dt: pwm: add support for specifying frequency in Hz and kHz

Add a pair of dt macros for specifying the pwm frequency in hertz or kilohertz: PWM_HZ and PWM_KHZ. This is then converted in period nanoseconds so it works as expected with the other definitions. Signed-off-by: Fabio Baltieri <[email protected]>
zephyrproject-rtos · Apr 27, 2022 · 82634ed · 82634ed
1 parent 1e02dd0
commit 82634ed
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/zephyr/dt-bindings/pwm/pwm.h b/include/zephyr/dt-bindings/pwm/pwm.h
@@ -21,6 +21,10 @@
 #define PWM_MSEC(x)	(PWM_USEC(x) * 1000UL)
 /** Specify PWM period in seconds */
 #define PWM_SEC(x)	(PWM_MSEC(x) * 1000UL)
+/** Specify PWM frequency in hertz */
+#define PWM_HZ(x)	(PWM_SEC(1UL) / (x))
+/** Specify PWM frequency in kilohertz */
+#define PWM_KHZ(x)	(PWM_HZ((x) * 1000UL))
 
 /** @} */