zephyr: emul: lis2dw12: Add stubs for LIS2DW12 emulator

BRANCH=none
BUG=b:200046770
TEST=zmake configure --test zephyr/test/drivers

Signed-off-by: Yuval Peress <peress@chromium.org>
Change-Id: If425d9760b8db9024478fb9a664ffa71e7c25eb7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3168034
Tested-by: Yuval Peress <peress@google.com>
Reviewed-by: Jeremy Bettis <jbettis@chromium.org>
Commit-Queue: Yuval Peress <peress@google.com>

8 files changed, 146 insertions, 0 deletions

diff --git a/zephyr/dts/bindings/emul/cros,lis2dw12-emul.yaml b/zephyr/dts/bindings/emul/cros,lis2dw12-emul.yaml
new file mode 100644
index 0000000000..44c29fbe56
--- /dev/null
+++ b/zephyr/dts/bindings/emul/cros,lis2dw12-emul.yaml
@@ -0,0 +1,12 @@
+# 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.
+
+description: CROS implementation of the LIS2DW12 emulator
+
+compatible: "cros,lis2dw12-emul"
+
+include: base.yaml
+properties:
+  reg:
+    required: true
diff --git a/zephyr/emul/CMakeLists.txt b/zephyr/emul/CMakeLists.txt
index 5c5a69eb35..b46c51c8b6 100644
--- a/zephyr/emul/CMakeLists.txt
+++ b/zephyr/emul/CMakeLists.txt
@@ -13,3 +13,4 @@ zephyr_library_sources_ifdef(CONFIG_EMUL_BMI		emul_bmi260.c)
 zephyr_library_sources_ifdef(CONFIG_EMUL_TCS3400	emul_tcs3400.c)
 zephyr_library_sources_ifdef(CONFIG_EMUL_BB_RETIMER	emul_bb_retimer.c)
 zephyr_library_sources_ifdef(CONFIG_EMUL_LN9310		emul_ln9310.c)
+zephyr_library_sources_ifdef(CONFIG_EMUL_LIS2DW12	emul_lis2dw12.c)
diff --git a/zephyr/emul/Kconfig b/zephyr/emul/Kconfig
index f52c27349b..c108caea4b 100644
--- a/zephyr/emul/Kconfig
+++ b/zephyr/emul/Kconfig
@@ -68,3 +68,4 @@ config EMUL_BB_RETIMER
 	  available in zephyr/include/emul/emul_bb_retimer.h
 
 rsource "Kconfig.ln9310"
+rsource "Kconfig.lis2dw12"
diff --git a/zephyr/emul/Kconfig.lis2dw12 b/zephyr/emul/Kconfig.lis2dw12
new file mode 100644
index 0000000000..2263255418
--- /dev/null
+++ b/zephyr/emul/Kconfig.lis2dw12
@@ -0,0 +1,23 @@
+# 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.
+
+DT_COMPAT_LIS2DW12_EMUL := cros,lis2dw12-emul
+
+menuconfig EMUL_LIS2DW12
+	bool "LIS2DW12 accelerometer emulator"
+	default $(dt_compat_enabled,$(DT_COMPAT_LIS2DW12_EMUL))
+	depends on I2C_EMUL
+	select PLATFORM_EC_ACCEL_LIS2DW12
+	help
+	  Enable the LIS2DW12 emulator. This driver uses the emulated I2C bus.
+	  It is used to test the lis2dw12 driver. Emulator API is available in
+	  zephyr/include/emul/emul_lis2dw12.h
+
+if EMUL_LIS2DW12
+
+module = LIS2DW12_EMUL
+module-str = lis2dw12_emul
+source "subsys/logging/Kconfig.template.log_config"
+
+endif # EMUL_LIS2DW12
diff --git a/zephyr/emul/emul_lis2dw12.c b/zephyr/emul/emul_lis2dw12.c
new file mode 100644
index 0000000000..e775bdbb20
--- /dev/null
+++ b/zephyr/emul/emul_lis2dw12.c
@@ -0,0 +1,69 @@
+/* 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.
+ */
+
+#define DT_DRV_COMPAT cros_lis2dw12_emul
+
+#include <device.h>
+#include <drivers/i2c.h>
+#include <drivers/i2c_emul.h>
+#include <emul.h>
+#include <errno.h>
+#include <sys/__assert.h>
+
+#include "driver/accel_lis2dw12.h"
+#include "emul/emul_common_i2c.h"
+#include "emul/emul_lis2dw12.h"
+#include "i2c.h"
+
+#include <logging/log.h>
+LOG_MODULE_REGISTER(lis2dw12_emul, CONFIG_LIS2DW12_EMUL_LOG_LEVEL);
+
+struct lis2dw12_emul_data {
+	/** Common I2C data */
+	struct i2c_common_emul_data common;
+};
+
+struct lis2dw12_emul_cfg {
+	/** Common I2C config */
+	struct i2c_common_emul_cfg common;
+};
+
+static struct i2c_emul_api lis2dw12_emul_api_i2c = {
+	.transfer = i2c_common_emul_transfer,
+};
+
+static int emul_lis2dw12_init(const struct emul *emul,
+			      const struct device *parent)
+{
+	const struct lis2dw12_emul_cfg *lis2dw12_cfg = emul->cfg;
+	const struct i2c_common_emul_cfg *cfg = &(lis2dw12_cfg->common);
+	struct lis2dw12_emul_data *data = emul->data;
+
+	data->common.emul.api = &lis2dw12_emul_api_i2c;
+	data->common.emul.addr = cfg->addr;
+	data->common.emul.parent = emul;
+	data->common.i2c = parent;
+	data->common.cfg = cfg;
+	i2c_common_emul_init(&data->common);
+
+	return i2c_emul_register(parent, emul->dev_label, &data->common.emul);
+}
+
+#define INIT_LIS2DW12(n)                                                  \
+	static struct lis2dw12_emul_data lis2dw12_emul_data_##n = {       \
+		.common = {                                               \
+		},                                                        \
+	};                                                                \
+	static const struct lis2dw12_emul_cfg lis2dw12_emul_cfg_##n = {   \
+		.common = {                                               \
+			.i2c_label = DT_INST_BUS_LABEL(n),                \
+			.dev_label = DT_INST_LABEL(n),                    \
+			.addr = DT_INST_REG_ADDR(n),                      \
+		},                                                        \
+	};                                                                \
+	EMUL_DEFINE(emul_lis2dw12_init, DT_DRV_INST(n),                   \
+		    &lis2dw12_emul_cfg_##n, &lis2dw12_emul_data_##n)
+
+DT_INST_FOREACH_STATUS_OKAY(INIT_LIS2DW12)
diff --git a/zephyr/emul/emul_ln9310.c b/zephyr/emul/emul_ln9310.c
index 19e3fc7276..9298767d67 100644
--- a/zephyr/emul/emul_ln9310.c
+++ b/zephyr/emul/emul_ln9310.c
@@ -14,6 +14,7 @@
 
