[U-Boot] [PATCH V3 6/6] mx6q: mx6qsabrelite: Conditionally define macros for environment in serial flash

[Eric Nelson]

The default settings store the persistent environment on SD card
and not serial flash (SPI NOR).

To use SPI NOR to save the environment instead of SD card, edit
include/configs/mx6qsabrelite.h and

- undefine CONFIG_ENV_IS_IN_MMC
- define   CONFIG_ENV_IS_IN_SPI_FLASH

The SPI driver can take as chip select the controller's chip selects 
as well as an external GPIO. The LSB byte has the value of the internal
chip select, the highest (thought as 16-bit value) contains the GPIO
number. 

The GPIO used on Sabre Lite is GP3:19 == 83.

Signed-off-by: Eric Nelson <eric.nelson at boundarydevices.com>
Acked-by: Dirk Behme <dirk.behme at de.bosch.com> 
---
 include/configs/mx6qsabrelite.h |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/include/configs/mx6qsabrelite.h b/include/configs/mx6qsabrelite.h
index e34f108..024a94c 100644
--- a/include/configs/mx6qsabrelite.h
+++ b/include/configs/mx6qsabrelite.h
@@ -174,10 +174,20 @@
 /* FLASH and environment organization */
 #define CONFIG_SYS_NO_FLASH
 
-#define CONFIG_ENV_OFFSET		(6 * 64 * 1024)
 #define CONFIG_ENV_SIZE			(8 * 1024)
+
 #define CONFIG_ENV_IS_IN_MMC
+/* #define CONFIG_ENV_IS_IN_SPI_FLASH */
+
+#if defined(CONFIG_ENV_IS_IN_MMC)
+#define CONFIG_ENV_OFFSET		(6 * 64 * 1024)
 #define CONFIG_SYS_MMC_ENV_DEV		0
+#elif defined(CONFIG_ENV_IS_IN_SPI_FLASH)
+#define CONFIG_ENV_OFFSET		(768 * 1024)
+#define CONFIG_ENV_SECT_SIZE		(8 * 1024)
+#define CONFIG_ENV_SPI_CS		0x5300
+#define CONFIG_ENV_SPI_MODE		SPI_MODE_0
+#endif
 
 #define CONFIG_OF_LIBFDT
 
-- 
1.7.1