[PATCH qemu 1/2] hw/at24c : modify at24c to support 1 byte address mode

[~ssinprem]

From: Sittisak Sinprem <ssinprem@celestca.com>

---
 hw/nvram/eeprom_at24c.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c
index 2d4d8b952f..693212b661 100644
--- a/hw/nvram/eeprom_at24c.c
+++ b/hw/nvram/eeprom_at24c.c
@@ -87,7 +87,7 @@ uint8_t at24c_eeprom_recv(I2CSlave *s)
     EEPROMState *ee = AT24C_EE(s);
     uint8_t ret;
 
-    if (ee->haveaddr == 1) {
+    if (ee->rsize > 256 && ee->haveaddr == 1) {
         return 0xff;
     }
 
@@ -104,11 +104,13 @@ int at24c_eeprom_send(I2CSlave *s, uint8_t data)
 {
     EEPROMState *ee = AT24C_EE(s);
 
-    if (ee->haveaddr < 2) {
+    if ((ee->rsize > 256 && ee->haveaddr < 2) ||
+        (ee->rsize <= 256 && ee->haveaddr < 1)) {
         ee->cur <<= 8;
         ee->cur |= data;
         ee->haveaddr++;
-        if (ee->haveaddr == 2) {
+        if ((ee->rsize > 256 && ee->haveaddr == 2) ||
+            (ee->rsize <= 256 && ee->haveaddr == 1)) {
             ee->cur %= ee->rsize;
             DPRINTK("Set pointer %04x\n", ee->cur);
         }
-- 
2.34.6