On Tue, Mar 17, 2015 at 01:32:21AM -0700, Paul Walmsley wrote:
> static inline u32 gizmo_readl(struct tegra_ahb *ahb, u32 offset)
> {
> - return readl(ahb->regs - 4 + offset);
> + return readl(ahb->regs + ahb->offset + offset);
> }
>
> static inline void gizmo_writel(struct tegra_ahb *ahb, u32 value, u32 offset)
> {
> - writel(value, ahb->regs - 4 + offset);
> + writel(value, ahb->regs + ahb->offset + offset);
Rather than storing the offset...
> @@ -262,18 +283,15 @@ static int tegra_ahb_probe(struct platform_device *pdev)
> if (IS_ERR(ahb->regs))
> return PTR_ERR(ahb->regs);
>
> + ad = of_id->data;
> ahb->dev = &pdev->dev;
> + ahb->offset = ad->offset;
What about
ahb->regs += ad->offset;
here and avoid the addition and extra loads on every access.
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according to speedtest.net.
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