unicore32 machine related files: add i2c bus drivers for pkunity-v3 soc

change from original version -- by advice of Jean Delvare
1. remove global variable i2c_reg, replaced by local variables
2. replace ENXIO with ENODEV when no platform resources
3. add adapter->nr assignment before i2c_add_numbered_adapter() call
4. add judgement for i2c_del_adapter() return value
5. release adapter when driver removed
6. add __devexit for puv3_i2c_remove() function
7. modify several names to more appropriated ones

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/unicore32/configs/debug_defconfig b/arch/unicore32/configs/debug_defconfig
index 3647f68147da..bf42abdd9683 100644
--- a/arch/unicore32/configs/debug_defconfig
+++ b/arch/unicore32/configs/debug_defconfig
@@ -114,6 +114,10 @@ CONFIG_INPUT_EVDEV=m
 #       Keyboards
 CONFIG_KEYBOARD_GPIO=m
 
+#       I2C support
+CONFIG_I2C=y
+CONFIG_I2C_PUV3=y
+
 #       Hardware Monitoring support
 #CONFIG_SENSORS_LM75=m
 #       Generic Thermal sysfs driver