add generic GPIO to MIPS boards, use it for au1000 and for the MTX-1 led driver as well

SVN-Revision: 7334
2007-05-24 23:30:35 +00:00 · 2007-05-24 23:30:35 +00:00 · 3368856944
commit 3368856944
parent 46f7d89f9c
4 changed files with 366 additions and 63 deletions
--- a/target/linux/au1000-2.6/config/default
+++ b/target/linux/au1000-2.6/config/default
@ -2,10 +2,13 @@ CONFIG_32BIT=y
 # CONFIG_64BIT is not set
 CONFIG_64BIT_PHYS_ADDR=y
 # CONFIG_8139TOO is not set
+# CONFIG_ARCH_HAS_ILOG2_U32 is not set
+# CONFIG_ARCH_HAS_ILOG2_U64 is not set
 # CONFIG_ATM is not set
 # CONFIG_B44 is not set
 CONFIG_BASE_SMALL=0
-# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
+CONFIG_BITREVERSE=y
+# CONFIG_BROADCOM_PHY is not set
 CONFIG_CHR_DEV_SG=m
 CONFIG_CMDLINE="root=/dev/mtdblock0 rootfstype=jffs2 init=/etc/preinit"
 # CONFIG_CPU_BIG_ENDIAN is not set
@ -45,12 +48,15 @@ CONFIG_DMA_NONCOHERENT=y
 CONFIG_DUMMY=m
 CONFIG_ELF_CORE=y
 # CONFIG_ENABLE_MUST_CHECK is not set
-# CONFIG_FIRMWARE_EDID is not set
 # CONFIG_FIXED_PHY is not set
 CONFIG_FS_POSIX_ACL=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
+CONFIG_GENERIC_GPIO=y
+# CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set
 # CONFIG_GEN_RTC is not set
 # CONFIG_HAMRADIO is not set
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
 CONFIG_HW_HAS_PCI=y
 CONFIG_HW_RANDOM=y
 CONFIG_HZ=250
@ -64,44 +70,17 @@ CONFIG_I2C=m
 CONFIG_I2C_ALGOBIT=m
 CONFIG_I2C_ALGOPCA=m
 CONFIG_I2C_ALGOPCF=m
-# CONFIG_I2C_ALI1535 is not set
-# CONFIG_I2C_ALI1563 is not set
-# CONFIG_I2C_ALI15X3 is not set
-# CONFIG_I2C_AMD756 is not set
-# CONFIG_I2C_AMD8111 is not set
 CONFIG_I2C_AU1X00GPIO=m
 CONFIG_I2C_CHARDEV=m
-# CONFIG_I2C_DEBUG_ALGO is not set
-# CONFIG_I2C_DEBUG_BUS is not set
-# CONFIG_I2C_DEBUG_CHIP is not set
-# CONFIG_I2C_DEBUG_CORE is not set
-# CONFIG_I2C_I801 is not set
-# CONFIG_I2C_I810 is not set
-# CONFIG_I2C_NFORCE2 is not set
-# CONFIG_I2C_OCORES is not set
-# CONFIG_I2C_PARPORT_LIGHT is not set
-# CONFIG_I2C_PCA_ISA is not set
-# CONFIG_I2C_PIIX4 is not set
-# CONFIG_I2C_PROSAVAGE is not set
-# CONFIG_I2C_SAVAGE4 is not set
-# CONFIG_I2C_SIS5595 is not set
-# CONFIG_I2C_SIS630 is not set
-# CONFIG_I2C_SIS96X is not set
-# CONFIG_I2C_STUB is not set
-# CONFIG_I2C_VIA is not set
-# CONFIG_I2C_VIAPRO is not set
-# CONFIG_I2C_VOODOO3 is not set
 # CONFIG_IDE is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_JFFS2_FS_DEBUG=0
-# CONFIG_LAN_SAA9730 is not set
 CONFIG_LEDS_MTX1=y
 # CONFIG_LEDS_TRIGGERS is not set
 # CONFIG_MACH_DECSTATION is not set
 # CONFIG_MACH_JAZZ is not set
 # CONFIG_MACH_VR41XX is not set
 CONFIG_MAGIC_SYSRQ=y
-CONFIG_MINI_FO=y
 CONFIG_MIPS=y
 # CONFIG_MIPS_ATLAS is not set
 CONFIG_MIPS_AU1X00_ENET=y
@ -138,6 +117,7 @@ CONFIG_MODULE_FORCE_UNLOAD=y
 CONFIG_MTD=y
 # CONFIG_MTD_ABSENT is not set
 # CONFIG_MTD_ALCHEMY is not set
+CONFIG_MTD_BLKDEVS=y
 CONFIG_MTD_BLOCK=y
 # CONFIG_MTD_BLOCK2MTD is not set
 CONFIG_MTD_CFI=y
@ -182,33 +162,38 @@ CONFIG_MTD_PARTITIONS=y
 CONFIG_MTX1_WATCHDOG=y
 # CONFIG_NATSEMI is not set
 # CONFIG_NE2K_PCI is not set
+CONFIG_NET_SCH_FIFO=y
 # CONFIG_NET_VENDOR_3COM is not set
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_MARK=y
+CONFIG_NF_CT_ACCT=y
+# CONFIG_NF_NAT_AMANDA is not set
