Zephyr: Add TMP112 device tree support

Add support to the device tree parsing and definition for the TMP112
i2c temperature sensors.

BRANCH=None
BUG=b:195137794
TEST=zmake testall

Signed-off-by: Diana Z <dzigterman@chromium.org>
Change-Id: I62d2c60962e4b831f3073c2037ca20db4f32bafa
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3340223
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>

3 files changed, 78 insertions, 1 deletions

diff --git a/zephyr/dts/bindings/temp/cros_ec_temp_sensor_tmp112.yaml b/zephyr/dts/bindings/temp/cros_ec_temp_sensor_tmp112.yaml
new file mode 100644
index 0000000000..0cf05f48a0
--- /dev/null
+++ b/zephyr/dts/bindings/temp/cros_ec_temp_sensor_tmp112.yaml
@@ -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.
+
+description: >
+  Properties for a TMP112 I2C temperature sensor
+
+include: cros_ec_temp_sensor.yaml
+
+compatible: cros-ec,temp-sensor-tmp112
+
+properties:
+    tmp112-name:
+      type: string
+      required: true
+      description:
+        Enum value to index into the TMP112 specific sensors
+      enum:
+      - TMP112_SOC
+      - TMP112_AMB
+
+    port:
+      required: true
+      type: phandle
+      description: phandle to the named i2c port
+
+    i2c-addr-flags:
+      required: true
+      type: string
+      description: I2C address of chip
+      enum:
+        - TMP112_I2C_ADDR_FLAGS0
+        - TMP112_I2C_ADDR_FLAGS1
+        - TMP112_I2C_ADDR_FLAGS2
+        - TMP112_I2C_ADDR_FLAGS3
diff --git a/zephyr/shim/include/temp_sensor/temp_sensor.h b/zephyr/shim/include/temp_sensor/temp_sensor.h
index b0cadd4303..ef68cc5aa9 100644
--- a/zephyr/shim/include/temp_sensor/temp_sensor.h
+++ b/zephyr/shim/include/temp_sensor/temp_sensor.h
@@ -23,6 +23,21 @@ enum temp_sensor_id {
 
 #undef TEMP_SENSOR_ID_WITH_COMMA
 
+/* TMP112 access array */
+#define ZSHIM_TMP112_SENSOR_ID(node_id) DT_STRING_UPPER_TOKEN(node_id, \
+							      tmp112_name)
+#define TMP112_SENSOR_ID_WITH_COMMA(node_id) ZSHIM_TMP112_SENSOR_ID(node_id),
+
+enum tmp112_sensor {
+#if DT_HAS_COMPAT_STATUS_OKAY(cros_ec_temp_sensor_tmp112)
+	DT_FOREACH_STATUS_OKAY(cros_ec_temp_sensor_tmp112,
+			       TMP112_SENSOR_ID_WITH_COMMA)
+#endif
+	TMP112_COUNT,
+};
+
+#undef TMP112_SENSOR_ID_WITH_COMMA
+
 #endif /* CONFIG_PLATFORM_EC_TEMP_SENSOR */
 
 #endif /* ZEPHYR_SHIM_INCLUDE_TEMP_SENSOR_TEMP_SENSOR_H_ */
diff --git a/zephyr/shim/src/temp_sensors.c b/zephyr/shim/src/temp_sensors.c
index 524270e35a..a8533202fa 100644
--- a/zephyr/shim/src/temp_sensors.c
+++ b/zephyr/shim/src/temp_sensors.c
@@ -3,10 +3,11 @@
  * found in the LICENSE file.
  */
 
+#include "adc.h"
 #include "temp_sensor.h"
 #include "temp_sensor/temp_sensor.h"
-#include "adc.h"
 #include "temp_sensor/thermistor.h"
+#include "temp_sensor/tmp112.h"
 
 #if DT_NODE_EXISTS(DT_PATH(named_temp_sensors))
 static int thermistor_get_temp(const struct temp_sensor_t *sensor,
@@ -46,7 +47,33 @@ static int thermistor_get_temp(const struct temp_sensor_t *sensor,
 
 DT_FOREACH_STATUS_OKAY(cros_ec_thermistor, DEFINE_THERMISTOR_DATA)
 
+#if DT_HAS_COMPAT_STATUS_OKAY(cros_ec_temp_sensor_tmp112)
+static int tmp112_get_temp(const struct temp_sensor_t *sensor, int *temp_ptr)
+{
+	return tmp112_get_val_k(sensor->idx, temp_ptr);
+}
+#endif /* cros_ec_temp_sensor_tmp112 */
+
+#define DEFINE_TMP112_DATA(node_id)                                         \
+	[ZSHIM_TMP112_SENSOR_ID(node_id)] = {                               \
+		.i2c_port = I2C_PORT(DT_PHANDLE(node_id, port)),            \
+		.i2c_addr_flags = DT_STRING_TOKEN(node_id, i2c_addr_flags), \
+	},
+
+#define TEMP_TMP112(node_id)                            \
+	[ZSHIM_TEMP_SENSOR_ID(node_id)] = {             \
+		.name = DT_LABEL(node_id),              \
+		.read = tmp112_get_temp,                \
+		.idx = ZSHIM_TMP112_SENSOR_ID(node_id), \
+		.type = TEMP_SENSOR_TYPE_BOARD,         \
+	},
+
+const struct tmp112_sensor_t tmp112_sensors[TMP112_COUNT] = {
+	DT_FOREACH_STATUS_OKAY(cros_ec_temp_sensor_tmp112, DEFINE_TMP112_DATA)
+};
+
 const struct temp_sensor_t temp_sensors[] = {
 	DT_FOREACH_STATUS_OKAY(cros_ec_temp_sensor_thermistor, TEMP_THERMISTOR)
+	DT_FOREACH_STATUS_OKAY(cros_ec_temp_sensor_tmp112, TEMP_TMP112)
 };
 #endif /* named_temp_sensors */