zephyr: Add Smart Battery emulator

Add Smart Battery emulator which is emulated device on i2c bus. Emulated
battery properties are defined through device tree, but they can be
changed in runtime through Smart Battery emulator API. It allows to set
custom handlers for write and read messages to emulate more complex
scenarios or malfunctioning device.

BUG=b:184855975
BRANCH=none
TEST=none

Signed-off-by: Tomasz Michalec <tm@semihalf.com>
Change-Id: Ia94a0a122123e3259882dfdc80d067c61c98379b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2903206
Reviewed-by: Jeremy Bettis <jbettis@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Commit-Queue: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

1 files changed, 155 insertions, 0 deletions

diff --git a/zephyr/dts/bindings/emul/zephyr,smart-battery.yaml b/zephyr/dts/bindings/emul/zephyr,smart-battery.yaml
new file mode 100644
index 0000000000..cc1d2f368d
--- /dev/null
+++ b/zephyr/dts/bindings/emul/zephyr,smart-battery.yaml
@@ -0,0 +1,155 @@
+# 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: Zephyr Smart Battery Emulator
+
+compatible: "zephyr,smart-battery"
+
+include: base.yaml
+
+properties:
+    mf-access:
+        type: int
+        required: false
+        default: 0
+        description: Word returned on manufacturer access command.
+
+    at-rate-full-mw-support:
+        type: boolean
+        description:
+          Flag indicating if AT_RATE_TIME_TO_FULL command supports mW capacity
+          mode.
+
+    version:
+        type: string
+        required: false
+        enum:
+          - BATTERY_SPEC_VER_1_0
+          - BATTERY_SPEC_VER_1_1
+          - BATTERY_SPEC_VER_1_1_WITH_PEC
+        default: BATTERY_SPEC_VER_1_1_WITH_PEC
+        description: Version of Smart Battery.
+
+    vscale:
+        type: int
+        required: false
+        default: 0
+        description: Scaling of voltage.
+
+    ipscale:
+        type: int
+        required: false
+        default: 0
+        description: Scaling of current.
+
+    int-charge-controller:
+        type: boolean
+        description: Flag indicating if internal charge controller is supported.
+
+    primary-battery:
+        type: boolean
+        description:
+          Flag indicating if primary battery role selection is supported.
+
+    design-mv:
+        type: int
+        required: false
+        default: 5000
+        description: Design battery voltage in mV.
+
+    design-cap:
+        type: int
+        required: false
+        default: 5000
+        description: Design battery capacity in mAh.
+
+    temperature:
+        type: int
+        required: false
+        default: 2930
+        description: Battery temperature in 0.1 Kelvins.
+
+    volt:
+        type: int
+        required: false
+        default: 5000
+        description: Battery voltage in mV.
+
+    cur:
+        type: int
+        required: false
+        default: 1000
+        description: Current charging (> 0) or discharging (< 0) battery in mA.
+
+    avg-cur:
+        type: int
+        required: false
+        default: 1000
+        description: Average current from 1 minute.
+
+    max-error:
+        type: int
+        required: false
+        default: 0
+        description: Maximum error of commands return value in percent.
+
+    cap:
+        type: int
+        required: false
+        default: 2000
+        description: Capacity of the battery in mAh.
+
+    full-cap:
+        type: int
+        required: false
+        default: 4000
+        description: Full capacity of the battery in mAh.
+
+    desired-charg-cur:
+        type: int
+        required: false
+        default: 2000
+        description: Charging current requested by battery.
+
+    desired-charg-volt:
+        type: int
+        required: false
+        default: 7000
+        description: Charging voltage requested by battery.
+
+    cycle-count:
+        type: int
+        required: false
+        default: 125
+        description: Number of cycles.
+
+    serial-number:
+        type: int
+        required: false
+        default: 7
+        description: Serial number of battery.
+
+    mf-name:
+        type: string
+        required: false
+        default: "zephyr"
+        description: Manufacturer name. Length has to be smaller than 32 bytes.
+
+    dev-name:
+        type: string
+        required: false
+        default: "smartbat"
+        description: Device name. Length has to be smaller than 32 bytes.
+
+    dev-chem:
+        type: string
+        required: false
+        default: "LION"
+        description: Device chemistry. Length has to be smaller than 32 bytes.
+
+    mf-data:
+        type: string
+        required: false
+        default: "LION"
+        description: Manufacturer data. Length has to be smaller than 32 bytes.