+CONFIG_NF_NAT_FTP=m
+CONFIG_NF_NAT_H323=m
+CONFIG_NF_NAT_IRC=m
+CONFIG_NF_NAT_NEEDED=y
+# CONFIG_NF_NAT_PPTP is not set
+CONFIG_NF_NAT_SIP=m
+# CONFIG_NF_NAT_TFTP is not set
 # CONFIG_PAGE_SIZE_16KB is not set
 CONFIG_PAGE_SIZE_4KB=y
 # CONFIG_PAGE_SIZE_64KB is not set
 # CONFIG_PAGE_SIZE_8KB is not set
-# CONFIG_PCCARD is not set
 # CONFIG_PCIPCWATCHDOG is not set
 CONFIG_PHYLIB=y
-# CONFIG_PM is not set
 # CONFIG_PMC_YOSEMITE is not set
+# CONFIG_PNPACPI is not set
 # CONFIG_PNX8550_JBS is not set
-# CONFIG_PNX8550_V2PCI is not set
+# CONFIG_PNX8550_STB810 is not set
 # CONFIG_PPP_MPPE is not set
 # CONFIG_PREVENT_FIRMWARE_BUILD is not set
 # CONFIG_QSEMI_PHY is not set
+CONFIG_RESOURCES_64BIT=y
 # CONFIG_RTC is not set
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
 CONFIG_SCSI_CONSTANTS=y
 # CONFIG_SCSI_PROC_FS is not set
-# CONFIG_SENSORS_DS1337 is not set
-# CONFIG_SENSORS_DS1374 is not set
-# CONFIG_SENSORS_EEPROM is not set
-# CONFIG_SENSORS_MAX6875 is not set
-# CONFIG_SENSORS_PCA9539 is not set
-# CONFIG_SENSORS_PCF8574 is not set
-# CONFIG_SENSORS_PCF8591 is not set
 CONFIG_SERIAL_8250_AU1X00=y
 # CONFIG_SERIAL_8250_EXTENDED is not set
 CONFIG_SERIAL_8250_NR_UARTS=4
@ -235,10 +220,12 @@ CONFIG_SOFT_WATCHDOG=m
 # CONFIG_SPARSEMEM_STATIC is not set
 # CONFIG_STANDALONE is not set
 CONFIG_STRIP=m
-CONFIG_SYN_COOKIES=y
+CONFIG_SYSVIPC_SYSCTL=y
 CONFIG_SYS_HAS_CPU_MIPS32_R1=y
 CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
+CONFIG_SYS_SUPPORTS_APM_EMULATION=y
 CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_KGDB=y
 CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
 # CONFIG_TMD_HERMES is not set
 # CONFIG_TOSHIBA_JMR3927 is not set
@ -247,10 +234,15 @@ CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
 CONFIG_TRAD_SIGNALS=y
 # CONFIG_UNUSED_SYMBOLS is not set
 # CONFIG_USBPCWATCHDOG is not set
+# CONFIG_USB_EHCI_BIG_ENDIAN_MMIO is not set
 CONFIG_USB_EHCI_HCD=m
 # CONFIG_USB_EHCI_ROOT_HUB_TT is not set
 # CONFIG_USB_EHCI_SPLIT_ISO is not set
 # CONFIG_USB_EHCI_TT_NEWSCHED is not set
+# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
+# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
 CONFIG_USB_OHCI_HCD=m
 CONFIG_USB_UHCI_HCD=m
 # CONFIG_VIA_RHINE is not set
+CONFIG_ZONE_DMA=y
+CONFIG_ZONE_DMA_FLAG=1
--- a/target/linux/au1000-2.6/files/drivers/leds/leds-mtx1.c
+++ b/target/linux/au1000-2.6/files/drivers/leds/leds-mtx1.c
@ -14,41 +14,26 @@
 #include <linux/platform_device.h>
 #include <linux/leds.h>
 #include <linux/err.h>
-#include <asm/mach-au1x00/au1000.h>
+#include <asm/gpio.h>

 static struct platform_device *pdev;

-static void mtx1_green_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
+static void mtx1_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
 {
-	/* The power LED cannot be controlled the same way as for the Status LED */
-	if (brightness) {
-        	au_writel( 0x18000800, GPIO2_OUTPUT );
-	} else {
-		au_writel( 0x18000000, GPIO2_OUTPUT);
-	}
-}
-
-static void mtx1_red_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
-{
-	/* We store GPIO address (originally address - 200) in the "flags" field*/
-	unsigned long pinmask = 1 << led_cdev->flags; 
-	if (brightness) {
-		au_writel((pinmask << 16) | pinmask, GPIO2_OUTPUT); 
-	} else { 
