i2c: move acpi code back into the core
authorWolfram Sang <wsa@the-dreams.de>
Mon, 22 Sep 2014 17:41:00 +0000 (19:41 +0200)
committerWolfram Sang <wsa@the-dreams.de>
Thu, 25 Sep 2014 14:07:15 +0000 (16:07 +0200)
Commit 5d98e61d337c ("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: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Lan Tianyu <tianyu.lan@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
MAINTAINERS
drivers/i2c/Makefile
drivers/i2c/i2c-acpi.c [deleted file]
drivers/i2c/i2c-core.c
include/linux/i2c.h

index 809ecd680d8829f6148ababe654d30a7882b11fe..e3682d0dea1e6d454889dc4b9a19da41e2cd9353 100644 (file)
@@ -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>
index e0228b228256a8771df7b0be2536c3c42f90448d..1722f50f247385e0247c98e5dee91c97f18203ee 100644 (file)
@@ -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
diff --git a/drivers/i2c/i2c-acpi.c b/drivers/i2c/i2c-acpi.c
deleted file mode 100644 (file)
index 0dbc18c..0000000
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
- * 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
index 632057a4461589c3f7135f4d5feac4a0106041b0..b696ac7e6d867645dc15b18a4793c9b05905289a 100644 (file)
@@ -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,
index a95efeb53a8b76da08450f47f614f9713dc89a9f..b556e0ab946fbffd18d246435dc65663e188db54 100644 (file)
@@ -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 */