[PATCH V2 0/2] HID: touchscreen: add himax hid-over-spi driver

[Tylor Yang]

Hello,

This patch series adds the driver for Himax HID-over-SPI touchscreen ICs.
This driver takes a position in [1], it intends to take advantage of SPI
transfer speed and HID interface. The userspace program [2] can use ioctl
through general hidraw interface provided by kernel HID sub-system to
control touch IC without creating special file nodes.

Patch 1 adds the Maintainer and devicetree bindings document for driver.

Patch 2 adds the driver itself, Kconfig and Makefiles.

[1] Overview:
+--------------------------------+
| himax hid-over-spi TPIC driver |
+--------------------------------+
| +-----------+  +-----------+   |      +-----------+  +-----------+
| | Device #1 |  | Device #i |   |      | Device #j |  | Device #k |
| +-----------+  +-----------+   |      +-----------+  +-----------+
|          \\      //            |               \\      //
|        +------------+          |             +------------+
|        | I/O Driver |          |             | I/O Driver |
|        +------------+          |             +------------+
|              ||                |                   ||
|     +------------------+       |          +------------------+
|     | Transport Driver |       |          | Transport Driver |
|     +------------------+       |          +------------------+
|                      \___      |         ___/
+--------------------------------+       /
                            \           /
                          +----------------+
                          |    HID Core    |
                          +----------------+
                           /  |        |  \
                          /   |        |   \
             ____________/    |        |    \_________________
            /                 |        |                      \
           /                  |        |                       \
 +----------------+  +-----------+  +------------------+  +------------------+
 | Generic Driver |  | MT Driver |  | Custom Driver #1 |  | Custom Driver #2 |
 +----------------+  +-----------+  +------------------+  +------------------+

[2] https://github.com/HimaxSoftware/hx_hid_util/tree/hid_func

version 2 changes
-rename bindings name from himax,hid-over-hx-spi to himax,hid-over-spi
-remove "himax,fw_size", "himax,heatmap_16bits", "himax,fw_in_flash", "himax,pid"
 and "himax,boot_time_fw_upgrade" items from dt-bindings and related code
-add "himax,id-gpios" for user to specify hardware id pins
-rename "himax,ic_det_delay" to "himax,ic-det-delay-ms" and
 "himax,ic_resume_delay" to "himax,ic-resume-delay-ms"
-MAINTAINER position adjust: move info to the position by letter order
-Kconfig add HX_HID_HAS_FLASH option to replace "himax,fw_in_flash"
-HIMAX_DRIVER_VER upadte from 0.0.10 to 0.0.11
-remove unused includes and description in hx_hid.c
-add code to map id-gpios value to PID
-correct variable naming style and misspellings in hx_ic_core.c/h
-remove unnecessary global varaible debug_flag

Tylor Yang (2):
  dt-bindings: input: Introduce Himax HID-over-SPI device
  HID: touchscreen: Add initial support for Himax HID-over-SPI

 .../bindings/input/himax,hid-over-spi.yaml    |  109 +
 MAINTAINERS                                   |    7 +
 drivers/hid/Kconfig                           |    2 +
 drivers/hid/Makefile                          |    2 +
 drivers/hid/hx-hid/Kconfig                    |   55 +
 drivers/hid/hx-hid/Makefile                   |   35 +
 drivers/hid/hx-hid/hx_acpi.c                  |   96 +
 drivers/hid/hx-hid/hx_core.c                  | 1626 ++++++++
 drivers/hid/hx-hid/hx_core.h                  |  487 +++
 drivers/hid/hx-hid/hx_hid.c                   |  757 ++++
 drivers/hid/hx-hid/hx_hid.h                   |   96 +
 drivers/hid/hx-hid/hx_ic_83102j.c             |  345 ++
 drivers/hid/hx-hid/hx_ic_83102j.h             |   42 +
 drivers/hid/hx-hid/hx_ic_core.c               | 3260 +++++++++++++++++
 drivers/hid/hx-hid/hx_ic_core.h               |  792 ++++
 drivers/hid/hx-hid/hx_inspect.c               |  652 ++++
 drivers/hid/hx-hid/hx_inspect.h               |  104 +
 drivers/hid/hx-hid/hx_of.c                    |  171 +
 drivers/hid/hx-hid/hx_plat.c                  |  480 +++
 drivers/hid/hx-hid/hx_plat.h                  |   30 +
 20 files changed, 9148 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/himax,hid-over-spi.yaml
 create mode 100644 drivers/hid/hx-hid/Kconfig
 create mode 100644 drivers/hid/hx-hid/Makefile
 create mode 100644 drivers/hid/hx-hid/hx_acpi.c
 create mode 100644 drivers/hid/hx-hid/hx_core.c
 create mode 100644 drivers/hid/hx-hid/hx_core.h
 create mode 100644 drivers/hid/hx-hid/hx_hid.c
 create mode 100644 drivers/hid/hx-hid/hx_hid.h
 create mode 100644 drivers/hid/hx-hid/hx_ic_83102j.c
 create mode 100644 drivers/hid/hx-hid/hx_ic_83102j.h
 create mode 100644 drivers/hid/hx-hid/hx_ic_core.c
 create mode 100644 drivers/hid/hx-hid/hx_ic_core.h
 create mode 100644 drivers/hid/hx-hid/hx_inspect.c
 create mode 100644 drivers/hid/hx-hid/hx_inspect.h
 create mode 100644 drivers/hid/hx-hid/hx_of.c
 create mode 100644 drivers/hid/hx-hid/hx_plat.c
 create mode 100644 drivers/hid/hx-hid/hx_plat.h

-- 
2.25.1