[PATCH v2 3/4] dt-bindings: i2c-stm32: add SMBus Alert bindings
From: Alain Volmat <hidden>
Date: 2020-06-25 07:40:06
Also in:
linux-devicetree, linux-i2c, lkml
Subsystem:
i2c subsystem host drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Andi Shyti, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Add a new binding of the i2c-stm32f7 driver to enable the handling of the SMBUS-Alert. The I2C/SMBUS framework already provides a mechanism to enable SMBus-Alert by naming an IRQ line "smbus_alert". However, on stm32, the SMBus-Alert is part of the i2c IRQ. Using the smbus_alert naming here would lead to having 2 handlers (the handler of the driver and the smbus_alert handler from I2C/SMBUS framework) on the unique i2c IRQ of the stm32. Meaning that the smbus_alert handler would get called for all IRQ generated by the stm32 I2C controller. For that reason, the smbus_alert IRQ naming cannot be used and a dedicated binding is introduced. Signed-off-by: Alain Volmat <redacted> --- v2: Clarify commit message Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
index f2fcbb361180..6fde046fae5e 100644
--- a/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml@@ -36,6 +36,10 @@ allOf: minItems: 3 maxItems: 3 + st,smbus-alert: + description: Enable the SMBus Alert feature + $ref: /schemas/types.yaml#/definitions/flag + - if: properties: compatible:
--
2.7.4
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