i2c: Constify i2c_client where possible
Helper functions for I2C and SMBus transactions don't modify the
i2c_client that is passed to them, so it can be marked const.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 6b4cc56..c7db698 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1362,7 +1362,7 @@
*
* Returns negative errno, or else the number of bytes written.
*/
-int i2c_master_send(struct i2c_client *client, const char *buf, int count)
+int i2c_master_send(const struct i2c_client *client, const char *buf, int count)
{
int ret;
struct i2c_adapter *adap = client->adapter;
@@ -1389,7 +1389,7 @@
*
* Returns negative errno, or else the number of bytes read.
*/
-int i2c_master_recv(struct i2c_client *client, char *buf, int count)
+int i2c_master_recv(const struct i2c_client *client, char *buf, int count)
{
struct i2c_adapter *adap = client->adapter;
struct i2c_msg msg;
@@ -1679,7 +1679,7 @@
* This executes the SMBus "receive byte" protocol, returning negative errno
* else the byte received from the device.
*/
-s32 i2c_smbus_read_byte(struct i2c_client *client)
+s32 i2c_smbus_read_byte(const struct i2c_client *client)
{
union i2c_smbus_data data;
int status;
@@ -1699,7 +1699,7 @@
* This executes the SMBus "send byte" protocol, returning negative errno
* else zero on success.
*/
-s32 i2c_smbus_write_byte(struct i2c_client *client, u8 value)
+s32 i2c_smbus_write_byte(const struct i2c_client *client, u8 value)
{
return i2c_smbus_xfer(client->adapter, client->addr, client->flags,
I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
@@ -1714,7 +1714,7 @@
* This executes the SMBus "read byte" protocol, returning negative errno
* else a data byte received from the device.
*/
-s32 i2c_smbus_read_byte_data(struct i2c_client *client, u8 command)
+s32 i2c_smbus_read_byte_data(const struct i2c_client *client, u8 command)
{
union i2c_smbus_data data;
int status;
@@ -1735,7 +1735,8 @@
* This executes the SMBus "write byte" protocol, returning negative errno
* else zero on success.
*/
-s32 i2c_smbus_write_byte_data(struct i2c_client *client, u8 command, u8 value)
+s32 i2c_smbus_write_byte_data(const struct i2c_client *client, u8 command,
+ u8 value)
{
union i2c_smbus_data data;
data.byte = value;
@@ -1753,7 +1754,7 @@
* This executes the SMBus "read word" protocol, returning negative errno
* else a 16-bit unsigned "word" received from the device.
*/
-s32 i2c_smbus_read_word_data(struct i2c_client *client, u8 command)
+s32 i2c_smbus_read_word_data(const struct i2c_client *client, u8 command)
{
union i2c_smbus_data data;
int status;
@@ -1774,7 +1775,8 @@
* This executes the SMBus "write word" protocol, returning negative errno
* else zero on success.
*/
-s32 i2c_smbus_write_word_data(struct i2c_client *client, u8 command, u16 value)
+s32 i2c_smbus_write_word_data(const struct i2c_client *client, u8 command,
+ u16 value)
{
union i2c_smbus_data data;
data.word = value;
@@ -1793,7 +1795,8 @@
* 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(struct i2c_client *client, u8 command, u16 value)
+s32 i2c_smbus_process_call(const struct i2c_client *client, u8 command,
+ u16 value)
{
union i2c_smbus_data data;
int status;
@@ -1821,7 +1824,7 @@
* support this; its emulation through I2C messaging relies on a specific
* mechanism (I2C_M_RECV_LEN) which may not be implemented.
*/
-s32 i2c_smbus_read_block_data(struct i2c_client *client, u8 command,
+s32 i2c_smbus_read_block_data(const struct i2c_client *client, u8 command,
u8 *values)
{
union i2c_smbus_data data;
@@ -1848,7 +1851,7 @@
* This executes the SMBus "block write" protocol, returning negative errno
* else zero on success.
*/
-s32 i2c_smbus_write_block_data(struct i2c_client *client, u8 command,
+s32 i2c_smbus_write_block_data(const struct i2c_client *client, u8 command,
u8 length, const u8 *values)
{
union i2c_smbus_data data;
@@ -1864,7 +1867,7 @@
EXPORT_SYMBOL(i2c_smbus_write_block_data);
/* Returns the number of read bytes */
-s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client, u8 command,
+s32 i2c_smbus_read_i2c_block_data(const struct i2c_client *client, u8 command,
u8 length, u8 *values)
{
union i2c_smbus_data data;
@@ -1884,7 +1887,7 @@
}
EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data);
-s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client, u8 command,
+s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client, u8 command,
u8 length, const u8 *values)
{
union i2c_smbus_data data;