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Message-ID: <20231018210805.1569987-2-chris.packham@alliedtelesis.co.nz>
Date: Thu, 19 Oct 2023 10:08:04 +1300
From: Chris Packham <chris.packham@...iedtelesis.co.nz>
To: gregory.clement@...tlin.com, andi.shyti@...nel.org,
robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
conor+dt@...nel.org
Cc: linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH v3 1/2] dt-bindings: i2c: mv64xxx: add reset-gpios property
Add reset-gpios and reset-duration-us properties to the
marvell,mv64xxx-i2c binding. These can be used to describe hardware
where a common reset GPIO is connected to all downstream devices on and
I2C bus. This reset will be asserted then released before the downstream
devices on the bus are probed.
Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---
Notes:
Changes in v3:
- Rename reset-delay-us to reset-duration-us to better reflect its
purpose
- Add default: for reset-duration-us
- Add description: for reset-gpios
Changes in v2:
- Update commit message
- Add reset-delay-us property
.../devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
index 461d1c9ee3f7..ecf5b279cfa4 100644
--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -70,6 +70,16 @@ properties:
resets:
maxItems: 1
+ reset-gpios:
+ description:
+ GPIO pin providing a common reset for all downstream devices. This GPIO
+ will be asserted then released before the downstream devices are probed.
+ maxItems: 1
+
+ reset-duration-us:
+ description: Reset duration in us.
+ default: 1
+
dmas:
items:
- description: RX DMA Channel
--
2.42.0
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