i2c: smbus: add core function handling SMBus host-notify

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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>

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Alain Volmat 2020-08-03 07:17:55 +02:00 • committed by Wolfram Sang

parent e6277308ac

commit 2a71593da3

2 changed files with 119 additions and 0 deletions

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107

drivers/i2c/i2c-smbus.c

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12

include/linux/i2c-smbus.h

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