[v2,0/2] i2c: stm32f7: add SMBus-Alert support

Message

Alain Volmat March 18, 2021, 1:44 p.m. UTC

This serie adds support for SMBus Alert on the STM32F7.
A new binding st,smbus-alert is added in order to differenciate
with the existing smbus binding.

SMBA alert control and status logic must be enabled along with
SMBALERT# pin configured via pinctrl in the device tree. This is the
rational for adding "st,smbus-alert" property.

---
v2:
When SMBUS alert isn't available on the board (SMBA unused), this
logic musn't be enabled. Enabling it unconditionally wrongly lead to get
SMBA interrupts.
So, add "st,smbus-alert" dedicated binding to have a smbus alert with a
consistent pin configuration in DT.

Alain Volmat (2):
  dt-bindings: i2c: stm32f7: add st,smbus-alert binding for SMBus Alert
  i2c: stm32f7: add SMBus-Alert support

 .../devicetree/bindings/i2c/st,stm32-i2c.yaml |  5 ++
 drivers/i2c/busses/i2c-stm32f7.c              | 73 +++++++++++++++++++
 2 files changed, 78 insertions(+)