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Subject[PATCH v9 4/8] dt-bindings: pwm: Support new PWM_USAGE_POWER flag
Date
Add the flag and corresponding documentation for PWM_USAGE_POWER.

Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
---
Documentation/devicetree/bindings/pwm/pwm.txt | 3 +++
include/dt-bindings/pwm/pwm.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/pwm.txt b/Documentation/devicetree/bindings/pwm/pwm.txt
index 084886bd721e..fe3a28f887c0 100644
--- a/Documentation/devicetree/bindings/pwm/pwm.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm.txt
@@ -46,6 +46,9 @@ period in nanoseconds.
Optionally, the pwm-specifier can encode a number of flags (defined in
<dt-bindings/pwm/pwm.h>) in a third cell:
- PWM_POLARITY_INVERTED: invert the PWM signal polarity
+- PWM_USAGE_POWER: Only care about the power output of the signal. This
+ allows drivers (if supported) to optimize the signals, for example to
+ improve EMI and reduce current spikes.

Example with optional PWM specifier for inverse polarity

diff --git a/include/dt-bindings/pwm/pwm.h b/include/dt-bindings/pwm/pwm.h
index ab9a077e3c7d..0d5a8f0c0035 100644
--- a/include/dt-bindings/pwm/pwm.h
+++ b/include/dt-bindings/pwm/pwm.h
@@ -11,5 +11,6 @@
#define _DT_BINDINGS_PWM_PWM_H

#define PWM_POLARITY_INVERTED (1 << 0)
+#define PWM_USAGE_POWER (1 << 1)

#endif
--
2.31.1
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