[PATCH] aspeed: Enable backend file for eeprom

[John Wang]

tested on a fp5280g2:

$QEMU_BIN -machine fp5280g2-bmc \
          -nographic \
          -drive file="${IMAGE_PATH}",format=raw,if=mtd \
          -drive file="eeprom.bin",format=raw,if=pflash,index=1 \
          ${NIC}

root@fp5280g2:/sys/bus/i2c/devices/1-0050# hexdump eeprom -C
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
....
....
00000240  2c 87 a3 a4 1d d3 11 b2  02 d2 c2 9d 44 60 cf 3e  |,...........D`.>|
00000250  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

It's same as the "eeprom.bin"

Signed-off-by: John Wang <wangzhiqiang02@inspur.com>
Change-Id: I5c44785a028144b24aa0b22643266d83addc5eab
---
 hw/arm/aspeed.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 4193a3d23d..80aa687372 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -431,12 +431,20 @@ static void aspeed_machine_init(MachineState *machine)
     arm_load_kernel(ARM_CPU(first_cpu), machine, &aspeed_board_binfo);
 }
 
-static void at24c_eeprom_init(I2CBus *bus, uint8_t addr, uint32_t rsize)
+static void at24c_eeprom_init(I2CBus *bus, uint8_t addr, uint32_t rsize,
+                              int index)
 {
     I2CSlave *i2c_dev = i2c_slave_new("at24c-eeprom", addr);
     DeviceState *dev = DEVICE(i2c_dev);
 
+    DriveInfo *dinfo = drive_get_by_index(IF_PFLASH, index);
+    BlockBackend *blk = dinfo ? blk_by_legacy_dinfo(dinfo) : NULL;
+
+    if (blk) {
+        qdev_prop_set_drive(DEVICE(dev), "drive", blk);
+    }
     qdev_prop_set_uint32(dev, "rom-size", rsize);
+
     i2c_slave_realize_and_unref(i2c_dev, bus, &error_abort);
 }
 
@@ -685,7 +693,7 @@ static void fp5280g2_bmc_i2c_init(AspeedMachineState *bmc)
     I2CSlave *i2c_mux;
 
     /* The at24c256 */
-    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 1), 0x50, 32768);
+    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 1), 0x50, 32768, 1);
 
     /* The fp5280g2 expects a TMP112 but a TMP105 is compatible */
     i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 2), TYPE_TMP105,
@@ -918,13 +926,13 @@ static void bletchley_bmc_i2c_init(AspeedMachineState 
*bmc)
     }
 
     /* Bus 6 */
-    at24c_eeprom_init(i2c[6], 0x56, 65536);
+    at24c_eeprom_init(i2c[6], 0x56, 65536, 1);
     /* Missing model: nxp,pcf85263 @ 0x51 , but ds1338 works enough */
     i2c_slave_create_simple(i2c[6], "ds1338", 0x51);
 
 
     /* Bus 7 */
-    at24c_eeprom_init(i2c[7], 0x54, 65536);
+    at24c_eeprom_init(i2c[7], 0x54, 65536, 2);
 
     /* Bus 9 */
     i2c_slave_create_simple(i2c[9], TYPE_TMP421, 0x4f);
-- 
2.34.1