[U-Boot] [PATCH] nios2: reset cfi flash before reading env

[Thomas Chou]

Flash might be in unknown state when u-boot is started with jtag.
And got wrong env data. So reset it in board early init.

Signed-off-by: Thomas Chou <thomas at wytron.com.tw>
---
 board/altera/nios2-generic/nios2-generic.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/board/altera/nios2-generic/nios2-generic.c b/board/altera/nios2-generic/nios2-generic.c
index 89848cf..b76e479 100644
--- a/board/altera/nios2-generic/nios2-generic.c
+++ b/board/altera/nios2-generic/nios2-generic.c
@@ -24,12 +24,18 @@
 
 #include <common.h>
 #include <netdev.h>
+#include <mtd/cfi_flash.h>
+#include <asm/io.h>
 
 void text_base_hook(void); /* nop hook for text_base.S */
 
 int board_early_init_f(void)
 {
 	text_base_hook();
+#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_SYS_FLASH_BASE)
+	writeb(AMD_CMD_RESET, CONFIG_SYS_FLASH_BASE);
+	writeb(FLASH_CMD_RESET, CONFIG_SYS_FLASH_BASE);
+#endif
 	return 0;
 }
 
-- 
1.7.3.4