From nobody Mon Feb 9 01:34:29 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 665C8C7EE25 for ; Thu, 8 Jun 2023 13:02:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236231AbjFHNCP (ORCPT ); Thu, 8 Jun 2023 09:02:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236621AbjFHNCJ (ORCPT ); Thu, 8 Jun 2023 09:02:09 -0400 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 366E51988 for ; Thu, 8 Jun 2023 06:02:06 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-652d76be8c2so505867b3a.3 for ; Thu, 08 Jun 2023 06:02:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=huaqin-corp-partner-google-com.20221208.gappssmtp.com; s=20221208; t=1686229324; x=1688821324; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=dLnYYpnKAb6DRuTkEcq+JlSoqFxtus1qe8JMabvFzcM=; b=Mj3C+7HodgCtt44noWXsFwa1bKGjMM+5878lhVzZPahDrJu1MBH1tUrD4b7L50rF2G fgRqLFIzD0hUmHG2zXXoTsv7rveXDRwyKXxfNmLNWcfJScKb61XA6XEzs6rV/wcCCk5L 7ML3phRG+ILDRdKRif7QoJXBQHadgsA27jqw1a5aVJo0pFuWwD2Yf4+4pCl6FnmnYU4r +aESjEUar5GphnmEcJ4faDUrJf6yADdyNIIQeyqyUacgdjz3/yTJdtZcVThXvuMfmYCb lHdIigFkvmYTknq5G1JKwfm5jdEWrlHDj4zNwalKVBj4Ql5tedS75i3+11OpqKD32GrA +/eQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686229324; x=1688821324; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dLnYYpnKAb6DRuTkEcq+JlSoqFxtus1qe8JMabvFzcM=; b=DMXaTEGUKEsdutS2V+puoYh7OCKdKgoUqCRpNtaNWG9iPpVGD4sIKtjVxT0ReuNuUw Cs87/tl+gAz5rBb7vwnC1b13FijCPJWDG7AgXdIqgaPLlh4WXlAlKkfRHtfTIcfBydQw q81nPiiHg1fsA/9D3OffXcByUOkkV5CKiLzcYxVRQouRYPFk0l6xhNge6GJ9nEC0x8Mo TfCCVphdaSv/5vVRBqE3YFdUrczSxIbjZPIeC3/Og3cs26EMd1bUJ6YtKWuvlZCMSNWt XMWop8d71oCqX69ylOpPw1ztsjL+ZcpLcnLr/6x9ElvbBpr3Iyf0HGqf2ab2BYg8vV8G f51Q== X-Gm-Message-State: AC+VfDzsYbUQNh/ehFQRacOebbOvgUSbGKQF2LQJHTYzMT3PZwH56b0z Wg5ADdpJ/h2br0tOfTyaYnPqrg== X-Google-Smtp-Source: ACHHUZ5vv8OrMeONkN6YcPtWm6YaYpzfIaynLGPzL1FJQNor16BgxXj8+Oigum2FS5P/vYL/XXCf7Q== X-Received: by 2002:a05:6a00:a29:b0:655:89f1:2db8 with SMTP id p41-20020a056a000a2900b0065589f12db8mr10553464pfh.16.1686229322964; Thu, 08 Jun 2023 06:02:02 -0700 (PDT) Received: from yc.huaqin.com ([101.78.151.214]) by smtp.gmail.com with ESMTPSA id g12-20020a62e30c000000b0065438394fa4sm1111371pfh.90.2023.06.08.06.01.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jun 2023 06:02:02 -0700 (PDT) From: Cong Yang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, dmitry.torokhov@gmail.com, jikos@kernel.org, benjamin.tissoires@redhat.com, dianders@chromium.org, hsinyi@google.com Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cong Yang Subject: [PATCH v4 1/2] dt-bindings: HID: i2c-hid: ilitek: Introduce bindings for Ilitek ili9882t Date: Thu, 8 Jun 2023 21:01:46 +0800 Message-Id: <20230608130147.2835818-2-yangcong5@huaqin.corp-partner.google.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230608130147.2835818-1-yangcong5@huaqin.corp-partner.google.com> References: <20230608130147.2835818-1-yangcong5@huaqin.corp-partner.google.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The ili9882t touch screen chip same as Elan eKTH6915 controller has a reset gpio. The difference is that ili9882t needs to use vccio-supply instead of vcc33-supply. Doug's series[1] allows panels and touchscreens to power on/off together, let's add a phandle for this. [1]: https://lore.kernel.org/r/20230607215224.2067679-1-dianders@chromium.o= rg Signed-off-by: Cong Yang --- .../bindings/input/ilitek,ili9882t.yaml | 66 +++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/ilitek,ili9882t= .yaml diff --git a/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml b= /Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml new file mode 100644 index 000000000000..89584264d6a2 --- /dev/null +++ b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/ilitek,ili9882t.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Ilitek ili9882t touchscreen controller + +maintainers: + - Dmitry Torokhov + +description: + Supports the Ilitek ili9882t touchscreen controller. + This touchscreen controller uses the i2c-hid protocol with a reset GPIO. + +allOf: + - $ref: /schemas/input/touchscreen/touchscreen.yaml# + +properties: + compatible: + const: ilitek,ili9882t + + reg: + const: 0x41 + + interrupts: + maxItems: 1 + + panel: true + + reset-gpios: + maxItems: 1 + description: Reset GPIO. + + + vccio-supply: + description: The 1.8V supply to the touchscreen. + +required: + - compatible + - reg + - interrupts + - vccio-supply + +additionalProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + touchscreen: touchscreen@41 { + compatible =3D "ilitek,ili9882t"; + reg =3D <0x41>; + + interrupt-parent =3D <&pio>; + interrupts =3D <12 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios =3D <&pio 60 GPIO_ACTIVE_LOW>; + vccio-supply =3D <&mt6366_vio18_reg>; + }; + }; --=20 2.25.1 From nobody Mon Feb 9 01:34:29 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EB1FC7EE25 for ; Thu, 8 Jun 2023 13:02:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236647AbjFHNCX (ORCPT ); Thu, 8 Jun 2023 09:02:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236623AbjFHNCO (ORCPT ); Thu, 8 Jun 2023 09:02:14 -0400 Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 843451BCE for ; 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Thu, 08 Jun 2023 06:02:08 -0700 (PDT) From: Cong Yang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, dmitry.torokhov@gmail.com, jikos@kernel.org, benjamin.tissoires@redhat.com, dianders@chromium.org, hsinyi@google.com Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cong Yang Subject: [PATCH v4 2/2] HID: i2c-hid: elan: Add ili9882t timing Date: Thu, 8 Jun 2023 21:01:47 +0800 Message-Id: <20230608130147.2835818-3-yangcong5@huaqin.corp-partner.google.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230608130147.2835818-1-yangcong5@huaqin.corp-partner.google.com> References: <20230608130147.2835818-1-yangcong5@huaqin.corp-partner.google.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The ili9882t is a TDDI IC (Touch with Display Driver). The datasheet specifies there should be 60ms between touch SDA sleep and panel RESX. Doug's series[1] allows panels and touchscreens to power on/off together, so we can add the 65 ms delay in i2c_hid_core_suspend before panel_unprepare. Beacuse ilitek9882 touchscrgeen is a panel follower, and needs to use vccio-supply instead of vcc33-supply, so set it "null" to ili9882t_chip_data, then using dummy regulator. [1]: https://lore.kernel.org/r/20230607215224.2067679-1-dianders@chromium.o= rg Signed-off-by: Cong Yang --- drivers/hid/i2c-hid/i2c-hid-of-elan.c | 33 +++++++++++++++++++++------ 1 file changed, 26 insertions(+), 7 deletions(-) diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2= c-hid-of-elan.c index 76ddc8be1cbb..40e6b8ebe8d1 100644 --- a/drivers/hid/i2c-hid/i2c-hid-of-elan.c +++ b/drivers/hid/i2c-hid/i2c-hid-of-elan.c @@ -18,9 +18,11 @@ #include "i2c-hid.h" =20 struct elan_i2c_hid_chip_data { - unsigned int post_gpio_reset_delay_ms; + unsigned int post_gpio_reset_on_delay_ms; + unsigned int post_gpio_reset_off_delay_ms; unsigned int post_power_delay_ms; u16 hid_descriptor_address; + const char *main_supply_name; }; =20 struct i2c_hid_of_elan { @@ -52,8 +54,8 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops) msleep(ihid_elan->chip_data->post_power_delay_ms); =20 gpiod_set_value_cansleep(ihid_elan->reset_gpio, 0); - if (ihid_elan->chip_data->post_gpio_reset_delay_ms) - msleep(ihid_elan->chip_data->post_gpio_reset_delay_ms); + if (ihid_elan->chip_data->post_gpio_reset_on_delay_ms) + msleep(ihid_elan->chip_data->post_gpio_reset_on_delay_ms); =20 return 0; } @@ -64,6 +66,9 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *op= s) container_of(ops, struct i2c_hid_of_elan, ops); =20 gpiod_set_value_cansleep(ihid_elan->reset_gpio, 1); + if (ihid_elan->chip_data->post_gpio_reset_off_delay_ms) + msleep(ihid_elan->chip_data->post_gpio_reset_off_delay_ms); + regulator_disable(ihid_elan->vccio); regulator_disable(ihid_elan->vcc33); } @@ -89,24 +94,38 @@ static int i2c_hid_of_elan_probe(struct i2c_client *cli= ent) if (IS_ERR(ihid_elan->vccio)) return PTR_ERR(ihid_elan->vccio); =20 - ihid_elan->vcc33 =3D devm_regulator_get(&client->dev, "vcc33"); + ihid_elan->chip_data =3D device_get_match_data(&client->dev); + + ihid_elan->vcc33 =3D devm_regulator_get(&client->dev, ihid_elan->chip_dat= a->main_supply_name); if (IS_ERR(ihid_elan->vcc33)) return PTR_ERR(ihid_elan->vcc33); =20 - ihid_elan->chip_data =3D device_get_match_data(&client->dev); - return i2c_hid_core_probe(client, &ihid_elan->ops, ihid_elan->chip_data->hid_descriptor_address, 0); } =20 static const struct elan_i2c_hid_chip_data elan_ekth6915_chip_data =3D { .post_power_delay_ms =3D 1, - .post_gpio_reset_delay_ms =3D 300, + .post_gpio_reset_on_delay_ms =3D 300, + .hid_descriptor_address =3D 0x0001, + .main_supply_name =3D "vcc33", +}; + +static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data =3D { + .post_power_delay_ms =3D 1, + .post_gpio_reset_on_delay_ms =3D 200, + .post_gpio_reset_off_delay_ms =3D 65, .hid_descriptor_address =3D 0x0001, + /* this touchscreen is tightly integrated with the panel and assumes + * that the relevant power rails (other than the IO rail) have already + * been turned on by the panel driver because we're a panel follower. + */ + .main_supply_name =3D "null", }; =20 static const struct of_device_id elan_i2c_hid_of_match[] =3D { { .compatible =3D "elan,ekth6915", .data =3D &elan_ekth6915_chip_data }, + { .compatible =3D "ilitek,ili9882t", .data =3D &ilitek_ili9882t_chip_data= }, { } }; MODULE_DEVICE_TABLE(of, elan_i2c_hid_of_match); --=20 2.25.1