-		au_writel((pinmask << 16) | 0, GPIO2_OUTPUT);
-	}
+	if (!strcmp("mtx1:green", led_cdev->name))
+		gpio_set_value(211, brightness ? 1 : 0);
+	else
+		gpio_set_value(212, brightness ? 1 : 0);
 }

 static struct led_classdev mtx1_green_led = {
 	.name = "mtx1:green",
-	.brightness_set = mtx1_green_led_set,
+	.brightness_set = mtx1_led_set,
 };

 static struct led_classdev mtx1_red_led = {
 	.name = "mtx1:red",
-	.flags = 12,
-	.brightness_set = mtx1_red_led_set,
-	.default_trigger = "ide-disk",
+	.brightness_set = mtx1_led_set,
 };

 static int mtx1_leds_probe(struct platform_device *pdev)
--- a/target/linux/au1000-2.6/patches/001-au1x00_gpio.patch
+++ b/target/linux/au1000-2.6/patches/001-au1x00_gpio.patch
@ -0,0 +1,294 @@
+diff -urN linux-2.6.21.1/arch/mips/au1000/common/gpio.c linux-2.6.21.1.new/arch/mips/au1000/common/gpio.c
+--- linux-2.6.21.1/arch/mips/au1000/common/gpio.c	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.new/arch/mips/au1000/common/gpio.c	2007-05-22 21:41:55.000000000 +0200
+@@ -1,4 +1,7 @@
+ /*
+ *  Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
+ *  	Architecture specific GPIO support
+ *
+  *  This program is free software; you can redistribute	 it and/or modify it
+  *  under  the terms of	 the GNU General  Public License as published by the
+  *  Free Software Foundation;  either version 2 of the	License, or (at your
+@@ -18,101 +21,133 @@
+  *  You should have received a copy of the  GNU General Public License along
+  *  with this program; if not, write  to the Free Software Foundation, Inc.,
+  *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Notes :
+ * 	au1000 SoC have only one GPIO line : GPIO1
+ * 	others have a second one : GPIO2
+  */
+
+#include <linux/autoconf.h>
+#include <linux/init.h>
+#include <linux/types.h>
+ #include <linux/module.h>
+-#include <au1000.h>
+-#include <au1xxx_gpio.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/gpio.h>
+ 
+ #define gpio1 sys
+ #if !defined(CONFIG_SOC_AU1000)
+ static AU1X00_GPIO2 * const gpio2 = (AU1X00_GPIO2 *)GPIO2_BASE;
+#define GPIO2_OUTPUT_ENABLE_MASK 	0x00010000
+ 
+-#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
+-
+-int au1xxx_gpio2_read(int signal)
+static int au1xxx_gpio2_read(unsigned gpio)
+ {
+-	signal -= 200;
+-/*	gpio2->dir &= ~(0x01 << signal);						//Set GPIO to input */
+-	return ((gpio2->pinstate >> signal) & 0x01);
+	gpio -= AU1XXX_GPIO_BASE;
+	return ((gpio2->pinstate >> gpio) & 0x01);
+ }
+ 
+-void au1xxx_gpio2_write(int signal, int value)
+static void au1xxx_gpio2_write(unsigned gpio, int value)
+ {
+-	signal -= 200;
+	gpio -= AU1XXX_GPIO_BASE;
+ 
+-	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << signal) |
+-		(value << signal);
+	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) |
+	                (value << gpio);
+ }
+ 
+-void au1xxx_gpio2_tristate(int signal)
+static int au1xxx_gpio2_direction_input(unsigned gpio)
+ {
+-	signal -= 200;
+-	gpio2->dir &= ~(0x01 << signal); 	/* Set GPIO to input */
+	gpio -= AU1XXX_GPIO_BASE;
+	gpio2->dir &= ~(0x01 << gpio);
+	return 0;
+ }
+-#endif
+ 
+-int au1xxx_gpio1_read(int signal)
+static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
+{
+	gpio -= AU1XXX_GPIO_BASE;
+	gpio2->dir = (0x01 << gpio) | (value << gpio);
