MLK-11115 arm: imx: double check m4 is enabled

Make a double check that m4 is enabled and run on imx7d

Signed-off-by: Richard Zhu <Richard.Zhu@freescale.com>
(cherry picked from commit 276fe0947a13c74dad003b0fc3735d389928c1e3)

diff --git a/arch/arm/mach-imx/src.c b/arch/arm/mach-imx/src.c
index 7441354..c53b6da 100644 (file)
--- a/arch/arm/mach-imx/src.c
+++ b/arch/arm/mach-imx/src.c
@@ -170,7 +170,7 @@ void __init imx_src_init(void)
 
        if (cpu_is_imx7d()) {
                val = readl_relaxed(src_base + SRC_M4RCR);
-               if ((val & BIT(3)) == BIT(3))
+               if (((val & BIT(3)) == BIT(3)) && !(val & BIT(0)))
                        m4_is_enabled = true;
                else
                        m4_is_enabled = false;