hw/i2c/Kconfig: Add an entry for the SMBus

The System Management Bus is more or less a derivative of the I2C
bus, thus the Kconfig entry depends of I2C.
Not all boards providing an I2C bus support SMBus.
Use two different Kconfig entries to be able to select I2C without
selecting SMBus.

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Corey Minyard <[email protected]>

Author: philmd

hw/i2c/Kconfig

@@ -1,17 +1,21 @@
 config I2C
     bool
 
+config SMBUS
+    bool
+    select I2C
+
 config SMBUS_EEPROM
     bool
-    depends on I2C
+    select SMBUS
 
 config VERSATILE_I2C
     bool
     select BITBANG_I2C
 
 config ACPI_SMBUS
     bool
-    select I2C
+    select SMBUS
 
 config BITBANG_I2C
     bool

hw/i2c/Makefile.objs

@@ -1,4 +1,5 @@
-common-obj-$(CONFIG_I2C) += core.o smbus_slave.o smbus_master.o
+common-obj-$(CONFIG_I2C) += core.o
+common-obj-$(CONFIG_SMBUS) += smbus_slave.o smbus_master.o
 common-obj-$(CONFIG_SMBUS_EEPROM) += smbus_eeprom.o
 common-obj-$(CONFIG_VERSATILE_I2C) += versatile_i2c.o
 common-obj-$(CONFIG_ACPI_X86_ICH) += smbus_ich9.o