+	return 0;
+}
+
+#endif /* !defined(CONFIG_SOC_AU1000) */
+
+static int au1xxx_gpio1_read(unsigned gpio)
+ {
+-/*	gpio1->trioutclr |= (0x01 << signal); */
+-	return ((gpio1->pinstaterd >> signal) & 0x01);
+	return ((gpio1->pinstaterd >> gpio) & 0x01);
+ }
+ 
+-void au1xxx_gpio1_write(int signal, int value)
+static void au1xxx_gpio1_write(unsigned gpio, int value)
+ {
+ 	if(value)
+-		gpio1->outputset = (0x01 << signal);
+		gpio1->outputset = (0x01 << gpio);
+ 	else
+-		gpio1->outputclr = (0x01 << signal);	/* Output a Zero */
+		/* Output a zero */
+		gpio1->outputclr = (0x01 << gpio);
+ }
+ 
+-void au1xxx_gpio1_tristate(int signal)
+static int au1xxx_gpio1_direction_input(unsigned gpio)
+ {
+-	gpio1->trioutclr = (0x01 << signal);		/* Tristate signal */
+	gpio1->pininputen = (0x01 << gpio);
+	return 0;
+ }
+ 
+static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
+{
+	gpio1->trioutclr = (0x01 & gpio);
+	return 0;
+}
+ 
+-int au1xxx_gpio_read(int signal)
+int au1xxx_gpio_get_value(unsigned gpio)
+ {
+-	if(signal >= 200)
+	if(gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		return 0;
+ #else
+-		return au1xxx_gpio2_read(signal);
+		return au1xxx_gpio2_read(gpio);
+ #endif
+ 	else
+-		return au1xxx_gpio1_read(signal);
+		return au1xxx_gpio1_read(gpio);
+ }
+ 
+-void au1xxx_gpio_write(int signal, int value)
+void au1xxx_gpio_set_value(unsigned gpio, int value)
+ {
+-	if(signal >= 200)
+	if(gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		;
+ #else
+-		au1xxx_gpio2_write(signal, value);
+		au1xxx_gpio2_write(gpio, value);
+ #endif
+ 	else
+-		au1xxx_gpio1_write(signal, value);
+		au1xxx_gpio1_write(gpio, value);
+ }
+ 
+-void au1xxx_gpio_tristate(int signal)
+int au1xxx_gpio_direction_input(unsigned gpio)
+ {
+-	if(signal >= 200)
+	if (gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		;
+ #else
+-		au1xxx_gpio2_tristate(signal);
+		return au1xxx_gpio2_direction_input(gpio);
+ #endif
+ 	else
+-		au1xxx_gpio1_tristate(signal);
+		return au1xxx_gpio1_direction_input(gpio);
+ }
+ 
+-void au1xxx_gpio1_set_inputs(void)
+int au1xxx_gpio_direction_output(unsigned gpio, int value)
+ {
+-	gpio1->pininputen = 0;
+	if (gpio >= AU1XXX_GPIO_BASE)
+#if defined(CONFIG_SOC_AU1000)
+		;
+#else
+		return au1xxx_gpio2_direction_output(gpio, value);
+#endif
+	else
+		return au1xxx_gpio1_direction_output(gpio, value);
+ }
+ 
+-EXPORT_SYMBOL(au1xxx_gpio1_set_inputs);
+-EXPORT_SYMBOL(au1xxx_gpio_tristate);
+-EXPORT_SYMBOL(au1xxx_gpio_write);
+-EXPORT_SYMBOL(au1xxx_gpio_read);
+EXPORT_SYMBOL(au1xxx_gpio_direction_output);
+EXPORT_SYMBOL(au1xxx_gpio_direction_input);
+EXPORT_SYMBOL(au1xxx_gpio_get_value);
+EXPORT_SYMBOL(au1xxx_gpio_set_value);
+--- linux-2.6.21.1/arch/mips/Kconfig	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.new/arch/mips/Kconfig	2007-05-21 08:04:42.000000000 +0200
+@@ -1044,6 +1044,7 @@
+ 	select SYS_SUPPORTS_32BIT_KERNEL
+ 	select SYS_SUPPORTS_APM_EMULATION
+ 	select SYS_SUPPORTS_KGDB
+	select GENERIC_GPIO
+ 
+ config PNX8550
+ 	bool
+diff -urN linux-2.6.21.1/include/asm-mips/mach-au1x00/au1xxx_gpio.h linux-2.6.21.1.new/include/asm-mips/mach-au1x00/au1xxx_gpio.h
+--- linux-2.6.21.1/include/asm-mips/mach-au1x00/au1xxx_gpio.h	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.new/include/asm-mips/mach-au1x00/au1xxx_gpio.h	1970-01-01 01:00:00.000000000 +0100
