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| author | Alain Volmat <alain.volmat@st.com> | 2020-08-03 08:17:55 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-09-09 11:38:28 +0300 |
| commit | 2a71593da34d473461f2f5c3dbb53b883596188a (patch) | |
| tree | 11499f7b30521f57203094e4694ccc33f27c26c2 /include/linux/i2c-smbus.h | |
| parent | e6277308ac214af04516564c516a0ff5f753d009 (diff) | |
| download | linux-2a71593da34d473461f2f5c3dbb53b883596188a.tar.xz | |
i2c: smbus: add core function handling SMBus host-notify
SMBus Host-Notify protocol, from the adapter point of view
consist of receiving a message from a client, including the
client address and some other data.
It can be simply handled by creating a new slave device
and registering a callback performing the parsing of the
message received from the client.
This commit introduces two new core functions
* i2c_new_slave_host_notify_device
* i2c_free_slave_host_notify_device
that take care of registration of the new slave device and
callback and will call i2c_handle_smbus_host_notify once a
Host-Notify event is received.
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'include/linux/i2c-smbus.h')
| -rw-r--r-- | include/linux/i2c-smbus.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/i2c-smbus.h b/include/linux/i2c-smbus.h index 1e4e0de4ef8b..1ef421818d3a 100644 --- a/include/linux/i2c-smbus.h +++ b/include/linux/i2c-smbus.h @@ -38,6 +38,18 @@ static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap) return 0; } #endif +#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_I2C_SLAVE) +struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter); +void i2c_free_slave_host_notify_device(struct i2c_client *client); +#else +static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter) +{ + return ERR_PTR(-ENOSYS); +} +static inline void i2c_free_slave_host_notify_device(struct i2c_client *client) +{ +} +#endif #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_DMI) void i2c_register_spd(struct i2c_adapter *adap); |