ARM: mach-bcm: add ARM_ERRATA_775420

ARM_ERRATA_775420 needs to be enabled.

A data cache maintenance operation which aborts, followed by an ISB,
without any DSB in-between, might lead to deadlock.

Affects: bug present in Cortex-A9 r3p0 and earlier. Fixed in r4p0.

Cortex-A9 r3p0 is used in a multitude of Broadcom parts including
the bcm21664, bcm281xx, 5301x families of devices.

Signed-off-by: Scott Branden <sbranden@broadcom.com>
Tested-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 7f6ed6c3d367b7607ef4a81556227a6de81bb7fa..daead394b75c6d1d739fb7e8761f51565c6e6082 100644 (file)
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -12,6 +12,7 @@ config ARCH_BCM_MOBILE
        select ARCH_REQUIRE_GPIOLIB
        select ARM_ERRATA_754322
        select ARM_ERRATA_764369 if SMP
+       select ARM_ERRATA_775420
        select ARM_GIC
        select GPIO_BCM_KONA
        select TICK_ONESHOT