From bb41458ba515f1296d12a87affceab482f795077 Mon Sep 17 00:00:00 2001
From: kaloz <kaloz@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 28 Jan 2009 15:15:46 +0000
Subject: [PATCH] add IXP4xx GPIOLIB support based on Chris' patch
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14241 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../patches-2.6.28/402-ixp4xx_gpiolib.patch | 140 ++++++++++++++++++
1 file changed, 140 insertions(+)
create mode 100644 target/linux/ixp4xx/patches-2.6.28/402-ixp4xx_gpiolib.patch
diff --git a/target/linux/ixp4xx/patches-2.6.28/402-ixp4xx_gpiolib.patch b/target/linux/ixp4xx/patches-2.6.28/402-ixp4xx_gpiolib.patch
new file mode 100644
index 000000000..49726d6ea
--- /dev/null
+++ b/target/linux/ixp4xx/patches-2.6.28/402-ixp4xx_gpiolib.patch
@@ -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);
--
2.20.1