diff options
Diffstat (limited to 'drivers/spi/spi_s3c24xx.c')
| -rw-r--r-- | drivers/spi/spi_s3c24xx.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c index 256d18395a2..b3ebc1d0f85 100644 --- a/drivers/spi/spi_s3c24xx.c +++ b/drivers/spi/spi_s3c24xx.c @@ -19,6 +19,7 @@ #include <linux/err.h> #include <linux/clk.h> #include <linux/platform_device.h> +#include <linux/gpio.h> #include <linux/spi/spi.h> #include <linux/spi/spi_bitbang.h> @@ -27,7 +28,6 @@ #include <asm/dma.h> #include <mach/hardware.h> -#include <mach/regs-gpio.h> #include <plat/regs-spi.h> #include <mach/spi.h> @@ -66,7 +66,7 @@ static inline struct s3c24xx_spi *to_hw(struct spi_device *sdev) static void s3c24xx_spi_gpiocs(struct s3c2410_spi_info *spi, int cs, int pol) { - s3c2410_gpio_setpin(spi->pin_cs, pol); + gpio_set_value(spi->pin_cs, pol); } static void s3c24xx_spi_chipsel(struct spi_device *spi, int value) @@ -248,8 +248,13 @@ static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw) 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); + if (hw->pdata) { + if (hw->set_cs == s3c24xx_spi_gpiocs) + gpio_direction_output(hw->pdata->pin_cs, 1); + + if (hw->pdata->gpio_setup) + hw->pdata->gpio_setup(hw->pdata, 1); + } } static int __init s3c24xx_spi_probe(struct platform_device *pdev) @@ -343,18 +348,27 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev) goto err_no_clk; } - s3c24xx_spi_initialsetup(hw); - /* setup any gpio we can */ if (!pdata->set_cs) { - hw->set_cs = s3c24xx_spi_gpiocs; + if (pdata->pin_cs < 0) { + dev_err(&pdev->dev, "No chipselect pin\n"); + goto err_register; + } - s3c2410_gpio_setpin(pdata->pin_cs, 1); - s3c2410_gpio_cfgpin(pdata->pin_cs, S3C2410_GPIO_OUTPUT); + err = gpio_request(pdata->pin_cs, dev_name(&pdev->dev)); + if (err) { + dev_err(&pdev->dev, "Failed to get gpio for cs\n"); + goto err_register; + } + + hw->set_cs = s3c24xx_spi_gpiocs; + gpio_direction_output(pdata->pin_cs, 1); } else hw->set_cs = pdata->set_cs; + s3c24xx_spi_initialsetup(hw); + /* register our spi controller */ err = spi_bitbang_start(&hw->bitbang); @@ -366,6 +380,9 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev) return 0; err_register: + if (hw->set_cs == s3c24xx_spi_gpiocs) + gpio_free(pdata->pin_cs); + clk_disable(hw->clk); clk_put(hw->clk); @@ -401,6 +418,9 @@ static int __exit s3c24xx_spi_remove(struct platform_device *dev) free_irq(hw->irq, hw); iounmap(hw->regs); + if (hw->set_cs == s3c24xx_spi_gpiocs) + gpio_free(hw->pdata->pin_cs); + release_resource(hw->ioarea); kfree(hw->ioarea); |