RK3399平台开发系列讲解（内核子系统篇）2.22、gpio子系统之register a gpio_chip

drivers/gpio/gpiolib.c -1/4

/**
 * gpiochip_add_data() - register a gpio_chip
 * @chip: the chip to register, with chip->base initialized
 * @data: driver-private data associated with this chip
 *
 * Context: potentially before irqs will work
 *
 * When gpiochip_add_data() is called very early during boot, so that GPIOs
 * can be freely used, the chip->parent device must be registered before
 * the gpio framework's arch_initcall().  Otherwise sysfs initializatio
  

 

  
1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
 

文章来源: xuesong.blog.csdn.net，作者：内核笔记，版权归原作者所有，如需转载，请联系作者。

原文链接：xuesong.blog.csdn.net/article/details/115644142