zephyr: DT: support sensor driver data

This has basic support to create instances of sensor-specific
driver data using the information from device tree.

BUG=b:173507858
BRANCH=none
TEST=make buildall -j8
build volteer on zephyr

Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.corp-partner.google.com>
Change-Id: I196d7595e8bd880e2314290660f08274ad99e172
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2778815
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/zephyr/dts/bindings/motionsense/drvdata/cros-ec,accelgyro-als-drv-data.yaml b/zephyr/dts/bindings/motionsense/drvdata/cros-ec,accelgyro-als-drv-data.yaml
new file mode 100644
index 0000000000..7d64689cf2
--- /dev/null
+++ b/zephyr/dts/bindings/motionsense/drvdata/cros-ec,accelgyro-als-drv-data.yaml
@@ -0,0 +1,44 @@
+# 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: ALS driver data
+
+compatible: "cros-ec,accelgyro-als-drv-data"
+
+child-binding:
+  description: ALS calibration data
+  properties:
+    scale:
+      type: int
+      required: true
+      description: |
+        Scale, uscale, and offset are used to correct the raw 16 bit ALS data
+        and then to convert it to 32 bit using the following equations
+        raw_value += offset;\n
+        adjusted_value = raw_value * scale + raw_value * uscale / 10000;
+    uscale:
+      type: int
+      required: true
+      description: uscale
+    offset:
+      type: int
+      required: true
+      description: offset
+
+#
+# examples:
+# als-drv-data {
+#        compatible = "cros-ec,accelgyro-als-drv-data";
+#        als-cal {
+#                scale = <1>;
+#                uscale = <0>;
+#                offset = <0>;
+#                als-channel-scale {
+#                compatible = "cros-ec,accelgyro-als-channel-scale";
+#                        k-channel-scale = <1>;
+#                        cover-scale = <1>;
+#                };
+#        };
+# };
+#