请教i2c驱动测试

我在开发板上通过i2c总线扩展了两片pcf8574，用于扩展io口。由于内核已经有了pcf8574的驱动，我将其编译进了内核。之前经版主提点，可以通过i2c interface来对i2c驱动进行测试，然后我看了相关的文档，自己写了一个简单的测试程序，但程序运行时，无法设置i2c从设备的地址，程序如下：
#include <stdio.h>
#include <fcntl.h>

#include <linux/i2c.h>
#include <linux/i2c-dev.h>

int main (int argc, char ** argv)
{
    int file;
    if ( file = open("/dev/i2c/0",O_RDWR) < 0 )
    {
        printf("Can not open i2c device\n");
        exit(1);
    }

    int addr = 0x20;
    if(ioctl(file,I2C_SLAVE,addr) < 0)
    {
        printf("Can not set i2c address\n");
        exit(1);
    }
。。。。。。

程序每次执行到这里，就跳出，并打印Can not set i2c address。我怀疑是设备地址的问题，然后将地址改为addr = 0x50，即开发板上自带的i2c eeprom的地址，但依然不行。请教一下各位，到底问题出现在哪里呢？谢谢了

把ioctl(file,I2C_SLAVE,addr)的返回值打印出来

返回值为-1

不论是0x20（pcf8574从设备地址），还是0x50（开发板自带的eeprom），返回值都是-1

抱歉，我想我指的是errno的值，你可以用

复制代码   if(ioctl(file,I2C_SLAVE,addr) < 0)     {         printf("Can not set i2c address (%d)\n", errno);         exit(1);     }

将其值打印出来

不好意思，是我太菜了。
我在代码上加入#include <errno.h>
然后打印出来是22，查了一下errno.h的定义，上面说的是EINVAL, 参数不合法

这是IIC驱动中ioctl()的处理函数(源代码在drivers/i2c/i2c-dev.c)

复制代码 static long i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) {     struct i2c_client *client = (struct i2c_client *)file->private_data;     unsigned long funcs;     dev_dbg(&client->adapter->dev, "ioctl, cmd=0x%02x, arg=0x%02lx\n",         cmd, arg);     switch ( cmd ) {     case I2C_SLAVE:     case I2C_SLAVE_FORCE:         /* NOTE:  devices set up to work with "new style" drivers          * can't use I2C_SLAVE, even when the device node is not          * bound to a driver.  Only I2C_SLAVE_FORCE will work.          *          * Setting the PEC flag here won't affect kernel drivers,          * which will be using the i2c_client node registered with          * the driver model core.  Likewise, when that client has          * the PEC flag already set, the i2c-dev driver won't see          * (or use) this setting.          */         if ((arg > 0x3ff) ||             (((client->flags & I2C_M_TEN) == 0) && arg > 0x7f))             return -EINVAL;         if (cmd == I2C_SLAVE && i2cdev_check_addr(client->adapter, arg))             return -EBUSY;         /* REVISIT: address could become busy later */         client->addr = arg;         return 0;

按照代码的逻辑来看，EINVAL只有在arg值非法的情况下才会返回（0x20和0x50不是非法值）。你在这里加几个printk()看看是哪里返回出错了吧。

我想请教一下版主，在linux内核中，存在pcf8574芯片的驱动，但在应用程序中，好像一直没有调用这个文件，而是调用i2c-dev.c文件。我想问一下，i2c-dev.c是否是i2c的通用驱动程序？而如果想使用pcf8574驱动文件，应如何调用呢？

是的，你可以理解为i2c-dev.c是userspace应用程序通过/dev/i2c*节点操作i2c设备的通用驱动。至于内核里的pcf8574驱动，那不是给应用程序的，而是供内核中的其他驱动通过内核内部的接口操作pcf8574的。

