board/ti/am335x: add support for BeagleBone Green

SeeedStudio BeagleBone Green (BBG) is clone of the BeagleBone Black (BBB) minus
the HDMI port and addition of two Grove connectors (i2c2 and usart2).

This board can be identified by the 1A value after A335BNLT (BBB) in the at24 eeprom:
1A: [aa 55 33 ee 41 33 33 35  42 4e 4c 54 1a 00 00 00 |.U3.A335BNLT....|]

http://beagleboard.org/green
http://www.seeedstudio.com/wiki/Beaglebone_green

In Mainline Kernel as of:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79a4e64c679d8a0b1037da174e4aea578c80c4e6

Patch tested on BeagleBone Black (rev C) and BeagleBone Green (production model)

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
CC: Tom Rini <trini@konsulko.com>
CC: Jason Kridner <jkridner@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index f0cb1e204ad550622df7848a993f1eb2f173bc43..f56d17ec58e17a6532b5df649249b4038b475897 100644 (file)
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -507,9 +507,15 @@ int board_late_init(void)
        safe_string[sizeof(header.name)] = 0;
        setenv("board_name", safe_string);
 
-       strncpy(safe_string, (char *)header.version, sizeof(header.version));
-       safe_string[sizeof(header.version)] = 0;
-       setenv("board_rev", safe_string);
+       /* BeagleBone Green eeprom, board_rev: 0x1a 0x00 0x00 0x00 */
+       if ( (header.version[0] == 0x1a) && (header.version[1] == 0x00) &&
+            (header.version[2] == 0x00) && (header.version[3] == 0x00) ) {
+               setenv("board_rev", "BBG1");
+       } else {
+               strncpy(safe_string, (char *)header.version, sizeof(header.version));
+               safe_string[sizeof(header.version)] = 0;
+               setenv("board_rev", safe_string);
+       }
 #endif
 
        return 0;

diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index d58816d61d7572008b806e5595645c633a8e177e..ed3fd344881ed53c55ac35a104459d673a91b0f2 100644 (file)
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -186,7 +186,12 @@
                "if test $board_name = A335BONE; then " \
                        "setenv fdtfile am335x-bone.dtb; fi; " \
                "if test $board_name = A335BNLT; then " \
-                       "setenv fdtfile am335x-boneblack.dtb; fi; " \
+                       "if test $board_rev = BBG1; then " \
+                               "setenv fdtfile am335x-bonegreen.dtb; " \
+                       "else " \
+                               "setenv fdtfile am335x-boneblack.dtb; " \
+                       "fi; " \
+               "fi; " \
                "if test $board_name = A33515BB; then " \
                        "setenv fdtfile am335x-evm.dtb; fi; " \
                "if test $board_name = A335X_SK; then " \