Derive the release protocol.

lib/ina219.ex

@@ -1,5 +1,5 @@
 defmodule INA219 do
-  @derive [Wafer.Chip, Wafer.DeviceID]
+  @derive [Wafer.Chip, Wafer.DeviceID, Wafer.Release]
   defstruct ~w[conn current_divisor power_divisor]a
   @behaviour Wafer.Conn
   alias Wafer.Conn
@@ -54,14 +54,6 @@ defmodule INA219 do
     end
   end
 
-  @doc """
-  Release the connection to the device.
-  """
-  @spec release(t) :: :ok
-  @impl Wafer.Conn
-  def release(%INA219{conn: %{__struct__: mod} = inner} = _conn),
-    do: apply(mod, :release, [inner])
-
   @doc """
   Power-on-reset the device,
   """

mix.exs

@@ -34,13 +34,13 @@ defmodule INA219.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:ex_doc, ">= 0.0.0", only: [:dev, :test]},
-      {:earmark, ">= 0.0.0", only: [:dev, :test]},
-      {:mimic, "~> 1.1", only: :test},
+      {:circuits_i2c, "~> 0.3", optional: true},
       {:credo, "~> 1.1", only: [:dev, :test], runtime: false},
-      {:wafer, git: "https://gitlab.com/jimsy/wafer"},
+      {:earmark, ">= 0.0.0", only: [:dev, :test]},
       {:elixir_ale, "~> 1.2", optional: true},
-      {:circuits_i2c, "~> 0.3", optional: true}
+      {:ex_doc, ">= 0.0.0", only: [:dev, :test]},
+      {:mimic, "~> 1.1", only: :test},
+      {:wafer, "~> 0.1"}
     ]
   end
 end

mix.lock

@@ -11,5 +11,5 @@
   "makeup_elixir": {:hex, :makeup_elixir, "0.14.0", "cf8b7c66ad1cff4c14679698d532f0b5d45a3968ffbcbfd590339cb57742f1ae", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm"},
   "mimic": {:hex, :mimic, "1.1.3", "3bad83d5271b4faa7bbfef587417a6605cbbc802a353395d446a1e5f46fe7115", [:mix], [], "hexpm"},
   "nimble_parsec": {:hex, :nimble_parsec, "0.5.1", "c90796ecee0289dbb5ad16d3ad06f957b0cd1199769641c961cfe0b97db190e0", [:mix], [], "hexpm"},
-  "wafer": {:git, "https://gitlab.com/jimsy/wafer", "b5181189ef664831d0403e5d80312f5cbae10f0c", []},
+  "wafer": {:hex, :wafer, "0.1.0", "8ca31024770f77ff1457a5ae413ae0158e9a713bd8c65aeeb0d7426ca36439e2", [:mix], [{:circuits_gpio, "~> 0.4", [hex: :circuits_gpio, repo: "hexpm", optional: true]}, {:circuits_i2c, "~> 0.3", [hex: :circuits_i2c, repo: "hexpm", optional: true]}, {:circuits_spi, "~> 0.1", [hex: :circuits_spi, repo: "hexpm", optional: true]}, {:elixir_ale, "~> 1.2", [hex: :elixir_ale, repo: "hexpm", optional: true]}], "hexpm"},
 }

test/ina219_test.exs

@@ -19,20 +19,6 @@ defmodule INA219Test do
     end
   end
 
-  describe "release/1" do
-    test "calls `release/1` on the upstream driver" do
-      conn = conn()
-
-      Fake
-      |> expect(:release, 1, fn driver ->
-        assert driver == conn.conn
-        :ok
-      end)
-
-      assert :ok = INA219.release(conn)
-    end
-  end
-
   describe "reset/1" do
     test "sets the MSB to 1" do
       INA219.Registers