[PATCH v4 0/2] cover: arm64: dts: qcom: glymur-crd: Add touchscreen node for ft3d81

[PATCH v4 0/2] cover: arm64: dts: qcom: glymur-crd: Add touchscreen node for ft3d81

[Pradyot Kumar Nayak]

The touchscreen module on Glymur/Mahua CRDs is a ft3d81 chip which, while
hardware-compatible with the ft8112 (same I2C-HID protocol, same
power-on/reset sequencing), requires the reset-gpios line to be
explicitly wired up in the DT. Without it the reset line remains
permanently asserted after a suspend/resume cycle and all subsequent
I2C transactions fail with -ENXIO.

V2 incorrectly used the generic hid-over-i2c binding. V3
takes a cleaner approach: extend the chip-specific focaltech,ft8112
binding to cover the ft3d81 (they share the same driver) and switch
the glymur-crd node to that binding. This removes the dependency on
the hid-over-i2c properties (hid-descr-addr) and aligns the supply
property names (vcc33-supply / vccio-supply) with the binding schema.

V3 was not picked up; instead V1 was accidentally merged by the maintainer.
V4 corrects this by superseding the partial V1 fix, and moves the DT change
from glymur-crd.dts to glymur-crd.dtsi where the shared board nodes belong.

v1: https://lore.kernel.org/linux-arm-msm/20260522-arm64-dts-glymur-crd-add-reset-gpio-to-touchscreen-v1-1-c7653924acdc@oss.qualcomm.com/
Changes in v1:
  - Initial submission: add reset-gpios to touchscreen node in glymur-crd.dtsi

v2: https://lore.kernel.org/linux-arm-msm/20260523-arm64-dts-glymur-crd-add-reset-gpio-to-touchscreen-v2-0-5c333051e5bb@oss.qualcomm.com/
Changes in v2:
  - Add dt-bindings patch to document reset-gpios in hid-over-i2c schema
    (flagged by dtbs_check on v1)
  - No change to the DTS patch itself

v3: https://lore.kernel.org/linux-arm-msm/20260603-arm64-dts-glymur-crd-add-reset-gpio-to-v3-0-3453ef577bcf@oss.qualcomm.com/
Changes in v3:
  - Drop prerequisite-message-id; series is now self-contained
  - Patch 1 (new): add focaltech,ft3d81 to the focaltech,ft8112
    binding compatible enum
  - Patch 2: Added focaltech,ft3d81 DT support which is hardware-compatible with the ft8112

Changes in v4:
  - v1 was accidentally merged by the maintainer instead of v3; raising
    v4 to correct this
  - Move DT change from glymur-crd.dts to glymur-crd.dtsi as the
    touchscreen node belongs to the shared board DTSI

---
Pradyot Kumar Nayak (2):
      dt-bindings: input: focaltech,ft8112: Add focaltech,ft3d81 compatible
      arm64: dts: qcom: glymur-crd: Add FocalTech ft3d81 touchscreen support

 Documentation/devicetree/bindings/input/focaltech,ft8112.yaml | 9 +++++++--
 arch/arm64/boot/dts/qcom/glymur-crd.dtsi                      | 7 +++----
 2 files changed, 10 insertions(+), 6 deletions(-)
---
base-commit: 1a1757b76427f6201bfe0bf1bea9f7574f332a93
change-id: 20260717-add_focaltech_ft3d81_touchscreen_support-263409a84b78

Best regards,
-- 
Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>

[PATCH v4 1/2] dt-bindings: input: focaltech,ft8112: Add focaltech,ft3d81 compatible

[Pradyot Kumar Nayak]

The Focaltech ft3d81 is fully compatible with the ft8112 i.e.
it uses the same I2C-HID protocol and the same power-on/reset sequencing,
DT nodes for boards carrying an ft3d81,can therefore bind to the existing
ft8112 driver without any additional changes.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>
---
 Documentation/devicetree/bindings/input/focaltech,ft8112.yaml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml b/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml
index 197f30b14d45..5ffa1246aba1 100644
--- a/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml
+++ b/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml
@@ -18,8 +18,13 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - focaltech,ft8112
+    oneOf:
+      - items:
+          - enum:
+              - focaltech,ft3d81
+          - const: focaltech,ft8112
+      - enum:
+          - focaltech,ft8112
 
   reg:
     maxItems: 1

-- 
2.43.0

Re: [PATCH v4 1/2] dt-bindings: input: focaltech,ft8112: Add focaltech,ft3d81 compatible

[Dmitry Torokhov]

On Fri, Jul 17, 2026 at 05:28:34PM +0530, Pradyot Kumar Nayak wrote:
> The Focaltech ft3d81 is fully compatible with the ft8112 i.e.
> it uses the same I2C-HID protocol and the same power-on/reset sequencing,
> DT nodes for boards carrying an ft3d81,can therefore bind to the existing
> ft8112 driver without any additional changes.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>

Applied, thank you.

-- 
Dmitry

[PATCH v4 2/2] arm64: dts: qcom: glymur-crd: Add FocalTech ft3d81 touchscreen support

[Pradyot Kumar Nayak]

The touchscreen module on Glymur/Mahua CRDs is different from
the one used on Hamoa CRDs and requires the reset-gpios to be wired to
the device. Without this in place the reset line will remain
permanently asserted during resume leaving the device offline and causing
all I2C transactions to fail with -ENXIO.

i2c_hid_of 3-0038: failed to change power setting.
i2c_hid_of 3-0038: PM: dpm_run_callback():
i2c_hid_core_pm_resume [i2c_hid] returns -6
i2c_hid_of 3-0038: PM: failed to resume async: error -6

The touchscreen on Glymur/Mahua-CRD is a focaltech ft3d81,
which is hardware-compatible with the ft8112.
we have added the required change in DT.

Fixes: e6bf559f7eb9 ("arm64: dts: qcom: glymur-crd: Enable keyboard, trackpad and touchscreen")
Fixes: f64ef325f1d9 ("arm64: dts: glymur-crd: Add reset GPIO to touchscreen node")

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Pradyot Kumar Nayak <pradyot.nayak@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/glymur-crd.dtsi | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/glymur-crd.dtsi b/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
index b314c6dd423c..4ae8834b4110 100644
--- a/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
+++ b/arch/arm64/boot/dts/qcom/glymur-crd.dtsi
@@ -679,14 +679,13 @@ &i2c8 {
 	status = "okay";
 
 	touchscreen@38 {
-		compatible = "hid-over-i2c";
+		compatible = "focaltech,ft3d81", "focaltech,ft8112";
 		reg = <0x38>;
 
-		hid-descr-addr = <0x1>;
 		interrupts-extended = <&tlmm 51 IRQ_TYPE_LEVEL_LOW>;
 
-		vdd-supply = <&vreg_misc_3p3>;
-		vddl-supply = <&vreg_l15b_e0_1p8>;
+		vcc33-supply = <&vreg_misc_3p3>;
+		vccio-supply = <&vreg_l15b_e0_1p8>;
 
 		reset-gpios = <&tlmm 48 GPIO_ACTIVE_LOW>;
 

-- 
2.43.0