24xx_spi_suspend(struct platform_device *pdev, pm_message_t msg)
{
struct s3c24xx_spi *hw = platform_get_drvdata(pdev);
if (hw->pdata && hw->pdata->gpio_setup)
hw->pdata->gpio_setup(hw->pdata, 0);
clk_disable(hw->clk);
return 0;
}