i2c: rework kernel config I2C_ACPI

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>

1 files changed, 6 insertions, 9 deletions

diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 3e3b680dc007..b51a402752c4 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -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