[U-Boot-Users] [PATCH] DataFlash AT45DB021 support

[Sergey Lapin]

Some boards based on AT91SAM926X-EK use smaller DF chips to keep
bootstrap, u-boot and its environment, using NAND or other external
storage for kernel and rootfs. This patch adds support for
small 1024x263 chip.

Signed-off-by: Sergey Lapin <slapin at ossfans.org>
---
 drivers/mtd/dataflash.c |   15 ++++++++++++++-
 include/dataflash.h     |    1 +
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/dataflash.c b/drivers/mtd/dataflash.c
index 8247aa0..92accc0 100644
--- a/drivers/mtd/dataflash.c
+++ b/drivers/mtd/dataflash.c
@@ -52,8 +52,18 @@ int AT91F_DataflashInit (void)
 		dataflash_info[i].Device.pages_number = 0;
 		dfcode = AT91F_DataflashProbe (cs[i].cs,
 				&dataflash_info[i].Desc);
-
 		switch (dfcode) {
+		case AT45DB021:
+			dataflash_info[i].Device.pages_number = 1024;
+			dataflash_info[i].Device.pages_size = 263;
+			dataflash_info[i].Device.page_offset = 9;
+			dataflash_info[i].Device.byte_mask = 0x300;
+			dataflash_info[i].Device.cs = cs[i].cs;
+			dataflash_info[i].Desc.DataFlash_state = IDLE;
+			dataflash_info[i].logical_address = cs[i].addr;
+			dataflash_info[i].id = dfcode;
+			found[i] += dfcode;;
+			break;
 		case AT45DB161:
 			dataflash_info[i].Device.pages_number = 4096;
 			dataflash_info[i].Device.pages_size = 528;
@@ -178,6 +188,9 @@ void dataflash_print_info (void)
 		if (dataflash_info[i].id != 0) {
 			printf("DataFlash:");
 			switch (dataflash_info[i].id) {
+			case AT45DB021:
+				printf("AT45DB021\n");
+				break;
 			case AT45DB161:
 				printf("AT45DB161\n");
 				break;
diff --git a/include/dataflash.h b/include/dataflash.h
index f20c738..11e5188 100644
--- a/include/dataflash.h
+++ b/include/dataflash.h
@@ -137,6 +137,7 @@ struct dataflash_addr {
 /*-------------------------------------------------------------------------------------------------*/
 
 #define AT45DB161	0x2c
+#define AT45DB021	0x14
 #define AT45DB321	0x34
 #define AT45DB642	0x3c
 #define AT45DB128	0x10
-- 
1.5.4.1