WhyCan Forum(哇酷开发者社区)

勾选驱动，配置设备树

自己改的写了 设备驱动 没有成功点亮oled
oled_probe 是否有问题

static int oled_probe(struct spi_device *spi)
{
    int ret = 0;
    oled_dev.spi_oled_dev = spi;
    struct device *dev = &spi->dev;
   
    ret = spi_setup(spi);
    if (ret)
        return ret;
    oled_dev.node = dev->of_node;

    if(oled_dev.node == NULL){
        printk("fail_get_node\r\n");
    }

    oled_dev.spi_oled_dc_pin = of_get_named_gpio(oled_dev.node, "dc-gpio", 0);

    if(oled_dev.spi_oled_dc_pin<0){
        ret = -EINVAL;
        goto fail_get_node;
    }
    oled_dev.spi_oled_rst_pin = of_get_named_gpio(oled_dev.node, "rst-gpio", 0);
    if(oled_dev.spi_oled_rst_pin<0){
        ret = -EINVAL;
        goto fail_get_node;
    }
    printk("request gpio %d\r\n", oled_dev.spi_oled_dc_pin);

    ret = gpio_direction_output(oled_dev.spi_oled_dc_pin, 0);
    if(ret<0){
        printk("can't gpio_direction_output gpio  %d\r\n", oled_dev.spi_oled_dc_pin);
        goto setout_fail;
    }
    ret = gpio_direction_output(oled_dev.spi_oled_rst_pin, 0);
    if(ret<0){
        printk("can't gpio_direction_output gpio  %d\r\n", oled_dev.spi_oled_rst_pin);
        goto setout_fail;
    }
    oled_dev.major = register_chrdev(0, "oled", &oled_ops);

    oled_dev.class = class_create(THIS_MODULE, "oled");
    printk("matched\r\n");

    device_create(oled_dev.class, NULL, MKDEV(oled_dev.major, 0), NULL, DRIVER_NAME);
    OLEDInit();

    // OLED_Set_DC(0);
    // OLED_Set_RST(0);
    return 0;
setout_fail:
fail_get_node:
    return ret;
}

逻辑分析仪怼不上去,出问题了 怎么改大神 们,怎么调