linux-imx

    INIT_LIST_HEAD(&c->queue);

    init_waitqueue_head(&c->waitq);

​

    c->clk = devm_clk_get(&dev->dev, "spi-baseclk");

    if (IS_ERR(c->clk)) {

        ret = PTR_ERR(c->clk);

        c->clk = NULL;

        goto exit;

    }

    if (ret) {

        c->clk = NULL;

        goto exit;

    }

    c->baseclk = clk_get_rate(c->clk);

    master->min_speed_hz = DIV_ROUND_UP(c->baseclk, SPI_MAX_DIVIDER + 1);

    master->max_speed_hz = c->baseclk / (SPI_MIN_DIVIDER + 1);

​

    res = platform_get_resource(dev, IORESOURCE_MEM, 0);

    c->membase = devm_ioremap_resource(&dev->dev, res);

    master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);

​

    ret = devm_spi_register_master(&dev->dev, master);

    if (ret)

        goto exit;

    return 0;

exit_busy:

    ret = -EBUSY;

exit:

    spi_master_put(master);

    return ret;

}

​

static int txx9spi_remove(struct platform_device *dev)

{

    struct spi_master *master = platform_get_drvdata(dev);

    struct txx9spi *c = spi_master_get_devdata(master);

​

    flush_work(&c->work);

    return 0;

}

​

/* work with hotplug and coldplug */

MODULE_ALIAS("platform:spi_txx9");

​

static struct platform_driver txx9spi_driver = {

    .probe = txx9spi_probe,

    .remove = txx9spi_remove,

    .driver = {