On Wed, Sep 06, 2017 at 02:10:44PM +0800, Baolin Wang wrote:

This looks like a nice, clean driver.  A few fairly small issues though:

> +config SPI_SPRD_ADI
> +	tristate "Spreadtrum ADI controller"
> +	depends on ARCH_SPRD
> +	help
> +	  ADI driver based on SPI for Spreadtrum SoCs.
> +

I can't see any hard dependencies on the architecture - can you add an
|| COMPILE_TEST for more coverage?

> +	ret = devm_spi_register_controller(&pdev->dev, ctlr);
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to register SPI controller\n");
> +		goto free_hwlock;
> +	}

> +	spi_controller_put(ctlr);

You used devm_ to register the controller, no need to free it
explicitly.

> +static int __init sprd_adi_init(void)
> +{
> +	return platform_driver_register(&sprd_adi_driver);
> +}
> +subsys_initcall(sprd_adi_init);

Why is this subsys_initcall() and not module_platform_driver()?