[PATCH] mips/octeon: 16-Bit NOR flash was not being detected during boot
From: Charles Hardin <hidden>
Date: 2012-09-07 21:22:01
Subsystem:
mips, the rest · Maintainers:
Thomas Bogendoerfer, Linus Torvalds
The cavium code assumed that all NOR on the boot bus was an 8-bit NOR part and hardcoded the bankwidth. The simple solution was to add the code that queries the configuration register for the width of the bus that has been hardware strapped to the Cavium. This allows both 8-bit and 16-bit parts to be discovered during boot. Acked-by: David Daney <redacted> Signed-off-by: Charles Hardin <redacted>
diff --git a/arch/mips/cavium-octeon/flash_setup.c b/arch/mips/cavium-octeon/flash_setup.c
index e44a55b..237e5b1 100644
--- a/arch/mips/cavium-octeon/flash_setup.c
+++ b/arch/mips/cavium-octeon/flash_setup.c@@ -51,7 +51,8 @@ static int __init flash_init(void) flash_map.name = "phys_mapped_flash"; flash_map.phys = region_cfg.s.base << 16; flash_map.size = 0x1fc00000 - flash_map.phys; - flash_map.bankwidth = 1; + /* 8-bit bus (0 + 1) or 16-bit bus (1 + 1) */ + flash_map.bankwidth = region_cfg.s.width + 1; flash_map.virt = ioremap(flash_map.phys, flash_map.size); pr_notice("Bootbus flash: Setting flash for %luMB flash at " "0x%08llx\n", flash_map.size >> 20, flash_map.phys);