hw/i2c: Rename i2c_try_create_slave() as i2c_slave_new()

We use "new" names for functions that allocate and initialize
device objects: pci_new(), isa_new(), usb_new().
Let's call this one i2c_slave_new(). Since we have to update
all the callers, also let it return a I2CSlave object.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200705224154.16917-3-f4bug@amsat.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

hw/arm/aspeed.c

@@ -513,7 +513,7 @@ static void witherspoon_bmc_i2c_init(AspeedMachineState *bmc)
     /* Bus 3: TODO bmp280@77 */
     /* Bus 3: TODO max31785@52 */
     /* Bus 3: TODO dps310@76 */
-    dev = i2c_try_create_slave(TYPE_PCA9552, 0x60);
+    dev = DEVICE(i2c_slave_new(TYPE_PCA9552, 0x60));
     qdev_prop_set_string(dev, "description", "pca1");
     i2c_realize_and_unref(dev, aspeed_i2c_get_bus(&soc->i2c, 3),
                           &error_fatal);
@@ -531,7 +531,7 @@ static void witherspoon_bmc_i2c_init(AspeedMachineState *bmc)
 
     smbus_eeprom_init_one(aspeed_i2c_get_bus(&soc->i2c, 11), 0x51,
                           eeprom_buf);
-    dev = i2c_try_create_slave(TYPE_PCA9552, 0x60);
+    dev = DEVICE(i2c_slave_new(TYPE_PCA9552, 0x60));
     qdev_prop_set_string(dev, "description", "pca0");
     i2c_realize_and_unref(dev, aspeed_i2c_get_bus(&soc->i2c, 11),
                           &error_fatal);

hw/i2c/core.c

@@ -267,13 +267,13 @@ const VMStateDescription vmstate_i2c_slave = {
     }
 };
 
-DeviceState *i2c_try_create_slave(const char *name, uint8_t addr)
+I2CSlave *i2c_slave_new(const char *name, uint8_t addr)
 {
     DeviceState *dev;
 
     dev = qdev_new(name);
     qdev_prop_set_uint8(dev, "address", addr);
-    return dev;
+    return I2C_SLAVE(dev);
 }
 
 bool i2c_realize_and_unref(DeviceState *dev, I2CBus *bus, Error **errp)
@@ -283,12 +283,11 @@ bool i2c_realize_and_unref(DeviceState *dev, I2CBus *bus, Error **errp)
 
 DeviceState *i2c_create_slave(I2CBus *bus, const char *name, uint8_t addr)
 {
-    DeviceState *dev;
+    I2CSlave *dev = i2c_slave_new(name, addr);
 
-    dev = i2c_try_create_slave(name, addr);
-    i2c_realize_and_unref(dev, bus, &error_fatal);
+    i2c_realize_and_unref(DEVICE(dev), bus, &error_fatal);
 
-    return dev;
+    return DEVICE(dev);
 }
 
 static void i2c_slave_class_init(ObjectClass *klass, void *data)

include/hw/i2c/i2c.h

@@ -79,8 +79,8 @@ int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send);
 int i2c_send(I2CBus *bus, uint8_t data);
 uint8_t i2c_recv(I2CBus *bus);
 
+I2CSlave *i2c_slave_new(const char *name, uint8_t addr);
 DeviceState *i2c_create_slave(I2CBus *bus, const char *name, uint8_t addr);
-DeviceState *i2c_try_create_slave(const char *name, uint8_t addr);
 bool i2c_realize_and_unref(DeviceState *dev, I2CBus *bus, Error **errp);
 
 /* lm832x.c */