linux-kernel - [PATCH v2 0/2] Add tc3408 bindings and timing

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Message-Id: <20250821031514.49497-1-yelangyan@huaqin.corp-partner.google.com>
Date: Thu, 21 Aug 2025 11:15:12 +0800
From: Langyan Ye <yelangyan@...qin.corp-partner.google.com>
To: dmitry.torokhov@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	jikos@...nel.org,
	bentiss@...nel.org
Cc: dianders@...omium.org,
	linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Langyan Ye <yelangyan@...qin.corp-partner.google.com>
Subject: [PATCH v2 0/2] Add tc3408 bindings and timing

The tc3408 touch screen chip same as Elan eKTH6915 controller
has a reset gpio. The difference is that they have different
post_power_delay_ms.

According to the Parade TC3408 datasheet, the reset pin requires a
pull-down duration longer than 10 ms, therefore post_power_delay_ms
is set to 10. In addition, the chipset requires an initialization
time greater than 300 ms after reset, so post_gpio_reset_on_delay_ms
is configured as 300.

Changes in v3:
- PATCH 2/2: Corrected post_gpio_reset_on_delay_ms: 100 -> 300
- PATCH 2/2: Dropped Reviewed-by tag from Douglas Anderson since code changed
- Link to v2: https://lore.kernel.org/all/20250820122520.3356738-1-yelangyan@huaqin.corp-partner.google.com/

Changes in v2:
- PATCH 1/2: Drop redundant "bindings for" from subject
- PATCH 1/2: Improve description (describe hardware instead of bindings)
- PATCH 1/2: Drop "panel: true" property
- PATCH 1/2: Drop redundant description for reset-gpios
- PATCH 1/2: Use unevaluatedProperties: false instead of additionalProperties
- Link to v1: https://lore.kernel.org/all/20250819034852.1230264-1-yelangyan@huaqin.corp-partner.google.com/

Langyan Ye (2):
  dt-bindings: input: Add Parade TC3408 touchscreen controller
  HID: i2c-hid: elan: Add parade-tc3408 timing

 .../bindings/input/parade,tc3408.yaml         | 68 +++++++++++++++++++
 drivers/hid/i2c-hid/i2c-hid-of-elan.c         |  8 +++
 2 files changed, 76 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/parade,tc3408.yaml

-- 
2.34.1