linux-kernel - [PATCH v2 0/2] i2c: stm32f7: add SMBus-Alert support

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Message-ID: <1616075089-28115-1-git-send-email-alain.volmat@foss.st.com>
Date:   Thu, 18 Mar 2021 14:44:47 +0100
From:   Alain Volmat <alain.volmat@...s.st.com>
To:     <wsa@...nel.org>, <robh+dt@...nel.org>
CC:     <mark.rutland@....com>, <pierre-yves.mordret@...s.st.com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <fabrice.gasnier@...s.st.com>,
        <alain.volmat@...s.st.com>
Subject: [PATCH v2 0/2] i2c: stm32f7: add SMBus-Alert support

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(+)

-- 
2.17.1