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: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2009-11-04 12:16:38 +00:00
Родитель 1b3a02eb45
Коммит 9b229fa095
1 изменённых файлов: 4 добавлений и 0 удалений

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@ -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);