From: Alain Volmat <alain.volmat@st.com>
To: <wsa@kernel.org>, <robh+dt@kernel.org>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
alexandre.torgue@st.com, linux-kernel@vger.kernel.org,
pierre-yves.mordret@st.com, alain.volmat@st.com,
linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com,
fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 3/4] dt-bindings: i2c-stm32: add SMBus Alert bindings
Date: Thu, 25 Jun 2020 09:39:28 +0200 [thread overview]
Message-ID: <1593070769-9106-4-git-send-email-alain.volmat@st.com> (raw)
In-Reply-To: <1593070769-9106-1-git-send-email-alain.volmat@st.com>
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 <alain.volmat@st.com>
---
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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next prev parent reply other threads:[~2020-06-25 7:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-25 7:39 [PATCH v2 0/4] stm32-f7: Addition of SMBus Alert / Host-notify features Alain Volmat
2020-06-25 7:39 ` [PATCH v2 1/4] i2c: smbus: add core function handling SMBus host-notify Alain Volmat
2020-07-01 10:49 ` Wolfram Sang
2020-07-02 11:23 ` Alain Volmat
2020-06-25 7:39 ` [PATCH v2 2/4] i2c: addition of client hnotify reg/unreg callbacks Alain Volmat
2020-06-25 7:39 ` Alain Volmat [this message]
2020-06-30 19:41 ` [PATCH v2 3/4] dt-bindings: i2c-stm32: add SMBus Alert bindings Wolfram Sang
2020-07-14 2:30 ` Rob Herring
2020-07-21 6:22 ` Wolfram Sang
2020-06-25 7:39 ` [PATCH v2 4/4] i2c: stm32f7: Add SMBus-specific protocols support Alain Volmat
2020-06-30 16:05 ` [PATCH v2 0/4] stm32-f7: Addition of SMBus Alert / Host-notify features Wolfram Sang
2020-07-01 9:21 ` Alain Volmat
2020-07-01 9:28 ` Wolfram Sang
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