ARM: imx: mask gpc interrupts initially

Mask gpc interrupts initially to avoid suspicious interrupts.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
index e1537f9e45b858571bdfa794be8f86507e06cadd..722e5df7e44ed4b8b9f07c78eb8fcd2ecc20e67d 100644 (file)
--- a/arch/arm/mach-imx/gpc.c
+++ b/arch/arm/mach-imx/gpc.c
@@ -101,11 +101,16 @@ static void imx_gpc_irq_mask(struct irq_data *d)
 void __init imx_gpc_init(void)
 {
        struct device_node *np;
+       int i;
 
        np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-gpc");
        gpc_base = of_iomap(np, 0);
        WARN_ON(!gpc_base);
 
+       /* Initially mask all interrupts */
+       for (i = 0; i < IMR_NUM; i++)
+               writel_relaxed(~0, gpc_base + GPC_IMR1 + i * 4);
+
        /* Register GPC as the secondary interrupt controller behind GIC */
        gic_arch_extn.irq_mask = imx_gpc_irq_mask;
        gic_arch_extn.irq_unmask = imx_gpc_irq_unmask;