github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 00:53:34 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

dt-bindings: pinctrl: realtek: Improve 'realtek,duty-cycle' description

Browse Source 
The previous description was misleading because this hardware block is not
a PWM generator. It does not generate a signal with a specific frequency
and duty ratio.

Instead, it provides a fixed nanosecond-level adjustment to the rising/
falling edges of an existing signal.

The property name is kept as 'realtek,duty-cycle' rather than being
renamed to strictly preserve Device Tree ABI backward compatibility.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Yu-Chun Lin 2026-03-17 19:54:06 +08:00 committed by Linus Walleij
parent 00a5d1e71c
commit 56624479a9
3 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/devicetree/bindings/pinctrl/realtek,rtd1315e-pinctrl.yaml
View File

@ -135,8 +135,11 @@ patternProperties:
realtek,duty-cycle:
description: |
An integer describing the level to adjust output duty cycle, controlling
the proportion of positive and negative waveforms in nanoseconds.
An integer describing the level to adjust the output pulse width, it
provides a fixed nanosecond-level adjustment to the rising/falling
edges of an existing signal. It is used for Signal Integrity tuning
(adding/subtracting delay to fine-tune the high/low duration), rather
than generating a specific PWM frequency.
Valid arguments are described as below:
0: 0ns
2: + 0.25ns

7
Documentation/devicetree/bindings/pinctrl/realtek,rtd1319d-pinctrl.yaml
View File

@ -134,8 +134,11 @@ patternProperties:
realtek,duty-cycle:
description: |
An integer describing the level to adjust output duty cycle, controlling
the proportion of positive and negative waveforms in nanoseconds.
An integer describing the level to adjust the output pulse width, it
provides a fixed nanosecond-level adjustment to the rising/falling
edges of an existing signal. It is used for Signal Integrity tuning
(adding/subtracting delay to fine-tune the high/low duration), rather
than generating a specific PWM frequency.
Valid arguments are described as below:
0: 0ns
2: + 0.25ns

7
Documentation/devicetree/bindings/pinctrl/realtek,rtd1619b-pinctrl.yaml
View File

@ -133,8 +133,11 @@ patternProperties:
realtek,duty-cycle:
description: |
An integer describing the level to adjust output duty cycle, controlling
the proportion of positive and negative waveforms in nanoseconds.
An integer describing the level to adjust the output pulse width, it
provides a fixed nanosecond-level adjustment to the rising/falling
edges of an existing signal. It is used for Signal Integrity tuning
(adding/subtracting delay to fine-tune the high/low duration), rather
than generating a specific PWM frequency.
Valid arguments are described as below:
0: 0ns
2: + 0.25ns