[PATCH v2] sunxi: defconfig: Add pstore support for pinephone

[Andrey Skvortsov]

pstore will allow users to catch kernel crashes and report them to
developers. Modern (Android) phones have pstore usually enabled to get
information about kernel crash, since it's the simplest way to get
kernel backtrace on mobile device without serial console. Usually it's
enabled by default in distribution kernels like Debian.

CONFIG_PSTORE=y
CONFIG_PSTORE_RAM=m

systemd has service that automatically handles pstore and saves them
in /var/lib/pstore for later usage.

In general any DRAM address, that isn't overwritten during a boot is
suitable for pstore.

Range from 0x40000000 - 0x50000000 is heavily used by u-boot for
internal use and to load kernel, fdt, fdto, scripts, pxefile and ramdisk
later in the boot process. Ramdisk start address is 0x4FF00000,
initramfs for kernel with some hacking features and debug info enabled
can take more than 100Mb and final address will be around 0x58000000.
Address 0x61000000 will most likely not overlap with that.

Signed-off-by: Andrey Skvortsov <andrej.skvortzov at gmail.com>
---

Changes since v1:
 - updated description with pstore usage details

 configs/pinephone_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configs/pinephone_defconfig b/configs/pinephone_defconfig
index 9d39204a439..7b80cc3131b 100644
--- a/configs/pinephone_defconfig
+++ b/configs/pinephone_defconfig
@@ -10,6 +10,8 @@ CONFIG_DRAM_ZQ=3881949
 CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_PINEPHONE_DT_SELECTION=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_CMD_PSTORE=y
+CONFIG_CMD_PSTORE_MEM_ADDR=0x61000000
 CONFIG_OF_LIST="sun50i-a64-pinephone-1.1 sun50i-a64-pinephone-1.2"
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS_GPIO=y
-- 
2.45.2