memory: tegra: Use relaxed versions of readl/writel

digetx · joergroedel · commit 45594c683ef7 · 2019-01-16T13:54:12.000+01:00
There is no need for inserting of memory barriers to access registers of
Memory Controller. Hence use the relaxed versions of the accessors.

Signed-off-by: Dmitry Osipenko &lt;digetx@gmail.com&gt;
Acked-by: Thierry Reding &lt;treding@nvidia.com&gt;
Signed-off-by: Joerg Roedel &lt;jroedel@suse.de&gt;
diff --git a/drivers/memory/tegra/mc.h b/drivers/memory/tegra/mc.h
@@ -26,13 +26,13 @@
 
 static inline u32 mc_readl(struct tegra_mc *mc, unsigned long offset)
 {
-	return readl(mc->regs + offset);
+	return readl_relaxed(mc->regs + offset);
 }
 
 static inline void mc_writel(struct tegra_mc *mc, u32 value,
 			     unsigned long offset)
 {
-	writel(value, mc->regs + offset);
+	writel_relaxed(value, mc->regs + offset);
 }
 
 extern const struct tegra_mc_reset_ops terga_mc_reset_ops_common;

Original file line number	Diff line number	Diff line change
`@@ -26,13 +26,13 @@`
`26`	`26`
`27`	`27`	`static inline u32 mc_readl(struct tegra_mc *mc, unsigned long offset)`
`28`	`28`	`{`
`29`		`- return readl(mc->regs + offset);`
	`29`	`+ return readl_relaxed(mc->regs + offset);`
`30`	`30`	`}`
`31`	`31`
`32`	`32`	`static inline void mc_writel(struct tegra_mc *mc, u32 value,`
`33`	`33`	`unsigned long offset)`
`34`	`34`	`{`
`35`		`- writel(value, mc->regs + offset);`
	`35`	`+ writel_relaxed(value, mc->regs + offset);`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`extern const struct tegra_mc_reset_ops terga_mc_reset_ops_common;`