zephyr: test: add a generic I2C mock

Add a simple mock with no state to test common i2c code.

BRANCH=none
BUG=b:200589041
TEST=zmake testall

Signed-off-by: Yuval Peress <peress@chromium.org>
Change-Id: I99730361a298708278106deb58890a0ed2c9febf
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3171694
Tested-by: Yuval Peress <peress@google.com>
Reviewed-by: Jeremy Bettis <jbettis@chromium.org>
Commit-Queue: Yuval Peress <peress@google.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/zephyr/include/emul/i2c_mock.h b/zephyr/include/emul/i2c_mock.h
new file mode 100644
index 0000000000..e9e8d97252
--- /dev/null
+++ b/zephyr/include/emul/i2c_mock.h
@@ -0,0 +1,35 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef ZEPHYR_INCLUDE_EMUL_I2C_MOCK_H_
+#define ZEPHYR_INCLUDE_EMUL_I2C_MOCK_H_
+
+#include <emul.h>
+#include <drivers/i2c_emul.h>
+
+/**
+ * @brief reset the I2C mock.
+ *
+ * @param emul The mock device to reset.
+ */
+void i2c_mock_reset(const struct emul *emul);
+
+/**
+ * @brief Get the i2c emulator pointer from the top level mock.
+ *
+ * @param emul The mock device to query
+ * @return Pointer to the i2c emulator struct
+ */
+struct i2c_emul *i2c_mock_to_i2c_emul(const struct emul *emul);
+
+/**
+ * @brief Get the I2C address of the mock
+ *
+ * @param emul The mock device to query
+ * @return The address on the I2C bus
+ */
+uint16_t i2c_mock_get_addr(const struct emul *emul);
+
+#endif /* ZEPHYR_INCLUDE_EMUL_I2C_MOCK_H_ */