diff --git a/src/adafruit_blinka/board/hardkernel/odroidc4.py b/src/adafruit_blinka/board/hardkernel/odroidc4.py
index 34e1acec..fd7af822 100644
--- a/src/adafruit_blinka/board/hardkernel/odroidc4.py
+++ b/src/adafruit_blinka/board/hardkernel/odroidc4.py
@@ -16,7 +16,9 @@
 SCLK = pin.SPI0_SCLK
 MOSI = pin.SPI0_MOSI
 MISO = pin.SPI0_MISO
-SPI_CS0 = pin.SPI0_CS0
+CS0 = pin.SPI0_CS0
+CS1 = pin.GPIOH_6
+SPI_CS0 = CS0  # aliased for backward compatibility
 
 """J2: physical pin number"""
 
@@ -57,3 +59,10 @@
 """ ADC """
 A0 = 40
 A1 = 37
+
+""" PWM """
+PWM = D15
+
+""" UART """
+UART0_TX = D8
+UART0_RX = D10
diff --git a/src/adafruit_blinka/board/hardkernel/odroidm1.py b/src/adafruit_blinka/board/hardkernel/odroidm1.py
index 7093fc41..23ec8885 100644
--- a/src/adafruit_blinka/board/hardkernel/odroidm1.py
+++ b/src/adafruit_blinka/board/hardkernel/odroidm1.py
@@ -31,18 +31,20 @@
 D33 = pin.GPIO0B_5
 D35 = pin.GPIO3D_5
 
-SDA = D27
-SCL = D28
+SDA = D3
+SCL = D5
 
 SCLK = D23
 MOSI = D19
 MISO = D21
-CS = D24
+CS0 = D24
+CS1 = D26
+CS = CS0  # aliased for backward compatibility
 
-UART0_TX = D13
-UART0_RX = D11
-UART1_TX = D8
-UART1_RX = D10
+UART0_TX = D8
+UART0_RX = D10
+UART1_TX = D13
+UART1_RX = D11
 
 UART1_CTS = D29
 UART1_RTS = D31
@@ -55,3 +57,6 @@
 """ ADC """
 A0 = 40
 A1 = 37
+
+""" PWM """
+PWM = D15
diff --git a/src/adafruit_blinka/board/hardkernel/odroidm1s.py b/src/adafruit_blinka/board/hardkernel/odroidm1s.py
index 4b5d6007..3ed43a50 100644
--- a/src/adafruit_blinka/board/hardkernel/odroidm1s.py
+++ b/src/adafruit_blinka/board/hardkernel/odroidm1s.py
@@ -37,18 +37,20 @@
 EXT_D13 = pin.GPIO3_B3
 EXT_D14 = pin.GPIO3_B4
 
-SDA = D27
-SCL = D28
+SDA = D3
+SCL = D5
 
 SCLK = D23
 MOSI = D19
 MISO = D21
-CS = D24
+CS0 = D24
+CS1 = D26
+CS = CS0  # aliased for backward compatibility
 
-UART0_TX = D13
-UART0_RX = D11
-UART1_TX = D8
-UART1_RX = D10
+UART0_TX = D8
+UART0_RX = D10
+UART1_TX = D13
+UART1_RX = D11
 
 UART1_CTS = D29
 UART1_RTS = D31
@@ -61,3 +63,6 @@
 """ ADC """
 A0 = 40
 A1 = 37
+
+""" PWM """
+PWM = D15
diff --git a/src/adafruit_blinka/board/hardkernel/odroidn2.py b/src/adafruit_blinka/board/hardkernel/odroidn2.py
index 782fbd26..c88f1ded 100644
--- a/src/adafruit_blinka/board/hardkernel/odroidn2.py
+++ b/src/adafruit_blinka/board/hardkernel/odroidn2.py
@@ -58,47 +58,50 @@
     globals()["SCL" + str(it[0])] = it[1]
     globals()["SDA" + str(it[0])] = it[2]
 
-SCL = None
-SDA = None
-# Set second i2c bus as default for backward compatibility.
-if len(pin.i2cPorts) > 1:
-    SCL = pin.i2cPorts[1][1]
-    SDA = pin.i2cPorts[1][2]
-elif len(pin.i2cPorts) > 0:
+if pin.i2cPorts:
     SCL = pin.i2cPorts[0][1]
     SDA = pin.i2cPorts[0][2]
 
 SCLK = pin.SPI0_SCLK
 MOSI = pin.SPI0_MOSI
 MISO = pin.SPI0_MISO
-SPI_CS0 = pin.GPIO486
+CS0 = pin.GPIO486
+CS1 = pin.GPIO464
+SPI_CS0 = CS0  # aliased for backward compatibility
 
