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i2c: rework kernel config I2C_ACPI

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Commit da3c6647(I2C/ACPI: Clean up I2C ACPI code and Add CONFIG_I2C_ACPI
config) adds a new kernel config I2C_ACPI and make I2C core built in
when the config is selected. This is wrong because distributions
etc generally compile I2C as a module and the commit broken that.
This patch is to rename I2C_ACPI to ACPI_I2C_OPREGION. New config
only controls ACPI I2C operation region code and depends on I2C=y.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[wsa: removed unrelated change for Kconfig]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Lan Tianyu 2014-08-15 13:38:59 +08:00 committed by Wolfram Sang
parent 7d1311b93e
commit 366047515c
4 changed files with 17 additions and 14 deletions
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15
drivers/i2c/Kconfig
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@ -23,17 +23,14 @@ config I2C
This I2C support can also be built as a module. If so, the module
will be called i2c-core.
config I2C_ACPI
bool "I2C ACPI support"
select I2C
depends on ACPI
config ACPI_I2C_OPREGION
bool "ACPI I2C Operation region support"
depends on I2C=y && ACPI
default y
help
Say Y here if you want to enable ACPI I2C support. This includes support
for automatic enumeration of I2C slave devices and support for ACPI I2C
Operation Regions. Operation Regions allow firmware (BIOS) code to
access I2C slave devices, such as smart batteries through an I2C host
controller driver.
Say Y here if you want to enable ACPI I2C operation region support.
Operation Regions allow firmware (BIOS) code to access I2C slave devices,
such as smart batteries through an I2C host controller driver.
if I2C

2
drivers/i2c/Makefile
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@ -3,7 +3,7 @@
#
i2ccore-y := i2c-core.o
i2ccore-$(CONFIG_I2C_ACPI) += i2c-acpi.o
i2ccore-$(CONFIG_ACPI) += i2c-acpi.o
obj-$(CONFIG_I2C_BOARDINFO) += i2c-boardinfo.o
obj-$(CONFIG_I2C) += i2ccore.o

2
drivers/i2c/i2c-acpi.c
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@ -126,6 +126,7 @@ void acpi_i2c_register_devices(struct i2c_adapter *adap)
dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
}
#ifdef CONFIG_ACPI_I2C_OPREGION
static int acpi_gsb_i2c_read_bytes(struct i2c_client *client,
u8 cmd, u8 *data, u8 data_len)
{
@ -360,3 +361,4 @@ void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter)
acpi_bus_detach_private_data(handle);
}
#endif

12
include/linux/i2c.h
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@ -577,16 +577,20 @@ static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node
}
#endif /* CONFIG_OF */
#ifdef CONFIG_I2C_ACPI
int acpi_i2c_install_space_handler(struct i2c_adapter *adapter);
void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter);
#ifdef CONFIG_ACPI
void acpi_i2c_register_devices(struct i2c_adapter *adap);
#else
static inline void acpi_i2c_register_devices(struct i2c_adapter *adap) { }
#endif /* CONFIG_ACPI */
#ifdef CONFIG_ACPI_I2C_OPREGION
int acpi_i2c_install_space_handler(struct i2c_adapter *adapter);
void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter);
#else
static inline void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter)
{ }
static inline int acpi_i2c_install_space_handler(struct i2c_adapter *adapter)
{ return 0; }
#endif
#endif /* CONFIG_ACPI_I2C_OPREGION */
#endif /* _LINUX_I2C_H */