From aa5f8759db7e4ef693f54cbc84b4275907627b7a Mon Sep 17 00:00:00 2001
From: Michael Zoran <mzoran@crowfest.net>
Date: Fri, 14 Oct 2016 20:46:23 -0700
Subject: [PATCH] ARM64: Modify default config to get raspbian to boot

1. Enable emulation of deprecated instructions.
2. Enable ARM 8.1 and 8.2 features which are not detected at runtime.
3. Switch the default governer to powersave.
4. Include the watchdog timer driver in the kernel image rather then a module.

Tested with raspbian-jessie 2016-09-23.
---
 arch/arm64/configs/bcmrpi3_defconfig | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/configs/bcmrpi3_defconfig b/arch/arm64/configs/bcmrpi3_defconfig
index 1fcde8c1329bbf..d7406f5a462015 100644
--- a/arch/arm64/configs/bcmrpi3_defconfig
+++ b/arch/arm64/configs/bcmrpi3_defconfig
@@ -27,19 +27,23 @@ CONFIG_ARM64_VA_BITS=39
 CONFIG_SCHED_MC=y
 CONFIG_NR_CPUS=4
 CONFIG_HOTPLUG_CPU=y
+CONFIG_ARMV8_DEPRECATED=y
+CONFIG_SWP_EMULATION=y
+CONFIG_CP15_BARRIER_EMULATION=y
+CONFIG_SETEND_EMULATION=y
 
 #
 # ARMv8.1 architectural features
 #
-CONFIG_ARM64_HW_AFDBM=n
-CONFIG_ARM64_PAN=n
-CONFIG_ARM64_LSE_ATOMICS=n
-CONFIG_ARM64_VHE=n
+CONFIG_ARM64_HW_AFDBM=y
+CONFIG_ARM64_PAN=y
+CONFIG_ARM64_LSE_ATOMICS=y
+CONFIG_ARM64_VHE=y
 
 #
 # ARMv8.2 architectural features
 #
-CONFIG_ARM64_UAO=n
+CONFIG_ARM64_UAO=y
 CONFIG_ARM64_MODULE_CMODEL_LARGE=n
 CONFIG_RANDOMIZE_BASE=n
 
@@ -98,7 +102,7 @@ CONFIG_ZBOOT_ROM_TEXT=0x0
 CONFIG_ZBOOT_ROM_BSS=0x0
 CONFIG_CMDLINE="console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
 CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE=y
 CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
 CONFIG_CPU_FREQ_GOV_USERSPACE=y
 CONFIG_CPU_FREQ_GOV_ONDEMAND=y
@@ -687,7 +691,7 @@ CONFIG_SENSORS_SHTC1=m
 CONFIG_THERMAL=y
 CONFIG_THERMAL_BCM2835=y
 CONFIG_WATCHDOG=y
-CONFIG_BCM2835_WDT=m
+CONFIG_BCM2835_WDT=y
 CONFIG_UCB1400_CORE=m
 CONFIG_MFD_STMPE=y
 CONFIG_STMPE_SPI=y