smbus: add a smbus_eeprom_init_one() routine

This is an helper routine to add a single EEPROM on an I2C bus. It can
be directly used by smbus_eeprom_init() which adds a certain number of
EEPROMs on mips and x86 machines.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180530064049.27976-5-clg@kaod.org
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/i2c/smbus_eeprom.c

@@ -139,6 +139,16 @@ static void smbus_eeprom_register_types(void)
 
 type_init(smbus_eeprom_register_types)
 
+void smbus_eeprom_init_one(I2CBus *smbus, uint8_t address, uint8_t *eeprom_buf)
+{
+    DeviceState *dev;
+
+    dev = qdev_create((BusState *) smbus, "smbus-eeprom");
+    qdev_prop_set_uint8(dev, "address", address);
+    qdev_prop_set_ptr(dev, "data", eeprom_buf);
+    qdev_init_nofail(dev);
+}
+
 void smbus_eeprom_init(I2CBus *smbus, int nb_eeprom,
                        const uint8_t *eeprom_spd, int eeprom_spd_size)
 {
@@ -149,10 +159,6 @@ void smbus_eeprom_init(I2CBus *smbus, int nb_eeprom,
     }
 
     for (i = 0; i < nb_eeprom; i++) {
-        DeviceState *eeprom;
-        eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
-        qdev_prop_set_uint8(eeprom, "address", 0x50 + i);
-        qdev_prop_set_ptr(eeprom, "data", eeprom_buf + (i * 256));
-        qdev_init_nofail(eeprom);
+        smbus_eeprom_init_one(smbus, 0x50 + i, eeprom_buf + (i * 256));
     }
 }

include/hw/i2c/smbus.h

@@ -76,6 +76,7 @@ int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data);
 int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
                       int len);
 
+void smbus_eeprom_init_one(I2CBus *smbus, uint8_t address, uint8_t *eeprom_buf);
 void smbus_eeprom_init(I2CBus *smbus, int nb_eeprom,
                        const uint8_t *eeprom_spd, int size);