SPI设备注册

只看该作者 · 2015-11-5 15:16

本帖最后由 qi908542785 于 2015-11-5 15:22 编辑

imx6 开发板自带的spi设备m25p80，注册设备一直失败。注册设备的代码没有修改过，只是把注册驱动的代码加载进内核中。
注册设备主要代码如下：

static int mx6q_sabresd_spi_cs[] = {
      SABRESD_ECSPI1_CS0,
};

static const struct spi_imx_master mx6q_sabresd_spi_data __initconst = {
      .chipselect    = mx6q_sabresd_spi_cs,
      .num_chipselect = ARRAY_SIZE(mx6q_sabresd_spi_cs),
};

#if defined(CONFIG_MTD_M25P80) || defined(CONFIG_MTD_M25P80_MODULE)
static struct mtd_partition imx6_sabresd_spi_nor_partitions[] = {
      {
      .name = "bootloader",
      .offset = 0,
      .size = 0x00100000,
      },
      {
      .name = "kernel",
      .offset = MTDPART_OFS_APPEND,
      .size = MTDPART_SIZ_FULL,
      },
};

static struct flash_platform_data imx6_sabresd__spi_flash_data = {
      .name = "m25p80",
      .parts = imx6_sabresd_spi_nor_partitions,
      .nr_parts = ARRAY_SIZE(imx6_sabresd_spi_nor_partitions),
      .type = "sst25vf016b",
};
#endif

static struct spi_board_info imx6_sabresd_spi_nor_device[] __initdata = {
#if defined(CONFIG_MTD_M25P80)
      {
            .modalias = "m25p80",
            .max_speed_hz = 20000000, /* max spi clock (SCK) speed in HZ */
            .bus_num = 0,
            .chip_select = 0,
            .platform_data = &imx6_sabresd__spi_flash_data,
      },
#endif
};

static void spi_device_init(void)
{
      spi_register_board_info(imx6_sabresd_spi_nor_device,
                              ARRAY_SIZE(imx6_sabresd_spi_nor_device));
}
mx6_sabresd_board_init(void)函数中：
imx6q_add_ecspi(0, &mx6q_sabresd_spi_data);
spi_device_init();

打印信息如下：
root@freescale /sys/bus/spi/drivers$ ls
ad5504  m25p80

root@freescale /sys/bus/spi/devices$ ls
没有设备，说明设备注册失败。

请问SPI注册设备还有什么需要改的吗？

只看该作者 · 2015-11-5 15:42

我是路过打酱油的，不明真相，先围观~
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1万 · 2015-11-5 15:55

楼主你好，请问你这里使用的是官网的开发板还是自己设计的板子呢？

只看该作者 · 2015-11-5 16:38

FSL_TICS_Rita 发表于 2015-11-5 15:55
楼主你好，请问你这里使用的是官网的开发板还是自己设计的板子呢？

自己的开发板，但是spi、nor flash都和官方的开发板一致，没有改动过。

只看该作者 · 2015-11-5 17:49

你的板子有设计SPI接口的Nor FLASH吗？

只看该作者 · 2015-11-5 20:15

我不太清楚您说的，只能帮顶了

只看该作者 · 2015-11-6 10:46

make menuconfig的时候没有添加M25P80的驱动吧......

只看该作者 · 2015-12-4 17:08

我不太清楚您说的，只能帮顶了
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只看该作者 · 2015-12-5 19:33

楼主问题解决了吗，能否分享下解决方法呢

SPI设备注册

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