[PATCHv4 2/2] clk: keystone: Add sci-clk driver support

[Stephen Boyd]

On 05/22, Tero Kristo wrote:
> +
> +/**
> + * ti_sci_clk_probe - Probe function for the TI SCI clock driver
> + * @pdev: platform device pointer to be probed
> + *
> + * Probes the TI SCI clock device. Allocates a new clock provider
> + * and registers this to the common clock framework. Also applies
> + * any required flags to the identified clocks via clock lists
> + * supplied from DT. Returns 0 for success, negative error value
> + * for failure.
> + */
> +static int ti_sci_clk_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct device_node *np = dev->of_node;
> +	struct sci_clk_provider *provider;
> +	const struct ti_sci_handle *handle;
> +	struct sci_clk_data *data;
> +	int ret;
> +
> +	data = (struct sci_clk_data *)of_device_get_match_data(dev);

It would be nice to avoid this cast, and also check for NULL
here. I tried to do it in a few minutes but then that caused a
problem with throwing away const on sci_clk_data. Can this be
resolved? We probably shouldn't be assigning the
sci_clk_data::clocks member anyway if the structure is const
assuming it goes into the read-only section. It may cause some
restructuring of the code though.

> +
> +	handle = devm_ti_sci_get_handle(dev);
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
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