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spi: use generic gpio calls in spi_s3c24xx_gpio

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Change the spi_s3c2410 driver to use the generic gpio calls that are now
available.

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 2009-01-06 14:41:44 -08:00 committed by Linus Torvalds
parent 5ee36c9898
commit ee9c1fbfe1
2 changed files with 30 additions and 10 deletions
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2
arch/arm/mach-s3c2410/include/mach/spi.h
View File

@ -14,7 +14,7 @@
#define __ASM_ARCH_SPI_H __FILE__
struct s3c2410_spi_info {
unsigned long pin_cs; /* simple gpio cs */
int pin_cs; /* simple gpio cs */
unsigned int num_cs; /* total chipselects */
int bus_num; /* bus number to use. */

38
drivers/spi/spi_s3c24xx.c
View File

@ -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);