之前我用arm-linux-gcc-3.4.1编译出错，arm-linux-2.95.3编译通过，但运行错误，提示EINVAL..我想会不会是交叉编译器有问题呢？
出错信息如下：
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/timex.h:186,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:11,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/time.h:9: error: redefinition of `struct timespec'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/time.h:15: error: redefinition of `struct timeval'
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:12,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/jiffies.h:16: error: parse error before "jiffies_64"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/jiffies.h:20: error: parse error before "get_jiffies_64"
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:18,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h:18: error: parse error before "wait_queue_head_t"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h: In function `sema_init':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h:46: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h:47: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h:48: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h: In function `sema_count':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/semaphore.h:66: error: dereferencing pointer to incomplete type
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/signal.h:4,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:25,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/list.h:682:2: warning: #warning "don't include kernel headers in userspace"
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/signal.h:6,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:25,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/signal.h: At top level:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/signal.h:27: error: conflicting types for 'sigset_t'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/sys/select.h:38: error: previous declaration of 'sigset_t' was here
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/siginfo.h:4,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/signal.h:7,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:25,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/siginfo.h:75: error: parse error before "clock_t"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/siginfo.h:92: error: parse error before '}' token
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/siginfo.h:93: error: parse error before '}' token
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:29,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/completion.h:15: error: parse error before "wait_queue_head_t"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/completion.h: In function `init_completion':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/completion.h:26: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/completion.h:27: error: dereferencing pointer to incomplete type
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:30,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/pid.h: At top level:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/pid.h:18: error: field `task_list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/pid.h:19: error: field `hash_chain' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/pid.h:24: error: field `pid_chain' has incomplete type
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:31,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/percpu.h: In function `__alloc_percpu':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/percpu.h:45: error: `GFP_KERNEL' undeclared (first use in this function)
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/percpu.h:45: error: (Each undeclared identifier is reported only once
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/percpu.h:45: error: for each function it appears in.)
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/sched.h:102,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:10,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/timer.h: At top level:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/timer.h:12: error: field `entry' has incomplete type
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm/local.h:1,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/module.h:21,
                 from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:31,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h: In function `local_inc':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:65: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:65: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h: In function `local_dec':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:72: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:72: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h: In function `local_add':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:79: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:79: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h: In function `local_sub':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:86: error: invalid type argument of `->'
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/asm-generic/local.h:86: error: invalid type argument of `->'
In file included from /usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:34,
                 from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h: At top level:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:53: error: field `subsys' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:54: error: field `drivers' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:55: error: field `devices' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:61: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:87: error: field `attr' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:106: error: field `unload_sem' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:107: error: field `kobj' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:108: error: field `devices' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:113: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:114: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:128: error: field `attr' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:150: error: field `subsys' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:151: error: field `children' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:152: error: field `interfaces' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:169: error: field `attr' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:186: error: field `node' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:188: error: field `kobj' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:193: error: `KOBJ_NAME_LEN' undeclared here (not in a function)
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:221: error: field `attr' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:240: error: field `node' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:261: error: field `node' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:262: error: field `bus_list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:263: error: field `driver_list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:264: error: field `children' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:267: error: field `kobj' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:276: error: field `power' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:277: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:283: error: parse error before "detach_state"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:286: error: parse error before '*' token
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:287: error: parse error before "coherent_dma_mask"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:296: error: parse error before '}' token
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h: In function `list_to_dev':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:301: error: parse error before "struct"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h: In function `dev_get_drvdata':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:307: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h: In function `dev_set_drvdata':
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:313: error: dereferencing pointer to incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h: At top level:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:339: error: field `attr' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:379: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:381: error: parse error before "num_resources"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:383: error: parse error before '}' token
In file included from pcf8574_test.c:4:
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:74: error: parse error before "i2c_smbus_xfer"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:74: error: parse error before "u16"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:82: error: parse error before "i2c_smbus_write_quick"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:82: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:83: error: parse error before "i2c_smbus_read_byte"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:84: error: parse error before "i2c_smbus_write_byte"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:84: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:85: error: parse error before "i2c_smbus_read_byte_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:85: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:86: error: parse error before "i2c_smbus_write_byte_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:87: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:88: error: parse error before "i2c_smbus_read_word_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:88: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:89: error: parse error before "i2c_smbus_write_word_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:90: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:91: error: parse error before "i2c_smbus_process_call"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:92: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:94: error: parse error before "i2c_smbus_read_block_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:95: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:96: error: parse error before "i2c_smbus_write_block_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:97: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:99: error: parse error before "i2c_smbus_read_i2c_block_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:100: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:101: error: parse error before "i2c_smbus_write_i2c_block_data"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:102: error: parse error before "u8"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:141: error: field `list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:167: error: field `dev' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:168: error: field `list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:170: error: field `released' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:207: error: parse error before "u16"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:219: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:239: error: field `bus_lock' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:240: error: field `clist_lock' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:244: error: field `dev' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:253: error: field `clients' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:254: error: field `list' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:256: error: field `dev_released' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:257: error: field `class_dev_released' has incomplete type
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:385: error: parse error before "i2c_get_functionality"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/i2c.h:388: error: parse error before "u32"
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:293: error: storage size of `dma_pools' isn't known
/usr/local/arm/3.4.1/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/sys-include/linux/device.h:380: error: storage size of `dev' isn't known