qi-delay-after-stop.patch

Bitbang I2C could do with delay after last stop before next back-back transaction

Signed-off-by: Andy Green <andy@openmoko.com>

qiboot/include/i2c-bitbang.h

@@ -53,7 +53,8 @@ enum i2c_bitbang_states {
 
 	IBS_STOP1,
 	IBS_STOP2,
-	IBS_STOP3
+	IBS_STOP3,
+	IBS_STOP4
 };
 
 /* context for bitbang GPIO pins and transaction */

qiboot/src/drivers/i2c-bitbang.c

@@ -193,6 +193,11 @@ int i2c_next_state(struct i2c_bitbang * bb)
 		break;
 
 	case IBS_STOP3:
+		(bb->set)(1, 1);
+		bb->state = IBS_STOP4;
+		break;
+
+	case IBS_STOP4:
 		(bb->set)(1, 1);
 		return 1; /* done */
 	}