diff options
| author | Peng Fan <peng.fan@nxp.com> | 2018-09-26 11:19:24 +0800 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2019-11-28 16:27:52 +0800 |
| commit | dda4dde724422c2e8082ffd83d3ea3b3ffb82d06 (patch) | |
| tree | 9c468359243492da53f367772e799376e0526902 /include/xen | |
| parent | 1990cee78d609db6696182755e58b934754ae7c5 (diff) | |
LF-191-2 i2c: introduce xen i2c paravirtualization driver
Add i2c backend frontend support.
The transaction only support one msg each time.
The frontend sends a request to backend, backend use i2c_transfer
to do real transaction to hardware and return the results to frontend.
Now i2cdump/get/set works.
In domu cfg file, use
"vi2c = ['backend=0,be-adapter=5a800000.i2c,addr=0x51;0x44']" to
create a dummy controller in frontend and allowed slaves in backend.
Currently the slave address check not added, it will be supported in
furture patch.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Leonard Crestez <leonard.crestez@nxp.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/io/i2cif.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/xen/interface/io/i2cif.h b/include/xen/interface/io/i2cif.h index b9542722f77d..c504670429d0 100644 --- a/include/xen/interface/io/i2cif.h +++ b/include/xen/interface/io/i2cif.h @@ -32,7 +32,7 @@ #include <xen/interface/io/ring.h> #include <xen/interface/grant_table.h> -#define I2CIF_BUF_LEN 32 +#define I2CIF_BUF_LEN I2C_SMBUS_BLOCK_MAX + 2 #define I2CIF_MAX_MSG 2 #define I2CIF_M_RD 0x0001 /* read data, from slave to master */ @@ -76,6 +76,13 @@ struct i2cif_request { } msg[I2CIF_MAX_MSG]; int num_msg; __u8 write_buf[I2CIF_BUF_LEN]; + + bool is_smbus; + __u16 addr; + __u16 flags; + __u8 read_write; + __u8 command; + int protocol; }; struct i2cif_response { |