1 files changed, 139 insertions, 0 deletions
diff --git a/zephyr/emul/emul_rtc.c b/zephyr/emul/emul_rtc.c
new file mode 100644
index 0000000000..45741a5277
--- /dev/null
+++ b/zephyr/emul/emul_rtc.c
@@ -0,0 +1,139 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#define DT_DRV_COMPAT cros_ec_rtc_emul
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(emul_rtc);
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/emul.h>
+#include <ec_commands.h>
+#include <drivers/cros_rtc.h>
+#include <zephyr/sys/__assert.h>
+
+#include "flash.h"
+
+struct cros_rtc_emul_data {
+	const struct device *rtc_dev;
+	uint32_t alarm_time;
+	cros_rtc_alarm_callback_t alarm_callback;
+	uint32_t value;
+};
+
+struct rtc_emul_cfg {
+	/** Pointer to run-time data */
+	struct cros_rtc_emul_data *data;
+};
+
+#define RTC_DEV DT_CHOSEN(zephyr_rtc_controller)
+
+#define DRV_DATA(dev) ((struct cros_rtc_emul_data *)(dev)->data)
+
+static int cros_rtc_emul_configure(const struct device *dev,
+				   cros_rtc_alarm_callback_t callback)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	if (callback == NULL) {
+		return -EINVAL;
+	}
+
+	data->alarm_callback = callback;
+
+	return EC_SUCCESS;
+}
+
+static int cros_rtc_emul_get_value(const struct device *dev, uint32_t *value)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	*value = data->value;
+
+	return EC_SUCCESS;
+}
+
+static int cros_rtc_emul_set_value(const struct device *dev, uint32_t value)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	data->value = value;
+
+	return EC_SUCCESS;
+}
+
+static int cros_rtc_emul_get_alarm(const struct device *dev, uint32_t *seconds,
+				   uint32_t *microseconds)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	*seconds = data->alarm_time;
+	*microseconds = 0;
+
+	return EC_SUCCESS;
+}
+
+static int cros_rtc_emul_reset_alarm(const struct device *dev)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	data->alarm_time = 0;
+
+	return EC_SUCCESS;
+}
+
+static int cros_rtc_emul_set_alarm(const struct device *dev, uint32_t seconds,
+				   uint32_t microseconds)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+	int ret;
+
+	ARG_UNUSED(microseconds);
+
+	ret = cros_rtc_emul_reset_alarm(dev);
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	data->alarm_time = seconds;
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return EC_SUCCESS;
+}
+
+static const struct cros_rtc_driver_api emul_cros_rtc_driver_api = {
+	.configure = cros_rtc_emul_configure,
+	.get_value = cros_rtc_emul_get_value,
+	.set_value = cros_rtc_emul_set_value,
+	.get_alarm = cros_rtc_emul_get_alarm,
+	.set_alarm = cros_rtc_emul_set_alarm,
+	.reset_alarm = cros_rtc_emul_reset_alarm,
+};
+
+static int rtc_emul_init(const struct device *dev)
+{
+	struct cros_rtc_emul_data *data = DRV_DATA(dev);
+
+	data->alarm_callback = NULL;
+	data->alarm_time = 0;
+	data->value = 0;
+
+	return EC_SUCCESS;
+}
+
+#define RTC_EMUL(n)                                                            \
+	static struct cros_rtc_emul_data cros_rtc_emul_data_##n = {};          \
+	static const struct rtc_emul_cfg rtc_emul_cfg_##n = {                  \
+		.data = &cros_rtc_emul_data_##n,                               \
+	};                                                                     \
+	DEVICE_DT_INST_DEFINE(n, rtc_emul_init, NULL, &cros_rtc_emul_data_##n, \
+			      &rtc_emul_cfg_##n, PRE_KERNEL_1,                 \
+			      CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,             \
+			      &emul_cros_rtc_driver_api)
+DT_INST_FOREACH_STATUS_OKAY(RTC_EMUL);