diff options
Diffstat (limited to 'drivers/spi/spi_s3c24xx.c')
| -rw-r--r-- | drivers/spi/spi_s3c24xx.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c index 2ebe1fc..651379c 100644 --- a/drivers/spi/spi_s3c24xx.c +++ b/drivers/spi/spi_s3c24xx.c @@ -10,9 +10,6 @@ * */ - -//#define DEBUG - #include <linux/init.h> #include <linux/spinlock.h> #include <linux/workqueue.h> @@ -44,6 +41,9 @@ struct s3c24xx_spi { int len; int count; + int (*set_cs)(struct s3c2410_spi_info *spi, + int cs, int pol); + /* data buffers */ const unsigned char *tx; unsigned char *rx; @@ -64,6 +64,11 @@ static inline struct s3c24xx_spi *to_hw(struct spi_device *sdev) return spi_master_get_devdata(sdev->master); } +static void s3c24xx_spi_gpiocs(struct s3c2410_spi_info *spi, int cs, int pol) +{ + s3c2410_gpio_setpin(spi->pin_cs, pol); +} + static void s3c24xx_spi_chipsel(struct spi_device *spi, int value) { struct s3c24xx_spi *hw = to_hw(spi); @@ -72,10 +77,7 @@ static void s3c24xx_spi_chipsel(struct spi_device *spi, int value) switch (value) { case BITBANG_CS_INACTIVE: - if (hw->pdata->set_cs) - hw->pdata->set_cs(hw->pdata, value, cspol); - else - s3c2410_gpio_setpin(hw->pdata->pin_cs, cspol ^ 1); + hw->pdata->set_cs(hw->pdata, spi->chip_select, cspol^1); break; case BITBANG_CS_ACTIVE: @@ -96,14 +98,9 @@ static void s3c24xx_spi_chipsel(struct spi_device *spi, int value) /* write new configration */ writeb(spcon, hw->regs + S3C2410_SPCON); - - if (hw->pdata->set_cs) - hw->pdata->set_cs(hw->pdata, value, cspol); - else - s3c2410_gpio_setpin(hw->pdata->pin_cs, cspol); + hw->pdata->set_cs(hw->pdata, spi->chip_select, cspol); break; - } } @@ -174,7 +171,7 @@ static int s3c24xx_spi_setup(struct spi_device *spi) static inline unsigned int hw_txbyte(struct s3c24xx_spi *hw, int count) { - return hw->tx ? hw->tx[count] : 0xff; + return hw->tx ? hw->tx[count] : 0; } static int s3c24xx_spi_txrx(struct spi_device *spi, struct spi_transfer *t) @@ -330,9 +327,12 @@ static int s3c24xx_spi_probe(struct platform_device *pdev) /* setup any gpio we can */ if (!hw->pdata->set_cs) { + hw->set_cs = s3c24xx_spi_gpiocs; + s3c2410_gpio_setpin(hw->pdata->pin_cs, 1); s3c2410_gpio_cfgpin(hw->pdata->pin_cs, S3C2410_GPIO_OUTPUT); - } + } else + hw->set_cs = hw->pdata->set_cs; /* register our spi controller */ |