Re: [PATCH 5/5] Input: Add ChromeOS EC keyboard driver

Use the key-matrix layer to interpret key scan information from the EC
and inject input based on the FDT-supplied key map. This driver registers
itself with the ChromeOS EC driver to perform communications.

Additional FDT bindings are provided to specify rows/columns and the
auto-repeat information.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Luigi Semenzato <redacted>
Signed-off-by: Vincent Palatin <redacted>
---
 .../devicetree/bindings/input/cros-ec-keyb.txt     |   77 ++++
 drivers/input/keyboard/Kconfig                     |   10 +
 drivers/input/keyboard/Makefile                    |    1 +
 drivers/input/keyboard/cros_ec_keyb.c              |  413 ++++++++++++++++++++
 4 files changed, 501 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/input/cros-ec-keyb.txt
 create mode 100644 drivers/input/keyboard/cros_ec_keyb.c

diff --git a/Documentation/devicetree/bindings/input/cros-ec-keyb.txt b/Documentation/devicetree/bindings/input/cros-ec-keyb.txt
new file mode 100644
index 0000000..67f51d8
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/cros-ec-keyb.txt

@@ -0,0 +1,77 @@
+ChromeOS EC Keyboard
+
+Google's ChromeOS EC Keyboard is a simple matrix keyboard implemented on
+a separate EC (Embedded Controller) device. It provides a message for reading
+key scans from the EC. These are then converted into keycodes for processing
+by the kernel.
+
+Required properties:
+- compatible: "google,cros-ec-keyb"
+- google,key-rows: Number of keyboard rows (must be <= 8)
+- google,key-columns: Number of keyboard columns (must be <= 13)
+- google,repeat-delay-ms: Key repeat delay in milliseconds
+- google,repeat-rate-ms: Key repeat rate in milliseconds