The patch titled
spi: use generic gpio calls in spi_s3c24xx_gpio
has been added to the -mm tree. Its filename is
spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: spi: use generic gpio calls in spi_s3c24xx_gpio
From: Ben Dooks <ben-linux@xxxxxxxxx>
Change the spi_s3c2410 driver to use the generic gpio calls that are now
available.
Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-s3c2410/include/mach/spi.h | 2 -
drivers/spi/spi_s3c24xx.c | 38 ++++++++++++++++-----
2 files changed, 30 insertions(+), 10 deletions(-)
diff -puN arch/arm/mach-s3c2410/include/mach/spi.h~spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio arch/arm/mach-s3c2410/include/mach/spi.h
--- a/arch/arm/mach-s3c2410/include/mach/spi.h~spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio
+++ a/arch/arm/mach-s3c2410/include/mach/spi.h
@@ -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. */
diff -puN drivers/spi/spi_s3c24xx.c~spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio drivers/spi/spi_s3c24xx.c
--- a/drivers/spi/spi_s3c24xx.c~spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio
+++ a/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 <asm/plat-s3c24xx/regs-spi.h>
#include <mach/spi.h>
@@ -66,7 +66,7 @@ static inline struct s3c24xx_spi *to_hw(
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(str
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(stru
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;
+ }
+
+ 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;
+ }
- s3c2410_gpio_setpin(pdata->pin_cs, 1);
- s3c2410_gpio_cfgpin(pdata->pin_cs, S3C2410_GPIO_OUTPUT);
+ 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(stru
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(str
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);
_
Patches currently in -mm which might be from ben-linux@xxxxxxxxx are
origin.patch
backlight-value-of-ili9320_rgb_if2-register-should-not-be-hardcoded.patch
spi-fix-spi_s3c24xx_gpio-device-handle-lookup.patch
spi-fix-spi_s3c24xx_gpio-num_chipselect.patch
spi-use-generic-gpio-calls-in-spi_s3c24xx_gpio.patch
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