[i.MX] IMX6Q GPIO定义?

[复制链接]
5932|7
 楼主| htbsoft 发表于 2015-9-24 09:17 | 显示全部楼层 |阅读模式
ret = gpio_request_array(mx6q_sabresd_flexcan_gpios,
                        ARRAY_SIZE(mx6q_sabresd_flexcan_gpios));

static struct gpio mx6q_sabresd_flexcan_gpios[] = {
        { SABRESD_CAN1_STBY, GPIOF_OUT_INIT_LOW, "flexcan1-stby" },
};

#define SABRESD_CAN1_STBY                IMX_GPIO_NR(4, 5)

/* There's a off-by-one betweem the gpio bank number and the gpiochip */
/* range e.g. GPIO_1_5 is gpio 5 under linux */
#define IMX_GPIO_NR(bank, nr)                (((bank) - 1) * 32 + (nr))


以下的bank ,nr是什么意思?
#define IMX_GPIO_NR(bank, nr)                (((bank) - 1) * 32 + (nr))

还有IMX6Q里的GPIO口是怎么定义的,看半天没看懂,IMX集成器配置有点复杂!

zzwhz 发表于 2015-9-24 09:33 | 显示全部楼层
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mini1986 发表于 2015-9-24 10:01 | 显示全部楼层
你好好看看datasheet中的GPIO那块就应该明白了......
imx6中bank是0-7,平台不一样bank的表示也不一样,具体跟厂家有关......
nr一般是0-31,具体跟bank有关......
 楼主| htbsoft 发表于 2015-9-24 10:37 | 显示全部楼层
mini1986 发表于 2015-9-24 10:01
你好好看看datasheet中的GPIO那块就应该明白了......
imx6中bank是0-7,平台不一样bank的表示也不一样,具 ...



如图
IMX6Q GPIO.png
 楼主| htbsoft 发表于 2015-9-24 10:42 | 显示全部楼层

看了下原理图和datasheet,还是没搞明白,GPIO_19 和 如下定义
#define SABRESD_CAN1_STBY                IMX_GPIO_NR(4, 5)
#define IMX_GPIO_NR(bank, nr)                (((bank) - 1) * 32 + (nr))
是什么关系?
mini1986 发表于 2015-9-24 10:50 | 显示全部楼层
htbsoft 发表于 2015-9-24 10:42
看了下原理图和datasheet,还是没搞明白,GPIO_19 和 如下定义
#define SABRESD_CAN1_STBY                IMX_G ...

问你们硬件工程师到底要实现个什么功能......我也没看明白......
史迪威将军 发表于 2015-9-24 13:10 | 显示全部楼层
说实话我也没有看明白
跟屁虫 发表于 2015-9-24 21:32 | 显示全部楼层
这个看起来很麻烦啊
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