nRF52: Add clock device (#564)

Author: Grazfather

port/nordic/nrf5x/src/hal/drivers.zig

@@ -109,3 +109,25 @@ pub const I2C_Device = struct {
         };
     }
 };
+
+///
+/// Implementation of a time device
+///
+pub const ClockDevice = struct {
+    pub fn clock_device(td: *ClockDevice) Clock_Device {
+        _ = td;
+        return Clock_Device{
+            .ptr = undefined,
+            .vtable = &vtable,
+        };
+    }
+    const vtable = Clock_Device.VTable{
+        .get_time_since_boot = get_time_since_boot_fn,
+    };
+
+    fn get_time_since_boot_fn(td: *anyopaque) time.Absolute {
+        _ = td;
+        const t = hal.time.get_time_since_boot().to_us();
+        return @enumFromInt(t);
+    }
+};

port/nordic/nrf5x/src/hal/uart.zig

@@ -148,7 +148,7 @@ pub const UART = enum(u1) {
             .nrf52840 => regs.PSEL.TXD.write(.{
                 .PIN = pin.index(),
                 .PORT = pin.port(),
-                .CONNECT = @enumFromInt(0), // 0 means connected lol
+                .CONNECT = .Connected,
             }),
         }
     }
@@ -160,7 +160,7 @@ pub const UART = enum(u1) {
             .nrf52840 => regs.PSEL.RXD.write(.{
                 .PIN = pin.index(),
                 .PORT = pin.port(),
-                .CONNECT = @enumFromInt(0), // 0 means connected lol
+                .CONNECT = .Connected,
             }),
         }
     }