Add bindings for Ilitek. The ili9882t touch screen chip same as
Elan eKTH6915 controller has a reset gpio. The difference is that
ilitek9882 needs to use vccio-supply instead of vcc33-supply. 
From Dmitry suggestion, it would make more sense to distinguish the
binging of ili9882 and eKTH6915.

From The datasheet specifies there should be 60ms between touch SDA
sleep and panel RESX. so we can add the 65 ms delay in i2c_hid_core_suspend.


Changes in v4:
- PATCH 1/2: Remove compatible items and add reset maxItems.
- PATCH 1/2: Refer to the panel description in Doug serias[1].
  [1] https://lore.kernel.org/all/20230607144931.v2.1.Id68e30343bb1e11470582a9078b086176cfec46b@changeid/ 
- PATCH 2/2: Set a "null" to ili9882t_chip_data for vcc33-supply, then using dummy regulator.
- Link to v3: https://lore.kernel.org/all/20230607133458.4075667-1-yangcong5@huaqin.corp-partner.google.com/

Changes in v3:
- PATCH 1/2: Introduce bindings for Ilitek.
- Link to v2: https://lore.kernel.org/all/20230605060524.1178164-1-yangcong5@huaqin.corp-partner.google.com/

Changes in v2:
- PATCH 1/2: fix ran make dt_binding_check warnings/errors.
- PATCH 1/2: remove oneOf,just enum.
- Link to v1: https://lore.kernel.org/all/20230602140948.2138668-1-yangcong5@huaqin.corp-partner.google.com/

Cong Yang (2):
  dt-bindings: HID: i2c-hid: ilitek: Introduce bindings for Ilitek
    ili9882t
  HID: i2c-hid: elan: Add ili9882t timing

 .../bindings/input/ilitek,ili9882t.yaml       | 66 +++++++++++++++++++
 drivers/hid/i2c-hid/i2c-hid-of-elan.c         | 33 ++++++++--
 2 files changed, 92 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml

-- 
2.25.1