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关于spi ioctr函数问题,求教
发表于 2016-1-20 10:15:13
浏览:7928
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回复:3
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现象:
我在spi驱动中的 file_operations s中有如下定义:
static const struct file_operations spidev_fops = {
.owner = THIS_MODULE,
/* REVISIT switch to aio primitives, so that userspace
* gets more complete API coverage. It'll simplify things
* too, except for the locking.
*/
.write = spidev_write,
.read = spidev_read,
.unlocked_ioctl = spidev_ioctl,
.compat_ioctl = spidev_compat_ioctl,
.open = spidev_open,
.release = spidev_release,
.llseek = no_llseek,
};
应用程序中调用:
compat_ioctl(handle_spi1dev, SPI_IOC_WR_BITS_PER_WORD,&cmd)
在编译时出现: linux/spi/spi.h:没有那个文件或目录?
请问,我如何才能调用驱动中定义的compat_ioctl? |
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