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Date: Fri, 15 Aug 2014 13:38:59 +0800
From: Lan Tianyu <tianyu.lan@...el.com>
To: wsa@...-dreams.de, mika.westerberg@...ux.intel.com,
torvalds@...ux-foundation.org
Cc: Lan Tianyu <tianyu.lan@...el.com>, linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH V2] 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@...el.com>
---
drivers/i2c/Kconfig | 20 +++++++-------------
drivers/i2c/Makefile | 2 +-
drivers/i2c/i2c-acpi.c | 2 ++
include/linux/i2c.h | 12 ++++++++----
4 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 3e3b680..f0937e5 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -2,9 +2,7 @@
# I2C subsystem configuration
#
-menu "I2C support"
-
-config I2C
+menuconfig I2C
tristate "I2C support"
select RT_MUTEXES
---help---
@@ -23,17 +21,14 @@ 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
@@ -139,4 +134,3 @@ config I2C_DEBUG_BUS
endif # I2C
-endmenu
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index a1f590c..e0228b2 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -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
diff --git a/drivers/i2c/i2c-acpi.c b/drivers/i2c/i2c-acpi.c
index e8b6196..0dbc18c 100644
--- a/drivers/i2c/i2c-acpi.c
+++ b/drivers/i2c/i2c-acpi.c
@@ -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
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index ea50766..a95efeb 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -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 */
--
1.8.4.rc0.1.g8f6a3e5.dirty
--
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