linux-kernel - [PATCH] HID: i2c-hid: goodix: Add ili9882t timing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 19 May 2023 17:01:49 +0800
From:   Cong Yang <yangcong5@...qin.corp-partner.google.com>
To:     jikos@...nel.org, benjamin.tissoires@...hat.com,
        dianders@...omium.org, mka@...omium.org, dmitry.torokhov@...il.com,
        hsinyi@...gle.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Cong Yang <yangcong5@...qin.corp-partner.google.com>
Subject: [PATCH] HID: i2c-hid: goodix: Add ili9882t timing

The ili9882t is a TDDI IC ((Touch with Display Driver)). It requires the
panel reset gpio to be high before i2c commands. Use a longer delay in
post_power_delay_ms to ensure the poweron sequence.

Signed-off-by: Cong Yang <yangcong5@...qin.corp-partner.google.com>
---
 drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
index 0060e3dcd775..c5870b683a26 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
@@ -101,8 +101,14 @@ static const struct goodix_i2c_hid_timing_data goodix_gt7375p_timing_data = {
 	.post_gpio_reset_delay_ms = 180,
 };
 
+static const struct goodix_i2c_hid_timing_data ilitek_ili9882t_timing_data = {
+	.post_power_delay_ms = 200,
+	.post_gpio_reset_delay_ms = 180,
+};
+
 static const struct of_device_id goodix_i2c_hid_of_match[] = {
 	{ .compatible = "goodix,gt7375p", .data = &goodix_gt7375p_timing_data },
+	{ .compatible = "ilitek,ili9882t", .data = &ilitek_ili9882t_timing_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, goodix_i2c_hid_of_match);
-- 
2.25.1