[PATCH 1/6] clk: sunxi: Add support for sun9i a80 usb clocks and resets

[Russell King - ARM Linux]

On Tue, Nov 04, 2014 at 12:07:14PM +0800, Chen-Yu Tsai wrote:
> +	spin_lock_irqsave(data->lock, flags);
> +
> +	reg = readl(data->reg);
> +	writel(reg & ~BIT(id), data->reg);
> +
> +	spin_unlock_irqrestore(data->lock, flags);

Don't we have generic support for atomic modification of register
values?  Hmm, we have it for ARM only - atomic_io_modify() and
atomic_io_modify_relaxed().

I guess we should push for those to become cross-arch if we end up
with generic drivers shared between other architectures.

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