[v3,0/2] i2c: stm32f7: add SMBus-Alert support

Message ID 1616998145-28278-1-git-send-email-alain.volmat@foss.st.com
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  • i2c: stm32f7: add SMBus-Alert support
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Alain Volmat March 29, 2021, 6:09 a.m.
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.

---
v3:
use lore.kernel.org links instead of marc.info

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(+)

Comments

Alain Volmat April 30, 2021, 4:44 p.m. | #1
Hi Wolfram,

Gentle reminder about this serie about SMBus-Alert. Could you have
a look at it ?

Thanks
Alain

On Mon, Mar 29, 2021 at 08:09:03AM +0200, Alain Volmat wrote:
> 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.
> 
> ---
> v3:
> use lore.kernel.org links instead of marc.info
> 
> 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
>