From c62491d2602b353a815a909e27eec0df9f2c06a2 Mon Sep 17 00:00:00 2001 From: John Schmoller Date: Wed, 29 Sep 2010 14:05:44 -0500 Subject: [PATCH] ppc: Don't initialize write protected NOR flashes If a NOR flash is write protected it can not be initialized/detected so add the ability for boards to skip NOR initialization on bootup. A board can skip NOR initialization by implementing the board_flash_wp_on() function. Signed-off-by: John Schmoller Signed-off-by: Peter Tyser CC: sr@denx.de Acked-by: Stefan Roese --- arch/powerpc/lib/board.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c index c0c7fd4f6e..2e0749da0a 100644 --- a/arch/powerpc/lib/board.c +++ b/arch/powerpc/lib/board.c @@ -175,6 +175,16 @@ void __board_add_ram_info(int use_default) } void board_add_ram_info(int) __attribute__((weak, alias("__board_add_ram_info"))); +int __board_flash_wp_on(void) +{ + /* + * Most flashes can't be detected when write protection is enabled, + * so provide a way to let U-Boot gracefully ignore write protected + * devices. + */ + return 0; +} +int board_flash_wp_on(void) __attribute__((weak, alias("__board_flash_wp_on"))); static int init_func_ram (void) { @@ -698,7 +708,11 @@ void board_init_r (gd_t *id, ulong dest_addr) #if !defined(CONFIG_SYS_NO_FLASH) puts ("FLASH: "); - if ((flash_size = flash_init ()) > 0) { + if (board_flash_wp_on()) { + printf("Uninitialized - Write Protect On\n"); + /* Since WP is on, we can't find real size. Set to 0 */ + flash_size = 0; + } else if ((flash_size = flash_init ()) > 0) { # ifdef CONFIG_SYS_FLASH_CHECKSUM print_size (flash_size, ""); /* -- 2.39.2