diff --git a/flash.h b/flash.h
index cb53ad1..c2de2d0 100644
--- a/flash.h
+++ b/flash.h
@@ -87,6 +87,7 @@
 	write_gran_528bytes,	/* If less than 528 bytes are written, the unwritten bytes are undefined. */
 	write_gran_1024bytes,	/* If less than 1024 bytes are written, the unwritten bytes are undefined. */
 	write_gran_1056bytes,	/* If less than 1056 bytes are written, the unwritten bytes are undefined. */
+	write_gran_1byte_implicit_erase, /* EEPROMs and other chips with implicit erase and 1-byte writes. */
 };
 
 /*
diff --git a/flashrom.c b/flashrom.c
index 8e5d363..408c555 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -766,6 +766,10 @@
 	case write_gran_1056bytes:
 		result = need_erase_gran_bytes(have, want, len, 1056);
 		break;
+	case write_gran_1byte_implicit_erase:
+		/* Do not erase, handle content changes from anything->0xff by writing 0xff. */
+		result = 0;
+		break;
 	default:
 		msg_cerr("%s: Unsupported granularity! Please report a bug at "
 			 "flashrom@flashrom.org\n", __func__);
@@ -807,6 +811,7 @@
 	switch (gran) {
 	case write_gran_1bit:
 	case write_gran_1byte:
+	case write_gran_1byte_implicit_erase:
 		stride = 1;
 		break;
 	case write_gran_256bytes: