Commit 17f4a5c4 authored by Wolfram Sang's avatar Wolfram Sang
Browse files

i2c: move acpi code back into the core 



Commit 5d98e61d ("I2C/ACPI: Add i2c ACPI operation region support")
renamed the i2c-core module. This may cause regressions for
distributions, so put the ACPI code back into the core.

Reported-by: default avatarJean Delvare <jdelvare@suse.de>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Tested-by: default avatarLan Tianyu <tianyu.lan@intel.com>
Tested-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
parent b4a7bd7a

MAINTAINERS

+0 −1
Original line number Diff line number Diff line
@@ -4477,7 +4477,6 @@ M: Mika Westerberg <mika.westerberg@linux.intel.com> 
L:	linux-i2c@vger.kernel.org

L:	linux-acpi@vger.kernel.org

S:	Maintained

F:	drivers/i2c/i2c-acpi.c



I2C-TAOS-EVM DRIVER

M:	Jean Delvare <jdelvare@suse.de>

drivers/i2c/Makefile

+1 −4
Original line number Diff line number Diff line
@@ -2,11 +2,8 @@ 
# Makefile for the i2c core.

#



i2ccore-y := i2c-core.o

i2ccore-$(CONFIG_ACPI)	 	+= i2c-acpi.o



obj-$(CONFIG_I2C_BOARDINFO)	+= i2c-boardinfo.o

obj-$(CONFIG_I2C)		+= i2ccore.o

obj-$(CONFIG_I2C)		+= i2c-core.o

obj-$(CONFIG_I2C_SMBUS)		+= i2c-smbus.o

obj-$(CONFIG_I2C_CHARDEV)	+= i2c-dev.o

obj-$(CONFIG_I2C_MUX)		+= i2c-mux.o

drivers/i2c/i2c-acpi.c

deleted100644 → 0
+0 −364
Original line number Diff line number Diff line 
/*

 * I2C ACPI code

 *

 * Copyright (C) 2014 Intel Corp

 *

 * Author: Lan Tianyu <tianyu.lan@intel.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * for more details.

 */

#define pr_fmt(fmt) "I2C/ACPI : " fmt



#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/acpi.h>



struct acpi_i2c_handler_data {

	struct acpi_connection_info info;

	struct i2c_adapter *adapter;

};



struct gsb_buffer {

	u8	status;

	u8	len;

	union {

		u16	wdata;

		u8	bdata;

		u8	data[0];

	};

} __packed;



static int acpi_i2c_add_resource(struct acpi_resource *ares, void *data)

{

	struct i2c_board_info *info = data;



	if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {

		struct acpi_resource_i2c_serialbus *sb;



		sb = &ares->data.i2c_serial_bus;

		if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) {

			info->addr = sb->slave_address;

			if (sb->access_mode == ACPI_I2C_10BIT_MODE)

				info->flags |= I2C_CLIENT_TEN;

		}

	} else if (info->irq < 0) {

		struct resource r;



		if (acpi_dev_resource_interrupt(ares, 0, &r))

			info->irq = r.start;

	}



	/* Tell the ACPI core to skip this resource */

	return 1;

}



static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,

				       void *data, void **return_value)

{

	struct i2c_adapter *adapter = data;

	struct list_head resource_list;

	struct i2c_board_info info;

	struct acpi_device *adev;

	int ret;



	if (acpi_bus_get_device(handle, &adev))

		return AE_OK;

	if (acpi_bus_get_status(adev) || !adev->status.present)

		return AE_OK;



	memset(&info, 0, sizeof(info));

	info.acpi_node.companion = adev;

	info.irq = -1;



	INIT_LIST_HEAD(&resource_list);

	ret = acpi_dev_get_resources(adev, &resource_list,

				     acpi_i2c_add_resource, &info);

	acpi_dev_free_resource_list(&resource_list);



	if (ret < 0 || !info.addr)

		return AE_OK;



	adev->power.flags.ignore_parent = true;

	strlcpy(info.type, dev_name(&adev->dev), sizeof(info.type));

	if (!i2c_new_device(adapter, &info)) {

		adev->power.flags.ignore_parent = false;

		dev_err(&adapter->dev,

			"failed to add I2C device %s from ACPI\n",

			dev_name(&adev->dev));

	}



	return AE_OK;

}



/**

 * acpi_i2c_register_devices - enumerate I2C slave devices behind adapter

 * @adap: pointer to adapter

 *

 * Enumerate all I2C slave devices behind this adapter by walking the ACPI

 * namespace. When a device is found it will be added to the Linux device

 * model and bound to the corresponding ACPI handle.

 */

void acpi_i2c_register_devices(struct i2c_adapter *adap)

{

	acpi_handle handle;

	acpi_status status;



	if (!adap->dev.parent)

		return;



	handle = ACPI_HANDLE(adap->dev.parent);

	if (!handle)

		return;



	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,

				     acpi_i2c_add_device, NULL,

				     adap, NULL);

	if (ACPI_FAILURE(status))

		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)

{



	struct i2c_msg msgs[2];

	int ret;

	u8 *buffer;



	buffer = kzalloc(data_len, GFP_KERNEL);

	if (!buffer)

		return AE_NO_MEMORY;



	msgs[0].addr = client->addr;

	msgs[0].flags = client->flags;

	msgs[0].len = 1;

	msgs[0].buf = &cmd;



	msgs[1].addr = client->addr;

	msgs[1].flags = client->flags | I2C_M_RD;

	msgs[1].len = data_len;

	msgs[1].buf = buffer;



	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

	if (ret < 0)

		dev_err(&client->adapter->dev, "i2c read failed\n");

	else

		memcpy(data, buffer, data_len);



	kfree(buffer);

	return ret;

}



static int acpi_gsb_i2c_write_bytes(struct i2c_client *client,

		u8 cmd, u8 *data, u8 data_len)

{



	struct i2c_msg msgs[1];

	u8 *buffer;

	int ret = AE_OK;



	buffer = kzalloc(data_len + 1, GFP_KERNEL);

	if (!buffer)

		return AE_NO_MEMORY;



	buffer[0] = cmd;

	memcpy(buffer + 1, data, data_len);



	msgs[0].addr = client->addr;

	msgs[0].flags = client->flags;

	msgs[0].len = data_len + 1;

	msgs[0].buf = buffer;



	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

	if (ret < 0)

		dev_err(&client->adapter->dev, "i2c write failed\n");



	kfree(buffer);

	return ret;

}



static acpi_status

acpi_i2c_space_handler(u32 function, acpi_physical_address command,

			u32 bits, u64 *value64,

			void *handler_context, void *region_context)

{

	struct gsb_buffer *gsb = (struct gsb_buffer *)value64;

	struct acpi_i2c_handler_data *data = handler_context;

	struct acpi_connection_info *info = &data->info;

	struct acpi_resource_i2c_serialbus *sb;

	struct i2c_adapter *adapter = data->adapter;

	struct i2c_client client;

	struct acpi_resource *ares;

	u32 accessor_type = function >> 16;

	u8 action = function & ACPI_IO_MASK;

	acpi_status ret = AE_OK;

	int status;



	ret = acpi_buffer_to_resource(info->connection, info->length, &ares);

	if (ACPI_FAILURE(ret))

		return ret;



	if (!value64 || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) {

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	sb = &ares->data.i2c_serial_bus;

	if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C) {

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	memset(&client, 0, sizeof(client));

	client.adapter = adapter;

	client.addr = sb->slave_address;

	client.flags = 0;



	if (sb->access_mode == ACPI_I2C_10BIT_MODE)

		client.flags |= I2C_CLIENT_TEN;



	switch (accessor_type) {

	case ACPI_GSB_ACCESS_ATTRIB_SEND_RCV:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_byte(&client);

			if (status >= 0) {

				gsb->bdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_byte(&client, gsb->bdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_BYTE:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_byte_data(&client, command);

			if (status >= 0) {

				gsb->bdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_byte_data(&client, command,

					gsb->bdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_WORD:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_word_data(&client, command);

			if (status >= 0) {

				gsb->wdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_word_data(&client, command,

					gsb->wdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_BLOCK:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_block_data(&client, command,

					gsb->data);

			if (status >= 0) {

				gsb->len = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_block_data(&client, command,

					gsb->len, gsb->data);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_MULTIBYTE:

		if (action == ACPI_READ) {

			status = acpi_gsb_i2c_read_bytes(&client, command,

					gsb->data, info->access_length);

			if (status > 0)

				status = 0;

		} else {

			status = acpi_gsb_i2c_write_bytes(&client, command,

					gsb->data, info->access_length);

		}

		break;



	default:

		pr_info("protocol(0x%02x) is not supported.\n", accessor_type);

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	gsb->status = status;



 err:

	ACPI_FREE(ares);

	return ret;

}





int acpi_i2c_install_space_handler(struct i2c_adapter *adapter)

{

	acpi_handle handle = ACPI_HANDLE(adapter->dev.parent);

	struct acpi_i2c_handler_data *data;

	acpi_status status;



	if (!handle)

		return -ENODEV;



	data = kzalloc(sizeof(struct acpi_i2c_handler_data),

			    GFP_KERNEL);

	if (!data)

		return -ENOMEM;



	data->adapter = adapter;

	status = acpi_bus_attach_private_data(handle, (void *)data);

	if (ACPI_FAILURE(status)) {

		kfree(data);

		return -ENOMEM;

	}



	status = acpi_install_address_space_handler(handle,

				ACPI_ADR_SPACE_GSBUS,

				&acpi_i2c_space_handler,

				NULL,

				data);

	if (ACPI_FAILURE(status)) {

		dev_err(&adapter->dev, "Error installing i2c space handler\n");

		acpi_bus_detach_private_data(handle);

		kfree(data);

		return -ENOMEM;

	}



	return 0;

}



void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter)

{

	acpi_handle handle = ACPI_HANDLE(adapter->dev.parent);

	struct acpi_i2c_handler_data *data;

	acpi_status status;



	if (!handle)

		return;



	acpi_remove_address_space_handler(handle,

				ACPI_ADR_SPACE_GSBUS,

				&acpi_i2c_space_handler);



	status = acpi_bus_get_private_data(handle, (void **)&data);

	if (ACPI_SUCCESS(status))

		kfree(data);



	acpi_bus_detach_private_data(handle);

}

#endif

drivers/i2c/i2c-core.c

+354 −0
Original line number Diff line number Diff line
@@ -27,6 +27,8 @@ 
   OF support is copyright (c) 2008 Jochen Friedrich <jochen@scram.de>

   (based on a previous patch from Jon Smirl <jonsmirl@gmail.com>) and

   (c) 2013  Wolfram Sang <wsa@the-dreams.de>

   I2C ACPI code Copyright (C) 2014 Intel Corp

   Author: Lan Tianyu <tianyu.lan@intel.com>

 */



#include <linux/module.h>
@@ -78,6 +80,358 @@ void i2c_transfer_trace_unreg(void) 
	static_key_slow_dec(&i2c_trace_msg);

}



#if defined(CONFIG_ACPI)

struct acpi_i2c_handler_data {

	struct acpi_connection_info info;

	struct i2c_adapter *adapter;

};



struct gsb_buffer {

	u8	status;

	u8	len;

	union {

		u16	wdata;

		u8	bdata;

		u8	data[0];

	};

} __packed;



static int acpi_i2c_add_resource(struct acpi_resource *ares, void *data)

{

	struct i2c_board_info *info = data;



	if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {

		struct acpi_resource_i2c_serialbus *sb;



		sb = &ares->data.i2c_serial_bus;

		if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) {

			info->addr = sb->slave_address;

			if (sb->access_mode == ACPI_I2C_10BIT_MODE)

				info->flags |= I2C_CLIENT_TEN;

		}

	} else if (info->irq < 0) {

		struct resource r;



		if (acpi_dev_resource_interrupt(ares, 0, &r))

			info->irq = r.start;

	}



	/* Tell the ACPI core to skip this resource */

	return 1;

}



static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,

				       void *data, void **return_value)

{

	struct i2c_adapter *adapter = data;

	struct list_head resource_list;

	struct i2c_board_info info;

	struct acpi_device *adev;

	int ret;



	if (acpi_bus_get_device(handle, &adev))

		return AE_OK;

	if (acpi_bus_get_status(adev) || !adev->status.present)

		return AE_OK;



	memset(&info, 0, sizeof(info));

	info.acpi_node.companion = adev;

	info.irq = -1;



	INIT_LIST_HEAD(&resource_list);

	ret = acpi_dev_get_resources(adev, &resource_list,

				     acpi_i2c_add_resource, &info);

	acpi_dev_free_resource_list(&resource_list);



	if (ret < 0 || !info.addr)

		return AE_OK;



	adev->power.flags.ignore_parent = true;

	strlcpy(info.type, dev_name(&adev->dev), sizeof(info.type));

	if (!i2c_new_device(adapter, &info)) {

		adev->power.flags.ignore_parent = false;

		dev_err(&adapter->dev,

			"failed to add I2C device %s from ACPI\n",

			dev_name(&adev->dev));

	}



	return AE_OK;

}



/**

 * acpi_i2c_register_devices - enumerate I2C slave devices behind adapter

 * @adap: pointer to adapter

 *

 * Enumerate all I2C slave devices behind this adapter by walking the ACPI

 * namespace. When a device is found it will be added to the Linux device

 * model and bound to the corresponding ACPI handle.

 */

static void acpi_i2c_register_devices(struct i2c_adapter *adap)

{

	acpi_handle handle;

	acpi_status status;



	if (!adap->dev.parent)

		return;



	handle = ACPI_HANDLE(adap->dev.parent);

	if (!handle)

		return;



	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,

				     acpi_i2c_add_device, NULL,

				     adap, NULL);

	if (ACPI_FAILURE(status))

		dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");

}



#else /* CONFIG_ACPI */

static inline void acpi_i2c_register_devices(struct i2c_adapter *adap) { }

#endif /* CONFIG_ACPI */



#ifdef CONFIG_ACPI_I2C_OPREGION

static int acpi_gsb_i2c_read_bytes(struct i2c_client *client,

		u8 cmd, u8 *data, u8 data_len)

{



	struct i2c_msg msgs[2];

	int ret;

	u8 *buffer;



	buffer = kzalloc(data_len, GFP_KERNEL);

	if (!buffer)

		return AE_NO_MEMORY;



	msgs[0].addr = client->addr;

	msgs[0].flags = client->flags;

	msgs[0].len = 1;

	msgs[0].buf = &cmd;



	msgs[1].addr = client->addr;

	msgs[1].flags = client->flags | I2C_M_RD;

	msgs[1].len = data_len;

	msgs[1].buf = buffer;



	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

	if (ret < 0)

		dev_err(&client->adapter->dev, "i2c read failed\n");

	else

		memcpy(data, buffer, data_len);



	kfree(buffer);

	return ret;

}



static int acpi_gsb_i2c_write_bytes(struct i2c_client *client,

		u8 cmd, u8 *data, u8 data_len)

{



	struct i2c_msg msgs[1];

	u8 *buffer;

	int ret = AE_OK;



	buffer = kzalloc(data_len + 1, GFP_KERNEL);

	if (!buffer)

		return AE_NO_MEMORY;



	buffer[0] = cmd;

	memcpy(buffer + 1, data, data_len);



	msgs[0].addr = client->addr;

	msgs[0].flags = client->flags;

	msgs[0].len = data_len + 1;

	msgs[0].buf = buffer;



	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

	if (ret < 0)

		dev_err(&client->adapter->dev, "i2c write failed\n");



	kfree(buffer);

	return ret;

}



static acpi_status

acpi_i2c_space_handler(u32 function, acpi_physical_address command,

			u32 bits, u64 *value64,

			void *handler_context, void *region_context)

