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i2c: Rename the PEC functionality bit

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Rename I2C_FUNC_SMBUS_HWPEC_CALC as I2C_FUNC_SMBUS_PEC, and list that
functionality as always available through the software implementation.
Update documentation accordingly (and list similar requirements).

The way it's currently packaged doesn't present the capability in a
useful way.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
David Brownell 2007-10-13 23:56:33 +02:00 committed by Jean Delvare
parent 24d0fb423c
commit 6662cbb989
4 changed files with 13 additions and 7 deletions
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11
Documentation/i2c/dev-interface
View file

@ -90,12 +90,15 @@ ioctl(file,I2C_SLAVE,long addr)
ioctl(file,I2C_TENBIT,long select)
Selects ten bit addresses if select not equals 0, selects normal 7 bit
addresses if select equals 0. Default 0.
addresses if select equals 0. Default 0. This request is only valid
if the adapter has I2C_FUNC_10BIT_ADDR.
ioctl(file,I2C_PEC,long select)
Selects SMBus PEC (packet error checking) generation and verification
if select not equals 0, disables if select equals 0. Default 0.
Used only for SMBus transactions.
Used only for SMBus transactions. This request only has an effect if the
the adapter has I2C_FUNC_SMBUS_PEC; it is still safe if not, it just
doesn't have any effect.
ioctl(file,I2C_FUNCS,unsigned long *funcs)
Gets the adapter functionality and puts it in *funcs.
@ -103,8 +106,10 @@ ioctl(file,I2C_FUNCS,unsigned long *funcs)
ioctl(file,I2C_RDWR,struct i2c_rdwr_ioctl_data *msgset)
Do combined read/write transaction without stop in between.
The argument is a pointer to a struct i2c_rdwr_ioctl_data {
Only valid if the adapter has I2C_FUNC_I2C. The argument is
a pointer to a
struct i2c_rdwr_ioctl_data {
struct i2c_msg *msgs; /* ptr to array of simple messages */
int nmsgs; /* number of messages to exchange */
}

2
drivers/i2c/busses/i2c-amd8111.c
View file

@ -326,7 +326,7 @@ static u32 amd8111_func(struct i2c_adapter *adapter)
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA |
I2C_FUNC_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_HWPEC_CALC;
I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_PEC;
}
static const struct i2c_algorithm smbus_algorithm = {

2
drivers/i2c/busses/i2c-i801.c
View file

@ -516,7 +516,7 @@ static u32 i801_func(struct i2c_adapter *adapter)
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
| (isich4 ? I2C_FUNC_SMBUS_HWPEC_CALC : 0);
| (isich4 ? I2C_FUNC_SMBUS_PEC : 0);
}
static const struct i2c_algorithm smbus_algorithm = {

5
include/linux/i2c.h
View file

@ -491,7 +491,7 @@ struct i2c_msg {
#define I2C_FUNC_I2C 0x00000001
#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_PEC 0x00000008
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_QUICK 0x00010000
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
@ -527,7 +527,8 @@ struct i2c_msg {
I2C_FUNC_SMBUS_WORD_DATA | \
I2C_FUNC_SMBUS_PROC_CALL | \
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
I2C_FUNC_SMBUS_I2C_BLOCK)
I2C_FUNC_SMBUS_I2C_BLOCK | \
I2C_FUNC_SMBUS_PEC)
/*
* Data for SMBus Messages