 #include "driver/ln9310.h"
 #include "emul/emul_common_i2c.h"
+#include "emul/emul_ln9310.h"
 #include "i2c.h"
 
 #include <logging/log.h>
diff --git a/zephyr/include/emul/emul_lis2dw12.h b/zephyr/include/emul/emul_lis2dw12.h
new file mode 100644
index 0000000000..ce34887da8
--- /dev/null
+++ b/zephyr/include/emul/emul_lis2dw12.h
@@ -0,0 +1,9 @@
+/* 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_EMUL_LIS2DW12_H_
+#define ZEPHYR_INCLUDE_EMUL_EMUL_LIS2DW12_H_
+
+#endif /* ZEPHYR_INCLUDE_EMUL_EMUL_LIS2DW12_H_ */
diff --git a/zephyr/test/drivers/overlay.dts b/zephyr/test/drivers/overlay.dts
index 56027a7138..adf90fbc6c 100644
--- a/zephyr/test/drivers/overlay.dts
+++ b/zephyr/test/drivers/overlay.dts
@@ -9,6 +9,7 @@
 	aliases {
 		bmi260-int = &ms_bmi260_accel;
 		bmi160-int = &ms_bmi160_accel;
+		lis2dw12-int = &ms_lis2dw12_accel;
 		tcs3400-int = &tcs3400_clear;
 	};
 	named-gpios {
@@ -207,6 +208,10 @@
 		mutex_bmi160: bmi160-mutex {
 			label = "BMI160_MUTEX";
 		};
+
+		mutex_lis2dw12: lis2dw12-mutex {
+			label = "LIS2DW12_MUTEX";
+		};
 	};
 
 	/*
@@ -224,6 +229,11 @@
 			status = "okay";
 		};
 
+		lis2dw12_data: lis2dw12-drv-data {
+			compatible = "cros-ec,drvdata-lis2dw12";
+			status = "okay";
+		};
+
 		tcs_clear_data: tcs3400-clear-drv-data {
 			compatible = "cros-ec,drvdata-tcs3400-clear";
 			status = "okay";
@@ -347,6 +357,19 @@
 			i2c-spi-addr-flags = "BMI160_ADDR0_FLAGS";
 		};
 
+		ms_lis2dw12_accel: ms-lis2dw12-accel {
+			compatible = "cros-ec,lis2dw12";
+			status = "okay";
+
+			label = "LIS2DW12";
+			location = "MOTIONSENSE_LOC_BASE";
+			mutex = <&mutex_lis2dw12>;
+			port = <&i2c_accel>;
+			drv-data = <&lis2dw12_data>;
+			default-range = <2>;
+			i2c-spi-addr-flags = "LIS2DWL_ADDR1_FLAGS";
+		};
+
 		tcs3400_clear: tcs3400-clear {
 			compatible = "cros-ec,tcs3400-clear";
 			status = "okay";
@@ -495,4 +518,11 @@
 		reg = <0x80>;
 		label = "LN9310";
 	};
+
+	lis2dw12_emul: lis2dw12@19 {
+		compatible = "cros,lis2dw12-emul";
+		status = "okay";
+		reg = <0x19>;
+		label = "LIS2DW12_EMUL";
+	};
 };