{

	struct gsb_buffer *gsb = (struct gsb_buffer *)value64;

	struct acpi_i2c_handler_data *data = handler_context;

	struct acpi_connection_info *info = &data->info;

	struct acpi_resource_i2c_serialbus *sb;

	struct i2c_adapter *adapter = data->adapter;

	struct i2c_client client;

	struct acpi_resource *ares;

	u32 accessor_type = function >> 16;

	u8 action = function & ACPI_IO_MASK;

	acpi_status ret = AE_OK;

	int status;



	ret = acpi_buffer_to_resource(info->connection, info->length, &ares);

	if (ACPI_FAILURE(ret))

		return ret;



	if (!value64 || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) {

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	sb = &ares->data.i2c_serial_bus;

	if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C) {

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	memset(&client, 0, sizeof(client));

	client.adapter = adapter;

	client.addr = sb->slave_address;

	client.flags = 0;



	if (sb->access_mode == ACPI_I2C_10BIT_MODE)

		client.flags |= I2C_CLIENT_TEN;



	switch (accessor_type) {

	case ACPI_GSB_ACCESS_ATTRIB_SEND_RCV:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_byte(&client);

			if (status >= 0) {

				gsb->bdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_byte(&client, gsb->bdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_BYTE:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_byte_data(&client, command);

			if (status >= 0) {

				gsb->bdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_byte_data(&client, command,

					gsb->bdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_WORD:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_word_data(&client, command);

			if (status >= 0) {

				gsb->wdata = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_word_data(&client, command,

					gsb->wdata);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_BLOCK:

		if (action == ACPI_READ) {

			status = i2c_smbus_read_block_data(&client, command,

					gsb->data);

			if (status >= 0) {

				gsb->len = status;

				status = 0;

			}

		} else {

			status = i2c_smbus_write_block_data(&client, command,

					gsb->len, gsb->data);

		}

		break;



	case ACPI_GSB_ACCESS_ATTRIB_MULTIBYTE:

		if (action == ACPI_READ) {

			status = acpi_gsb_i2c_read_bytes(&client, command,

					gsb->data, info->access_length);

			if (status > 0)

				status = 0;

		} else {

			status = acpi_gsb_i2c_write_bytes(&client, command,

					gsb->data, info->access_length);

		}

		break;



	default:

		pr_info("protocol(0x%02x) is not supported.\n", accessor_type);

		ret = AE_BAD_PARAMETER;

		goto err;

	}



	gsb->status = status;



 err:

	ACPI_FREE(ares);

	return ret;

}





static int acpi_i2c_install_space_handler(struct i2c_adapter *adapter)

{

	acpi_handle handle = ACPI_HANDLE(adapter->dev.parent);

	struct acpi_i2c_handler_data *data;

	acpi_status status;



	if (!handle)

		return -ENODEV;



	data = kzalloc(sizeof(struct acpi_i2c_handler_data),

			    GFP_KERNEL);

	if (!data)

		return -ENOMEM;



	data->adapter = adapter;

	status = acpi_bus_attach_private_data(handle, (void *)data);

	if (ACPI_FAILURE(status)) {

		kfree(data);

		return -ENOMEM;

	}



	status = acpi_install_address_space_handler(handle,

				ACPI_ADR_SPACE_GSBUS,

				&acpi_i2c_space_handler,

				NULL,

				data);

	if (ACPI_FAILURE(status)) {

		dev_err(&adapter->dev, "Error installing i2c space handler\n");

		acpi_bus_detach_private_data(handle);

		kfree(data);

		return -ENOMEM;

	}



	return 0;

}



static void acpi_i2c_remove_space_handler(struct i2c_adapter *adapter)

{

	acpi_handle handle = ACPI_HANDLE(adapter->dev.parent);

	struct acpi_i2c_handler_data *data;

	acpi_status status;



	if (!handle)

		return;



	acpi_remove_address_space_handler(handle,

				ACPI_ADR_SPACE_GSBUS,

				&acpi_i2c_space_handler);



	status = acpi_bus_get_private_data(handle, (void **)&data);

	if (ACPI_SUCCESS(status))

		kfree(data);



	acpi_bus_detach_private_data(handle);

}

#else /* CONFIG_ACPI_I2C_OPREGION */

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 /* CONFIG_ACPI_I2C_OPREGION */



/* ------------------------------------------------------------------------- */



static const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,

include/linux/i2c.h

+0 −16
Original line number Diff line number Diff line
@@ -577,20 +577,4 @@ static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node 
}

#endif /* CONFIG_OF */



#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 /* CONFIG_ACPI_I2C_OPREGION */



#endif /* _LINUX_I2C_H */

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