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OpenCloudOS-Kernel
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i2c: Make I2C available on UML 

Remove the global dependency of the I2C subsystem on HAS_IOMEM and
move the dependency to the i2c/busses submenu, with an exception for
i2c-stub.

The generic I2C part does not need to have HAS_IOMEM set and thus now
becomes available in UML, so the I2C subsystem can now be used, e.g.
by the i2c-stub driver, for development of I2C device drivers.

[JD: Some adjustments.]

[Heiko Carstens: Keep I2C disabled on S390.]

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Peter Huewe 2012-10-05 22:23:52 +02:00 committed by Jean Delvare
parent 230da09435
commit 3ddb59d4bc
2 changed files with 17 additions and 14 deletions
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17
drivers/i2c/Kconfig
View File

@ -4,7 +4,7 @@
menuconfig I2C
tristate "I2C support"
depends on HAS_IOMEM
depends on !S390
select RT_MUTEXES
---help---
I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
@ -49,6 +49,7 @@ config I2C_CHARDEV
config I2C_MUX
tristate "I2C bus multiplexing support"
depends on HAS_IOMEM
help
Say Y here if you want the I2C core to support the ability to
handle multiplexed I2C bus topologies, by presenting each
@ -86,6 +87,19 @@ config I2C_SMBUS
source drivers/i2c/algos/Kconfig
source drivers/i2c/busses/Kconfig
config I2C_STUB
tristate "I2C/SMBus Test Stub"
depends on EXPERIMENTAL && m
default 'n'
help
This module may be useful to developers of SMBus client drivers,
especially for certain kinds of sensor chips.
If you do build this module, be sure to read the notes and warnings
in <file:Documentation/i2c/i2c-stub>.
If you don't know what to do here, definitely say N.
config I2C_DEBUG_CORE
bool "I2C Core debugging messages"
help
@ -103,6 +117,7 @@ config I2C_DEBUG_ALGO
config I2C_DEBUG_BUS
bool "I2C Bus debugging messages"
depends on HAS_IOMEM
help
Say Y here if you want the I2C bus drivers to produce a bunch of
debug messages to the system log. Select this if you are having

14
drivers/i2c/busses/Kconfig
View File

@ -3,6 +3,7 @@
#
menu "I2C Hardware Bus support"
depends on HAS_IOMEM
comment "PC SMBus host controller drivers"
depends on PCI
@ -849,19 +850,6 @@ config I2C_SIBYTE
help
Supports the SiByte SOC on-chip I2C interfaces (2 channels).
config I2C_STUB
tristate "I2C/SMBus Test Stub"
depends on EXPERIMENTAL && m
default 'n'
help
This module may be useful to developers of SMBus client drivers,
especially for certain kinds of sensor chips.
If you do build this module, be sure to read the notes and warnings
in <file:Documentation/i2c/i2c-stub>.
If you don't know what to do here, definitely say N.
config SCx200_I2C
tristate "NatSemi SCx200 I2C using GPIO pins (DEPRECATED)"
depends on SCx200_GPIO