diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-30 15:54:59 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-30 15:54:59 -0700 |
commit | 839d8810747bbf39e0a5a7f223b67bffa7945f8d (patch) | |
tree | c16583342b871107f6805c21da4b1a96cfaa7aac /include | |
parent | 0cfdc724390fb9370f27bb9a133eadf69114dd21 (diff) | |
parent | 06a67848c6681a73e621e47c056490d51a07289f (diff) |
Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c: Functions for byte-swapped smbus_write/read_word_data
i2c-algo-pca: Return standard fault codes
i2c-algo-bit: Return standard fault codes
i2c-algo-bit: Be verbose on bus testing failure
i2c-algo-bit: Let user test buses without failing
i2c/scx200_acb: Fix section mismatch warning in scx200_pci_drv
i2c: I2C_ELEKTOR should depend on HAS_IOPORT
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/i2c.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index a6c652ef516..38a21c3edd2 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -34,6 +34,7 @@ #include <linux/sched.h> /* for completion */ #include <linux/mutex.h> #include <linux/of.h> /* for struct device_node */ +#include <linux/swab.h> /* for swab16 */ extern struct bus_type i2c_bus_type; extern struct device_type i2c_adapter_type; @@ -88,6 +89,22 @@ extern s32 i2c_smbus_read_word_data(const struct i2c_client *client, u8 command); extern s32 i2c_smbus_write_word_data(const struct i2c_client *client, u8 command, u16 value); + +static inline s32 +i2c_smbus_read_word_swapped(const struct i2c_client *client, u8 command) +{ + s32 value = i2c_smbus_read_word_data(client, command); + + return (value < 0) ? value : swab16(value); +} + +static inline s32 +i2c_smbus_write_word_swapped(const struct i2c_client *client, + u8 command, u16 value) +{ + return i2c_smbus_write_word_data(client, command, swab16(value)); +} + /* Returns the number of read bytes */ extern s32 i2c_smbus_read_block_data(const struct i2c_client *client, u8 command, u8 *values); |