Merge pull request #276 from makermelissa/master

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / amlogic / meson_g12_common / pin.py

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 a6a9be1c6ed5ed3543cd1929153a3d31a273402c..165bca71db19a9a3b4c7340212f4aaf5f7ca5b9d 100644 (file)
--- a/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
+++ b/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
@@ -1,13 +1,17 @@
+"""
+G12A, G12B, and SM1 Common Definitions
+Ref:
+Linux kernel 4.9.y (hardkernel)
+    linux/include/dt-bindings/gpio/meson-g12a-gpio.h
+Linux kernel 5.4.y (mainline)
+    linux/include/dt-bindings/gpio/meson-g12a-gpio.h
+    linux/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+"""
+
+import re
 from adafruit_blinka.microcontroller.generic_linux.libgpiod_pin import Pin
 import gpiod
 
-# G12A, G12B, and SM1
-# Ref:
-# Linux kernel 4.9.y (hardkernel)
-#     linux/include/dt-bindings/gpio/meson-g12a-gpio.h
-# Linux kernel 5.4.y (mainline)
-#     linux/include/dt-bindings/gpio/meson-g12a-gpio.h
-
 chip0 = gpiod.Chip("0")
 chip1 = gpiod.Chip("1")
 
@@ -87,3 +91,49 @@ GPIOX_16 = GPIO492 = Pin((periphs, 81 + periphs_offset))
 GPIOX_17 = GPIO493 = Pin((periphs, 82 + periphs_offset))
 GPIOX_18 = GPIO494 = Pin((periphs, 83 + periphs_offset))
 GPIOX_19 = GPIO495 = Pin((periphs, 84 + periphs_offset))
+
+SPI0_SCLK = GPIOX_11
+SPI0_MISO = GPIOX_9
+SPI0_MOSI = GPIOX_8
+SPI0_CS0 = GPIOX_10
+
+# ordered as spiId, sckId, mosiId, misoId
+spiPorts = ((0, SPI0_SCLK, SPI0_MOSI, SPI0_MISO),)
+
+UART1_TX = GPIOX_12
+UART1_RX = GPIOX_13
+
+# ordered as uartId, txId, rxId
+uartPorts = ((1, UART1_TX, UART1_RX),)
+
+
+def get_dts_alias(device: str) -> str:
+    """Get the Device Tree Alias"""
+    uevent_path = "/sys/bus/platform/devices/" + device + "/uevent"
+    with open(uevent_path, "r") as fd:
+        pattern = r"^OF_ALIAS_0=(.*)$"
+        uevent = fd.read().split("\n")
+        for line in uevent:
+            match = re.search(pattern, line)
+            if match:
+                return match.group(1).upper()
+
+        return None
+
+
+# ordered as i2cId, sclId, sdaId
+i2cPorts = []
+
+alias = get_dts_alias("ffd1d000.i2c")
+if alias is not None:
+    globals()[alias + "_SCL"] = GPIOX_18
+    globals()[alias + "_SDA"] = GPIOX_17
+    i2cPorts.append((int(alias[3]), GPIOX_18, GPIOX_17))
+
+alias = get_dts_alias("ffd1c000.i2c")
+if alias is not None:
+    globals()[alias + "_SCL"] = GPIOA_15
+    globals()[alias + "_SDA"] = GPIOA_14
+    i2cPorts.append((int(alias[3]), GPIOA_15, GPIOA_14))
+
+i2cPorts = tuple(i2cPorts)