Re: [PATCH 2/2] input: goodix: Add device tree support for 5-finger chips

On Wed, 04 Mar 2015 10:19:08 +0100
Bastien Nocera [off-list ref] wrote:

On Wed, 2015-03-04 at 11:34 +0300, Aleksei Mamlin wrote:

quoted

This patch adds device tree support for 5-finger chips, like GT911 
and GT912.

You should add the same support to the ACPI matching.

Hi Bastien,

I never seen ACPI ids for GT911 or GT912. It seems they are used only on Andriod tablets.

<snip>

quoted

 #ifdef CONFIG_OF
 static struct of_device_id goodix_of_match[] = {
-       { .compatible = "goodix,gt9110" },
-       { .compatible = "goodix,gt927" },
-       { .compatible = "goodix,gt9271" },
-       { .compatible = "goodix,gt928" },
-       { .compatible = "goodix,gt967" },
+       { .compatible = "goodix,gt911",  .data = (void *) 5 },
+       { .compatible = "goodix,gt9110", .data = (void *) 10 },

There's no need to add "10" for these tablets as it's already the 
GOODIX_MAX_CONTACTS value. Or you need to add it to every instance.

Antonio Ospite showed me another way to set the max number of touch points.

I would also like a link to the spec sheets in the commit message.

quoted

+       { .compatible = "goodix,gt912",  .data = (void *) 5 },
+       { .compatible = "goodix,gt927",  .data = (void *) 10 },
+       { .compatible = "goodix,gt9271", .data = (void *) 10 },
+       { .compatible = "goodix,gt928",  .data = (void *) 10 },
+       { .compatible = "goodix,gt967",  .data = (void *) 10 },
        { }
 };
 MODULE_DEVICE_TABLE(of, goodix_of_match);

-- 
Thanks and regards,
Aleksei Mamlin
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