Commit 9b229fa0 authored by Catalin Marinas's avatar Catalin Marinas

Check whether the SCU was already initialised

If Linux is running in non-secure mode, this register may have been
already initialised and writing to the control register not allowed.
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 1b3a02eb
......@@ -37,6 +37,10 @@ void __init scu_enable(void __iomem *scu_base)
u32 scu_ctrl;
scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
/* already enabled? */
if (scu_ctrl & 1)
return;
scu_ctrl |= 1;
__raw_writel(scu_ctrl, scu_base + SCU_CTRL);
......
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