diff options
| author |   David S. Miller <davem@davemloft.net> | 2021-11-15 14:11:25 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-11-15 14:11:25 +0000 |
| commit | 71812af7234f30362b43ccff33f93890ae4c0655 (patch) | |
| tree | 92a7bce858d15b20b9c7b7fff83fca3fe3a225ef /include/linux | |
| parent | net: bridge: Slightly optimize 'find_portno()' (diff) | |
| parent | mctp i2c: MCTP I2C binding driver (diff) | |
Merge branch 'mctp-i2c-driver'
Matt Johnston says:
====================
MCTP I2C driver
This patch series adds a netdev driver providing MCTP transport over
I2C.
It applies against net-next using recent MCTP changes there, though also
has I2C core changes for review. I'll leave it to maintainers where it
should be applied - please let me know if it needs to be submitted
differently.
The I2C patches were previously sent as RFC though the only feedback
there was an ack to 255 bytes for aspeed.
The dt-bindings patch went through review on the list.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i2c.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 16119ac1aa97..353d6b4e7a53 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -52,6 +52,19 @@ typedef int (*i2c_slave_cb_t)(struct i2c_client *client, struct module; struct property_entry; +/* SMBus 3.0 extends the maximum block read/write size to 255 (from 32). + * The larger size is only supported by some drivers, indicated by + * the I2C_FUNC_SMBUS_V3_BLOCK functionality bit. + */ +#define I2C_SMBUS_V3_BLOCK_MAX 255 /* As specified in SMBus 3.0 standard */ + +/* Note compatibility definition in uapi header with 32 byte block */ +union i2c_smbus_data { + __u8 byte; + __u16 word; + __u8 block[I2C_SMBUS_V3_BLOCK_MAX + 1]; /* block[0] is used for length */ +}; + #if IS_ENABLED(CONFIG_I2C) /* Return the Frequency mode string based on the bus frequency */ const char *i2c_freq_mode_string(u32 bus_freq_hz); |