Thread (63 messages) 63 messages, 6 authors, 2024-02-29

Re: [PATCH 01/13] dt-bindings: i2c: nomadik: add timeout-usecs property bindings

From: Krzysztof Kozlowski <hidden>
Date: 2024-02-16 09:17:49
Also in: linux-devicetree, linux-i2c, linux-mips, lkml

On 16/02/2024 10:16, Théo Lebrun wrote:
Hello,

On Fri Feb 16, 2024 at 3:27 AM CET, Rob Herring wrote:
quoted
On Thu, Feb 15, 2024 at 05:52:08PM +0100, Théo Lebrun wrote:
quoted
Expose I2C device timeout configuration from devicetree. Use µs as time
unit and express it in the name.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
 Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml | 5 +++++
 1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
index 16024415a4a7..e6b95e3765ac 100644
--- a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
@@ -70,6 +70,10 @@ properties:
     minimum: 1
     maximum: 400000
 
+  timeout-usecs:
Use standard unit suffixes.

We already have at least 2 device specific timeout properties. This one 
should be common. That means you need to add it to i2c-controller.yaml 
in dtschema. GH PR or patch to devicetree-spec list is fine.
i2c-mpc (fsl,timeout) and i2c-gpio (i2c-gpio,timeout-ms). I agree this
prop has no reason to be compatible-specific.

Feedback from dt-bindings and I2C host maintainers would be useful: what
should the property be named? Having the unit makes it self-descriptive,
which sounds like a good idea to me. timeout-usecs, timeout-us, another
option?
It must have an unit. That's not negotiable for new properties.

Best regards,
Krzysztof


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