-D0 = GPIOX_3  # PIN_11
-D1 = GPIOX_16  # PIN_12
-D2 = GPIOX_4  # PIN_13
-D3 = GPIOX_7  # PIN_15
-D4 = GPIOX_0  # PIN_16
-D5 = GPIOX_1  # PIN_18
-D6 = GPIOX_2  # PIN_22
-D7 = GPIOA_13  # PIN_7
-D8 = GPIOX_17  # PIN_3
-D9 = GPIOX_18  # PIN_5
-D10 = GPIOX_10  # PIN_24
-D11 = GPIOA_4  # PIN_26
-D12 = GPIOX_8  # PIN_19
-D13 = GPIOX_9  # PIN_21
-D14 = GPIOX_11  # PIN_23
-D15 = GPIOX_12  # PIN_8
-D16 = GPIOX_13  # PIN_10
-D21 = GPIOX_14  # PIN_29
-D22 = GPIOX_15  # PIN_31
-D23 = GPIOX_5  # PIN_33
-D24 = GPIOX_6  # PIN_35
-D26 = GPIOA_12  # PIN_32
-D27 = GPIOX_19  # PIN_36
-D30 = GPIOA_14  # PIN_27
-D31 = GPIOA_15  # PIN_28
+D3 = GPIOX_17
+D5 = GPIOX_18
+D7 = GPIOA_13
+D8 = GPIOX_12
+D10 = GPIOX_13
+D11 = GPIOX_3
+D12 = GPIOX_16
+D13 = GPIOX_4
+D15 = GPIOX_7
+D16 = GPIOX_0
+D18 = GPIOX_1
+D19 = GPIOX_8
+D21 = GPIOX_9
+D22 = GPIOX_2
+D23 = GPIOX_11
+D24 = GPIOX_10
+D26 = GPIOA_4
+D27 = GPIOA_14
+D28 = GPIOA_15
+D29 = GPIOX_14
+D31 = GPIOX_15
+D32 = GPIOA_12
+D33 = GPIOX_5
+D35 = GPIOX_6
+D36 = GPIOX_19
 
 """ ADC """
 A0 = 40
 A1 = 37
+
+""" PWM """
+PWM = D15
+
+""" UART """
+UART0_TX = D8
+UART0_RX = D10
diff --git a/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py b/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
index f44f92a0..c18e9d94 100644
--- a/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
+++ b/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
@@ -13,7 +13,7 @@
 """
 
 from adafruit_blinka.agnostic import detector
-from adafruit_blinka.microcontroller.alias import get_dts_alias
+from adafruit_blinka.microcontroller.alias import get_dts_alias, get_pwm_chipid
 from adafruit_blinka.microcontroller.generic_linux.libgpiod_pin import Pin
 
 try:
@@ -131,6 +131,9 @@
 # ordered as spiId, sckId, mosiId, misoId
 spiPorts = ((0, SPI0_SCLK, SPI0_MOSI, SPI0_MISO),)
 
+# SysFs pwm outputs, pwm channel and pin in first tuple
+pwmOuts = []
+
 # ordered as uartId, txId, rxId
 uartPorts = [
     (1, UART1_TX, UART1_RX),
@@ -151,24 +154,55 @@
         globals()[alias + "_SCL"] = GPIOA_15
         globals()[alias + "_SDA"] = GPIOA_14
         i2cPorts.append((int(alias[-1]), GPIOA_15, GPIOA_14))
-    alias = get_dts_alias("fdd24000.serial")
+    alias = get_dts_alias("ffd24000.serial")
     if alias is not None:
         globals()[alias + "_TX"] = GPIOX_12
         globals()[alias + "_RX"] = GPIOX_13
         uartPorts.append((int(alias[-1]), GPIOX_12, GPIOX_13))
-    alias = get_dts_alias("fdd23000.serial")
+    alias = get_dts_alias("ffd23000.serial")
     if alias is not None:
         globals()[alias + "_TX"] = GPIOX_6
         globals()[alias + "_RX"] = GPIOX_7
         uartPorts.append((int(alias[-1]), GPIOX_6, GPIOX_7))
 
 if board in ("ODROID_C4"):
+    alias = get_pwm_chipid("ffd1b000.pwm")
+    if alias is not None:
+        globals()["PWMA"] = GPIOX_6
+        globals()["PWMB"] = GPIOX_19
+        pwmOuts.append(((int(alias[-1]), 0), GPIOX_6))
+        pwmOuts.append(((int(alias[-1]), 1), GPIOX_19))
+    alias = get_pwm_chipid("ffd1a000.pwm")
+    if alias is not None:
+        globals()["PWMC"] = GPIOX_5
+        globals()["PWMD"] = GPIOX_3
+        pwmOuts.append(((int(alias[-1]), 0), GPIOX_5))
+        pwmOuts.append(((int(alias[-1]), 1), GPIOX_3))
+    alias = get_pwm_chipid("ffd19000.pwm")
+    if alias is not None:
+        globals()["PWME"] = GPIOX_16
+        globals()["PWMF"] = GPIOH_5
+        pwmOuts.append(((int(alias[-1]), 0), GPIOX_16))
+        pwmOuts.append(((int(alias[-1]), 1), GPIOH_5))
     analogIns.append((37, 0, 2))
     analogIns.append((40, 0, 0))
 if board in ("ODROID_N2"):
+    alias = get_pwm_chipid("ffd1a000.pwm")
+    if alias is not None:
+        globals()["PWMC"] = GPIOX_5
+        globals()["PWMD"] = GPIOX_6
+        pwmOuts.append(((int(alias[-1]), 0), GPIOX_5))
+        pwmOuts.append(((int(alias[-1]), 1), GPIOX_6))
+    alias = get_pwm_chipid("ffd19000.pwm")
+    if alias is not None:
+        globals()["PWME"] = GPIOX_16
+        globals()["PWMF"] = GPIOX_7
+        pwmOuts.append(((int(alias[-1]), 0), GPIOX_16))
+        pwmOuts.append(((int(alias[-1]), 1), GPIOX_7))
     analogIns.append((37, 0, 3))
     analogIns.append((40, 0, 2))
 
 analogIns = tuple(analogIns)
 i2cPorts = tuple(i2cPorts)
+pwmOuts = tuple(pwmOuts)
 uartPorts = tuple(uartPorts)