[v2 0/2] HID: i2c-hid: elan: Add ili2901 timing

[v2 0/2] HID: i2c-hid: elan: Add ili2901 timing

[xiazhengqiao]

ILI2901 requires reset to pull down time greater than 10ms,
so the configuration post_power_delay_ms is 10, and the chipset
initial time is required to be greater than 100ms,
so the post_gpio_reset_on_delay_ms is set to 100.

Change in v2:
- PATCH 1/2: Modify compatible properties values
- PATCH 2/2: No change
- Link to v1: https://lore.kernel.org/all/20231225092843.5993-3-xiazhengqiao@huaqin.corp-partner.google.com/

xiazhengqiao (2):
  dt-bindings: HID: i2c-hid: elan: Introduce bindings for Ilitek ili2901
  HID: i2c-hid: elan: Add ili2901 timing

 .../devicetree/bindings/input/elan,ekth6915.yaml          | 5 +++--
 drivers/hid/i2c-hid/i2c-hid-of-elan.c                     | 8 ++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

-- 
2.17.1

[v2 1/2] dt-bindings: HID: i2c-hid: elan: Introduce bindings for Ilitek ili2901

[xiazhengqiao]

Because ilitek, ili2901 needs to use reset to pull down the time for 10ms,
so we need to control the reset, use this drive control.

Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
---
 Documentation/devicetree/bindings/input/elan,ekth6915.yaml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
index 3e2d216c6432..dc4ac41f2441 100644
--- a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
+++ b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml
@@ -18,8 +18,9 @@ allOf:
 
 properties:
   compatible:
-    items:
-      - const: elan,ekth6915
+    enum:
+      - elan,ekth6915
+      - ilitek,ili2901
 
   reg:
     const: 0x10
-- 
2.17.1

Re: [v2 1/2] dt-bindings: HID: i2c-hid: elan: Introduce bindings for Ilitek ili2901

[Krzysztof Kozlowski]

On 26/12/2023 03:37, xiazhengqiao wrote:
> Because ilitek, ili2901 needs to use reset to pull down the time for 10ms,
> so we need to control the reset, use this drive control.

I don't see relation between commit msg and the patch itself. Perhaps
you wanted to say you document new device which is different than elan one?


Please use standard email subjects, so with the PATCH keyword in the
title. `git format-patch` helps here to create proper versioned patches.
Another useful tool is b4. Skipping the PATCH keyword makes filtering of
emails more difficult thus making the review process less convenient.

A nit, subject: drop second/last, redundant "bindings for". The
"dt-bindings" prefix is already stating that these are bindings.

> 
> Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>

Your name still does not look like in other reply.

> ---
>  Documentation/devicetree/bindings/input/elan,ekth6915.yaml | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 


What supplies does the device have? Not the driver, the device as
written in datasheet?

Best regards,
Krzysztof

Re: [v2 1/2] dt-bindings: HID: i2c-hid: elan: Introduce bindings for Ilitek ili2901

[Zhengqiao Xia]

Hi Krzysztof，

Thanks for your patient reply.

On Tue, Dec 26, 2023 at 5:09 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 26/12/2023 03:37, xiazhengqiao wrote:
> > Because ilitek, ili2901 needs to use reset to pull down the time for 10ms,
> > so we need to control the reset, use this drive control.
>
> I don't see relation between commit msg and the patch itself. Perhaps
> you wanted to say you document new device which is different than elan one?
>

Yes, I added a new touch, its timing is a little different from "elan,
ekth6915", and other control logic is similar.
I will re-commit my message.

>
> Please use standard email subjects, so with the PATCH keyword in the
> title. `git format-patch` helps here to create proper versioned patches.
> Another useful tool is b4. Skipping the PATCH keyword makes filtering of
> emails more difficult thus making the review process less convenient.
>
> A nit, subject: drop second/last, redundant "bindings for". The
> "dt-bindings" prefix is already stating that these are bindings.
>

Thanks for your guidance, I will modify it.

> >
> > Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
>
> Your name still does not look like in other reply.

Do you mean there is something wrong with my name? How about changing
it to the following:
Signed-off-by: Zhengqiao Xia  <xiazhengqiao@huaqin.corp-partner.google.com>

>
> > ---
> >  Documentation/devicetree/bindings/input/elan,ekth6915.yaml | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
>
>
> What supplies does the device have? Not the driver, the device as
> written in datasheet?

This device only has a 3.3V power supply, I call it "vcc33".

>
> Best regards,
> Krzysztof
>

Best regards,
Zhengqiao

[v2 2/2] HID: i2c-hid: elan: Add ili2901 timing

[xiazhengqiao]

ILI2901 requires reset to pull down time greater than 10ms,
so the configuration post_power_delay_ms is 10, and the chipset
initial time is required to be greater than 100ms,
so the post_gpio_reset_on_delay_ms is set to 100.

Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
---
 drivers/hid/i2c-hid/i2c-hid-of-elan.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
index 31abab57ad44..5b91fb106cfc 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of-elan.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
@@ -130,9 +130,17 @@ static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data = {
 	.main_supply_name = NULL,
 };
 
+static const struct elan_i2c_hid_chip_data ilitek_ili2901_chip_data = {
+	.post_power_delay_ms = 10,
+	.post_gpio_reset_on_delay_ms = 100,
+	.hid_descriptor_address = 0x0001,
+	.main_supply_name = "vcc33",
+};
+
 static const struct of_device_id elan_i2c_hid_of_match[] = {
 	{ .compatible = "elan,ekth6915", .data = &elan_ekth6915_chip_data },
 	{ .compatible = "ilitek,ili9882t", .data = &ilitek_ili9882t_chip_data },
+	{ .compatible = "ilitek,ili2901", .data = &ilitek_ili2901_chip_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, elan_i2c_hid_of_match);
-- 
2.17.1