Implementing read_byte_pec using read_byte_data is impossible.
SMBus read byte with PEC:
S Addr Rd [A] [Data] A [PEC] NA P
SMBus read byte data:
S Addr Wr [A] Comm [A] S Addr Rd [A] [Data] NA P
Index: i2c/kernel/i2c.h
===================================================================
RCS file: /home/cvs/i2c/kernel/i2c.h,v
retrieving revision 1.95
diff -u -r1.95 i2c.h
--- i2c/kernel/i2c.h 6 Sep 2005 20:08:39 -0000 1.95
+++ i2c/kernel/i2c.h 24 Sep 2005 02:36:03 -0000
@@ -397,6 +397,7 @@
#define I2C_FUNC_10BIT_ADDR 0x00000002
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_READ_BYTE_PEC 0x00000400 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
@@ -435,12 +436,12 @@
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
#define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
+#define I2C_FUNC_SMBUS_BYTE_PEC (I2C_FUNC_SMBUS_READ_BYTE_PEC | \
+ I2C_FUNC_SMBUS_WRITE_BYTE_PEC)
-#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
-#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
Index: lm_sensors2/kernel/include/i2c-dev.h
===================================================================
RCS file: /home/cvs/lm_sensors2/kernel/include/i2c-dev.h,v
retrieving revision 1.7
diff -u -r1.7 i2c-dev.h
--- lm_sensors2/kernel/include/i2c-dev.h 21 Jan 2003 20:01:26 -0000 1.7
+++ lm_sensors2/kernel/include/i2c-dev.h 24 Sep 2005 02:36:03 -0000
@@ -55,6 +55,7 @@
#define I2C_FUNC_10BIT_ADDR 0x00000002
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_READ_BYTE_PEC 0x00000400 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
@@ -93,12 +94,12 @@
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC
#define I2C_FUNC_SMBUS_WORD_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC
+#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_PEC | \
+ I2C_FUNC_SMBUS_WRITE_BYTE_PEC
-#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
-#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
----
Hideki IWAMOTO h-iwamoto at kit.hi-ho.ne.jp