+@@ -1,20 +0,0 @@
+-#ifndef __AU1XXX_GPIO_H
+-#define __AU1XXX_GPIO_H
+-
+-void au1xxx_gpio1_set_inputs(void);
+-void au1xxx_gpio_tristate(int signal);
+-void au1xxx_gpio_write(int signal, int value);
+-int  au1xxx_gpio_read(int signal);
+-
+-typedef volatile struct
+-{
+-	u32 dir;
+-	u32 reserved;
+-	u32 output;
+-	u32 pinstate;
+-	u32 inten;
+-	u32 enable;
+-
+-} AU1X00_GPIO2;
+-
+-#endif //__AU1XXX_GPIO_H
+diff -urN linux-2.6.21.1/include/asm-mips/mach-au1x00/gpio.h linux-2.6.21.1.new/include/asm-mips/mach-au1x00/gpio.h
+--- linux-2.6.21.1/include/asm-mips/mach-au1x00/gpio.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.new/include/asm-mips/mach-au1x00/gpio.h	2007-05-21 01:10:22.000000000 +0200
+@@ -0,0 +1,69 @@
+#ifndef _AU1XXX_GPIO_H_
+#define _AU1XXX_GPIO_H_
+
+#define AU1XXX_GPIO_BASE	200
+
+typedef volatile struct
+{
+	u32 dir;
+	u32 reserved;
+	u32 output;
+	u32 pinstate;
+	u32 inten;
+	u32 enable;
+
+} AU1X00_GPIO2;
+
+extern int au1xxx_gpio_get_value(unsigned gpio);
+extern void au1xxx_gpio_set_value(unsigned gpio, int value);
+extern int au1xxx_gpio_direction_input(unsigned gpio);
+extern int au1xxx_gpio_direction_output(unsigned gpio, int value);
+
+
+/* Wrappers for the arch-neutral GPIO API */
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+	/* Not yet implemented */
+	return 0;
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+	/* Not yet implemented */
+}
+
+static inline int gpio_direction_input(unsigned gpio)
+{
+	return au1xxx_gpio_direction_input(gpio);
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+	return au1xxx_gpio_direction_output(gpio, value);
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+	return au1xxx_gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+	au1xxx_gpio_set_value(gpio, value);
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+	return gpio;
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+	return irq;
+}
+
+/* For cansleep */
+#include <asm-generic/gpio.h>
+
+#endif /* _AU1XXX_GPIO_H_ */
--- a/target/linux/generic-2.6/patches/013-mips_generic_gpio_support.patch
+++ b/target/linux/generic-2.6/patches/013-mips_generic_gpio_support.patch
@ -0,0 +1,32 @@
+--- linux-2.6.21.1/arch/mips/Kconfig	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1-owrt/arch/mips/Kconfig	2007-05-24 13:51:13.000000000 +0200
+@@ -869,6 +869,10 @@
+ 	bool
+ 	default y
+ 
+config GENERIC_GPIO
+	bool
+	default n
+
+ config SCHED_NO_NO_OMIT_FRAME_POINTER
+ 	bool
+ 	default y
+--- linux-2.6.21.1/include/asm-mips/gpio.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1-owrt/include/asm-mips/gpio.h	2007-05-24 13:51:13.000000000 +0200
+@@ -0,0 +1,6 @@
+#ifndef _ASM_MIPS_GPIO_H
+#define _ASM_MIPS_GPIO_H
+
+#include <gpio.h>
+
+#endif /* _ASM_MIPS_GPIO_H */
+--- linux-2.6.21.1/arch/mips/defconfig	2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1-owrt/arch/mips/defconfig	2007-05-24 14:37:52.000000000 +0200
+@@ -71,6 +71,7 @@
+ CONFIG_GENERIC_HWEIGHT=y
+ CONFIG_GENERIC_CALIBRATE_DELAY=y
+ CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_GPIO=n
+ CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
+ # CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set
+ CONFIG_ARC=y