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add IXP4xx GPIOLIB support based on Chris' patch

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14241 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
kaloz 2009-01-28 15:15:46 +00:00
parent 1451733e66
commit bb41458ba5
1 changed files with 140 additions and 0 deletions
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140
target/linux/ixp4xx/patches-2.6.28/402-ixp4xx_gpiolib.patch Normal file
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@ -0,0 +1,140 @@
diff -ruN a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
--- a/arch/arm/mach-ixp4xx/common.c 2008-10-08 20:24:05.000000000 -0700
+++ b/arch/arm/mach-ixp4xx/common.c 2009-01-16 20:55:10.000000000 -0800
@@ -36,6 +36,7 @@
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
+#include <asm/gpio.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
@@ -374,12 +375,39 @@
unsigned long ixp4xx_exp_bus_size;
EXPORT_SYMBOL(ixp4xx_exp_bus_size);
+static int ixp4xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ gpio_line_config(gpio, IXP4XX_GPIO_IN);
+ return 0;
+}
+EXPORT_SYMBOL(ixp4xx_gpio_direction_input);
+
+static int ixp4xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
+{
+ gpio_line_set(gpio, level);
+ gpio_line_config(gpio, IXP4XX_GPIO_OUT);
+ return 0;
+}
+EXPORT_SYMBOL(ixp4xx_gpio_direction_output);
+
+static struct gpio_chip ixp4xx_gpio_chip = {
+ .label = "IXP4XX_GPIO_CHIP",
+ .direction_input = ixp4xx_gpio_direction_input,
+ .direction_output = ixp4xx_gpio_direction_output,
+ .get = gpio_get_value,
+ .set = gpio_set_value,
+ .base = 0,
+ .ngpio = 16,
+};
+
void __init ixp4xx_sys_init(void)
{
ixp4xx_exp_bus_size = SZ_16M;
platform_add_devices(ixp4xx_devices, ARRAY_SIZE(ixp4xx_devices));
+ gpiochip_add(&ixp4xx_gpio_chip);
+
if (cpu_is_ixp46x()) {
int region;
diff -ruN a/arch/arm/Kconfig b/arch/arm/Kconfig
--- a/arch/arm/Kconfig 2009-01-18 19:45:37.000000000 +0100
+++ b/arch/arm/Kconfig 2009-01-28 15:30:22.000000000 +0100
@@ -355,6 +355,7 @@
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select ARCH_WANT_OPTIONAL_GPIOLIB
select DMABOUNCE if PCI
help
Support for Intel's IXP4XX (XScale) family of processors.
diff -ruN a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
--- a/arch/arm/mach-ixp4xx/Kconfig 2008-12-31 10:29:21.000000000 -0800
+++ b/arch/arm/mach-ixp4xx/Kconfig 2009-01-16 15:17:54.000000000 -0800
@@ -28,6 +28,7 @@
config MACH_CAMBRIA
bool "Cambria"
select PCI
+ select GPIOLIB
help
Say 'Y' here if you want your kernel to support the Gateworks
Cambria series. For more information on this platform,
diff -ruN a/include/asm-arm/arch-ixp4xx/gpio.h b/include/asm-arm/arch-ixp4xx/gpio.h
--- a/arch/arm/mach-ixp4xx/include/mach/gpio.h 2008-10-08 20:24:05.000000000 -0700
+++ b/arch/arm/mach-ixp4xx/include/mach/gpio.h 2009-01-16 20:55:25.000000000 -0800
@@ -27,47 +27,31 @@
#include <linux/kernel.h>
#include <mach/hardware.h>
+#include <asm-generic/gpio.h> /* cansleep wrappers */
-static inline int gpio_request(unsigned gpio, const char *label)
-{
- return 0;
-}
-
-static inline void gpio_free(unsigned gpio)
-{
- might_sleep();
-
- return;
-}
-
-static inline int gpio_direction_input(unsigned gpio)
-{
- gpio_line_config(gpio, IXP4XX_GPIO_IN);
- return 0;
-}
-
-static inline int gpio_direction_output(unsigned gpio, int level)
-{
- gpio_line_set(gpio, level);
- gpio_line_config(gpio, IXP4XX_GPIO_OUT);
- return 0;
-}
+#define NR_BUILTIN_GPIO 16
static inline int gpio_get_value(unsigned gpio)
{
- int value;
-
- gpio_line_get(gpio, &value);
-
- return value;
+ if (gpio < NR_BUILTIN_GPIO)
+ {
+ int value;
+ gpio_line_get(gpio, &value);
+ return value;
+ }
+ else
+ return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
- gpio_line_set(gpio, value);
+ if (gpio < NR_BUILTIN_GPIO)
+ gpio_line_set(gpio, value);
+ else
+ __gpio_set_value(gpio, value);
}
-#include <asm-generic/gpio.h> /* cansleep wrappers */
+#define gpio_cansleep __gpio_cansleep
extern int gpio_to_irq(int gpio);
extern int irq_to_gpio(int gpio);