allwinner h618: support pwm

Author: Dangku

src/adafruit_blinka/microcontroller/allwinner/h618/pin.py

@@ -83,6 +83,7 @@ def find_gpiochip_number(target_label):
 PG18 = Pin((__chip_num, 210))
 TWI3_SDA = PG18
 PG19 = Pin((__chip_num, 211))
+PWM1 = PG19
 
 PH0 = Pin((__chip_num, 224))
 PH1 = Pin((__chip_num, 225))
@@ -124,6 +125,7 @@ def find_gpiochip_number(target_label):
 UART3_RX = PI10
 PI11 = Pin((__chip_num, 267))
 PI12 = Pin((__chip_num, 268))
+PWM2 = PI12
 PI13 = Pin((__chip_num, 269))
 UART4_TX = PI13
 PI14 = Pin((__chip_num, 270))
@@ -150,3 +152,9 @@ def find_gpiochip_number(target_label):
     (4, UART4_TX, UART4_RX),
     (5, UART5_TX, UART5_RX),
 )
+
+# SysFS pwm outputs, pwm channel and pin in first tuple
+pwmOuts = [
+    ((0, 1), PWM1),
+    ((0, 2), PWM2),
+]

src/pwmio.py

@@ -18,6 +18,8 @@
 
 if detector.board.any_raspberry_pi:
     from adafruit_blinka.microcontroller.bcm283x.pwmio.PWMOut import PWMOut
+elif detector.board.any_bananapi:
+    from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
 elif detector.board.any_coral_board:
     from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
 elif detector.board.any_giant_board: