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 <judge.pack...@gmail.com>
---
So this is my attempt to describe (my understanding of) how this option
should be used. Any suggestions for improvement are most welcome.
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
--
2.3.5
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