[PATCH v3 RESEND 2/3] nvram: at24c: use a sane default for "rom-size"

[Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>]

0 as "rom-size" will lead to an error message. Let's use the size of a
small 24c01 which has 128 byte.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
 hw/nvram/eeprom_at24c.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c
index ccf78b25e4..ab1ef686e2 100644
--- a/hw/nvram/eeprom_at24c.c
+++ b/hw/nvram/eeprom_at24c.c
@@ -28,6 +28,9 @@
 #define TYPE_AT24C_EE "at24c-eeprom"
 #define AT24C_EE(obj) OBJECT_CHECK(EEPROMState, (obj), TYPE_AT24C_EE)
 
+/* default is the size of a 24c01 EEPROM */
+#define AT24C_ROMSIZE_DEFAULT 128
+
 typedef struct EEPROMState {
     I2CSlave parent_obj;
 
@@ -171,7 +174,7 @@ void at24c_eeprom_reset(DeviceState *state)
 }
 
 static Property at24c_eeprom_props[] = {
-    DEFINE_PROP_UINT32("rom-size", EEPROMState, rsize, 0),
+    DEFINE_PROP_UINT32("rom-size", EEPROMState, rsize, AT24C_ROMSIZE_DEFAULT),
     DEFINE_PROP_BOOL("writable", EEPROMState, writable, true),
     DEFINE_PROP_DRIVE("drive", EEPROMState, blk),
     DEFINE_PROP_END_OF_LIST()
-- 
2.11.0