i2c: core: Remove definition of i2c_smbus_process_call

i2c_smbus_process_call has no users in the kernel, so this can be
removed. Documentation for the same has been updated accordingly.

Fixes following sparse warning.
drivers/i2c/i2c-core.c:1871:5: warning: symbol 'i2c_smbus_process_call'
was not declared. Should it be static?

[wsa: updated the documentation]

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>

3 files changed, 4 insertions, 27 deletions

diff --git a/Documentation/i2c/smbus-protocol b/Documentation/i2c/smbus-protocol
index d1f22618e14b..6012b12b3510 100644
--- a/Documentation/i2c/smbus-protocol
+++ b/Documentation/i2c/smbus-protocol
@@ -137,8 +137,8 @@ available for writes where the two data bytes are the other way
 around (not SMBus compliant, but very popular.)
 
 
-SMBus Process Call:  i2c_smbus_process_call()
-=============================================
+SMBus Process Call:
+===================
 
 This command selects a device register (through the Comm byte), sends
 16 bits of data to it, and reads 16 bits of data in return.
diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index 3a94b0e6f601..6b344b516bff 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -365,8 +365,6 @@ in terms of it. Never use this function directly!
         s32 i2c_smbus_read_word_data(struct i2c_client *client, u8 command);
         s32 i2c_smbus_write_word_data(struct i2c_client *client,
                                       u8 command, u16 value);
-        s32 i2c_smbus_process_call(struct i2c_client *client,
-                                   u8 command, u16 value);
         s32 i2c_smbus_read_block_data(struct i2c_client *client,
                                       u8 command, u8 *values);
         s32 i2c_smbus_write_block_data(struct i2c_client *client,
@@ -381,6 +379,8 @@ These ones were removed from i2c-core because they had no users, but could
 be added back later if needed:
 
         s32 i2c_smbus_write_quick(struct i2c_client *client, u8 value);
+        s32 i2c_smbus_process_call(struct i2c_client *client,
+                                   u8 command, u16 value);
         s32 i2c_smbus_block_process_call(struct i2c_client *client,
                                          u8 command, u8 length, u8 *values);
 
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index e388590b44ab..66a30f7ac882 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1866,29 +1866,6 @@ s32 i2c_smbus_write_word_data(const struct i2c_client *client, u8 command,
 EXPORT_SYMBOL(i2c_smbus_write_word_data);
 
 /**
- * i2c_smbus_process_call - SMBus "process call" protocol
- * @client: Handle to slave device
- * @command: Byte interpreted by slave
- * @value: 16-bit "word" being written
- *
- * This executes the SMBus "process call" protocol, returning negative errno
- * else a 16-bit unsigned "word" received from the device.
- */
-s32 i2c_smbus_process_call(const struct i2c_client *client, u8 command,
-                           u16 value)
-{
-        union i2c_smbus_data data;
-        int status;
-        data.word = value;
-
-        status = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
-                                I2C_SMBUS_WRITE, command,
-                                I2C_SMBUS_PROC_CALL, &data);
-        return (status < 0) ? status : data.word;
-}
-EXPORT_SYMBOL(i2c_smbus_process_call);
-
-/**
  * i2c_smbus_read_block_data - SMBus "block read" protocol
  * @client: Handle to slave device
  * @command: Byte interpreted by slave