commit 9b614ea5c2142502b72e2c13f10925cc75ecb300
author Sumit Garg <sumit.garg@linaro.org> Mon Nov 26 16:50:17 2018 +0530
committer Tom Rini <trini@konsulko.com> Wed Dec 12 12:14:21 2018 -0500
tree 3094c913aa257de5fa0dca1b2fb1b079b357eab5
parent c9606632599c36775c3a1e5d22bf7e3506943622

qemu-arm: Add persistent environment support

Currently on qemu-arm platforms environment is kept in RAM. Instead
use pflash device 1 to provide persistent environment support across
device reset.

Also (optionally) provide support for persistent environment across
qemu machine OFF/ON using following instructions:

- Create envstore.img using qemu-img:
    qemu-img create -f raw envstore.img 64M
- Add a pflash drive parameter to the command line:
    -drive if=pflash,format=raw,index=1,file=envstore.img

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>

configs/qemu_arm_defconfig

diff --git a/configs/qemu_arm_defconfig b/configs/qemu_arm_defconfig
index acebdc5..b75363e 100644
--- a/configs/qemu_arm_defconfig
+++ b/configs/qemu_arm_defconfig
@@ -29,3 +29,10 @@
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_PCI=y
+CONFIG_ENV_IS_IN_FLASH=y
+CONFIG_MTD=y
+CONFIG_MTD_NOR_FLASH=y
+CONFIG_FLASH_CFI_DRIVER=y
+CONFIG_CFI_FLASH=y
+CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
+CONFIG_SYS_FLASH_CFI=y