From 3b10cf120befe9c2e938a7d4e04eb0b545ee347a Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Fri, 19 Jun 2015 20:25:59 +1200 Subject: [PATCH] README: Describe CONFIG_SYS_NO_FLASH Unlike most configuration options defining this actually disables support for a feature (parallel flash). Eventually the logic behind this should probably be flipped so that '#ifndef CONFIG_SYS_NO_FLASH' becomes '#ifdef CONFIG_HAS_PARALLEL_FLASH' but for now lets document the existing behaviour. Signed-off-by: Chris Packham Reviewed-by: Stefan Roese --- README | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/README b/README index 3b406c2..c3fa549 100644 --- a/README +++ b/README @@ -3037,6 +3037,19 @@ CBFS (Coreboot Filesystem) support this is instead controlled by the value of /config/load-environment. +- Parallel Flash support: + CONFIG_SYS_NO_FLASH + + Traditionally U-boot was run on systems with parallel NOR + flash. This option is used to disable support for parallel NOR + flash. This option should be defined if the board does not have + parallel flash. + + If this option is not defined one of the generic flash drivers + (e.g. CONFIG_FLASH_CFI_DRIVER or CONFIG_ST_SMI) must be + selected or the board must provide an implementation of the + flash API (see include/flash.h). + - DataFlash Support: CONFIG_HAS_DATAFLASH -- 2.7.4