From patchwork Wed Aug 2 07:19:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cong yang X-Patchwork-Id: 709424 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 BD506C41513 for ; Wed, 2 Aug 2023 07:20:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232434AbjHBHUY (ORCPT ); Wed, 2 Aug 2023 03:20:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232764AbjHBHUR (ORCPT ); Wed, 2 Aug 2023 03:20:17 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8FED41FD6 for ; Wed, 2 Aug 2023 00:20:15 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-686f25d045cso4457877b3a.0 for ; Wed, 02 Aug 2023 00:20:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=huaqin-corp-partner-google-com.20221208.gappssmtp.com; s=20221208; t=1690960815; x=1691565615; 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=eJ5YLO0IIt+aIbJ11JJ3Kxjx5y5WL9E8nDB9fSOF3J4=; b=3DqIUdoDZtsnVT36Z++jOJ+maleHOtfrQIXS3qBH7UitgBTt6KgD5Jc99pCKGSWHci gyGtcilxvvzDK2xbCijB0BOp0D0Be+apt6qUUjw/vJtMz3Js5PnlF8SRe9bxT56N27+2 O06udsLWhywr52jJwokjky3t0VzSQyHuHM2m13+uvvNpR3LbAPsKG2VKZ0SsM1BRSSyD s/kkmVEdB29nl1G6KFfoQ6knPyGwDpIojYqh208Ni+dewpTxes8lSrjmNL1Q5cpj8e53 Jzw2/kHf45inKBmu5R5qLV9Ksxa0L3f2xr0AbwfJJHX4Gz8GWdLEJMBub8cTyVsQj5eq AFgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690960815; x=1691565615; 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=eJ5YLO0IIt+aIbJ11JJ3Kxjx5y5WL9E8nDB9fSOF3J4=; b=Ny6iEXHU+Efbwld8XwCgLLfJxA4ip0WA7I3zXB9gTnG9m7UiYdz1g95enaDalAI2C9 UH9NbXG7l+FRa9OWn5EVP76GdxdjyL9CApH8fGJRxcp/iwOe3KxHUNAVq8gs9fdc003B HdfjeJodT13kqOGQpqo2sOn7U07wFH+DxohZ8Mdd/vZg033HaFzA55w54At38hfdIymM q5Tq+t70f8fMAnvSii9nGSREa0V337BhoESE4XpUitg3egMgrE3UEndz7U33nW76u1pG kDf4Va/2AI87PzFyeOz2gbIn9mgYfOcjoLP1QY1YL7IyulTNoNDUsGb1db/JsziF/Pwb Uqsw== X-Gm-Message-State: ABy/qLYzmMiJsJZPMF2UtbRTvBsTsQd8mYV8BYMqN2OgmcOwDnCqqU3R B83o0t6Crvbp4Ubv7+wE1zMr8g== X-Google-Smtp-Source: APBJJlE7D+YzaMMSTrnCX09X4zmAYfYhotDDIscNtvS9jL5G3mAL5vIMIJYEF1jvFGViH7uoKbB9iw== X-Received: by 2002:a05:6a00:1590:b0:687:4bd8:159a with SMTP id u16-20020a056a00159000b006874bd8159amr6479581pfk.19.1690960814911; Wed, 02 Aug 2023 00:20:14 -0700 (PDT) Received: from yc.huaqin.com ([101.78.151.205]) by smtp.gmail.com with ESMTPSA id fe12-20020a056a002f0c00b00684ca1b45b9sm10732543pfb.149.2023.08.02.00.20.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Aug 2023 00:20:14 -0700 (PDT) From: Cong Yang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, dmitry.torokhov@gmail.com, dianders@google.com, jikos@kernel.org, benjamin.tissoires@redhat.com, hsinyi@google.com Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cong Yang , Krzysztof Kozlowski Subject: [PATCH v6 1/2] dt-bindings: input: i2c-hid: Introduce Ilitek ili9882t Date: Wed, 2 Aug 2023 15:19:46 +0800 Message-Id: <20230802071947.1683318-2-yangcong5@huaqin.corp-partner.google.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230802071947.1683318-1-yangcong5@huaqin.corp-partner.google.com> References: <20230802071947.1683318-1-yangcong5@huaqin.corp-partner.google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 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.org Reviewed-by: Krzysztof Kozlowski Signed-off-by: Cong Yang --- .../bindings/input/ilitek,ili9882t.yaml | 67 +++++++++++++++++++ 1 file changed, 67 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..c5d9e0e919f9 --- /dev/null +++ b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml @@ -0,0 +1,67 @@ +# 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: + - Cong Yang + +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 + - panel + - vccio-supply + +additionalProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + touchscreen: touchscreen@41 { + compatible = "ilitek,ili9882t"; + reg = <0x41>; + + interrupt-parent = <&pio>; + interrupts = <12 IRQ_TYPE_LEVEL_LOW>; + + panel = <&panel>; + reset-gpios = <&pio 60 GPIO_ACTIVE_LOW>; + vccio-supply = <&mt6366_vio18_reg>; + }; + }; From patchwork Wed Aug 2 07:19:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cong yang X-Patchwork-Id: 710747 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 26AE4C3DA40 for ; Wed, 2 Aug 2023 07:20:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232731AbjHBHUa (ORCPT ); Wed, 2 Aug 2023 03:20:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232691AbjHBHUZ (ORCPT ); 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Wed, 02 Aug 2023 00:20:22 -0700 (PDT) From: Cong Yang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, dmitry.torokhov@gmail.com, dianders@google.com, jikos@kernel.org, benjamin.tissoires@redhat.com, hsinyi@google.com Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cong Yang , Douglas Anderson Subject: [PATCH v6 2/2] HID: i2c-hid: elan: Add ili9882t timing Date: Wed, 2 Aug 2023 15:19:47 +0800 Message-Id: <20230802071947.1683318-3-yangcong5@huaqin.corp-partner.google.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230802071947.1683318-1-yangcong5@huaqin.corp-partner.google.com> References: <20230802071947.1683318-1-yangcong5@huaqin.corp-partner.google.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org 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. Because ili9882t touchscrgeen is a panel follower, and needs to use vccio-supply instead of vcc33-supply, so set it NULL to ili9882t_chip_data, then not use vcc33 regulator. [1]: https://lore.kernel.org/all/20230727171750.633410-1-dianders@chromium.org Reviewed-by: Douglas Anderson Signed-off-by: Cong Yang Acked-By: Benjamin Tissoires --- drivers/hid/i2c-hid/i2c-hid-of-elan.c | 50 ++++++++++++++++++++------- 1 file changed, 38 insertions(+), 12 deletions(-) diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2c-hid-of-elan.c index 029045d9661c..31abab57ad44 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" 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; }; struct i2c_hid_of_elan { @@ -38,9 +40,11 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops) container_of(ops, struct i2c_hid_of_elan, ops); int ret; - ret = regulator_enable(ihid_elan->vcc33); - if (ret) - return ret; + if (ihid_elan->vcc33) { + ret = regulator_enable(ihid_elan->vcc33); + if (ret) + return ret; + } ret = regulator_enable(ihid_elan->vccio); if (ret) { @@ -52,8 +56,8 @@ static int elan_i2c_hid_power_up(struct i2chid_ops *ops) msleep(ihid_elan->chip_data->post_power_delay_ms); 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); return 0; } @@ -64,8 +68,12 @@ static void elan_i2c_hid_power_down(struct i2chid_ops *ops) container_of(ops, struct i2c_hid_of_elan, ops); 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); + if (ihid_elan->vcc33) + regulator_disable(ihid_elan->vcc33); } static int i2c_hid_of_elan_probe(struct i2c_client *client) @@ -89,24 +97,42 @@ static int i2c_hid_of_elan_probe(struct i2c_client *client) if (IS_ERR(ihid_elan->vccio)) return PTR_ERR(ihid_elan->vccio); - ihid_elan->vcc33 = devm_regulator_get(&client->dev, "vcc33"); - if (IS_ERR(ihid_elan->vcc33)) - return PTR_ERR(ihid_elan->vcc33); - ihid_elan->chip_data = device_get_match_data(&client->dev); + if (ihid_elan->chip_data->main_supply_name) { + ihid_elan->vcc33 = devm_regulator_get(&client->dev, + ihid_elan->chip_data->main_supply_name); + if (IS_ERR(ihid_elan->vcc33)) + return PTR_ERR(ihid_elan->vcc33); + } + return i2c_hid_core_probe(client, &ihid_elan->ops, ihid_elan->chip_data->hid_descriptor_address, 0); } static const struct elan_i2c_hid_chip_data elan_ekth6915_chip_data = { .post_power_delay_ms = 1, - .post_gpio_reset_delay_ms = 300, + .post_gpio_reset_on_delay_ms = 300, + .hid_descriptor_address = 0x0001, + .main_supply_name = "vcc33", +}; + +static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data = { + .post_power_delay_ms = 1, + .post_gpio_reset_on_delay_ms = 200, + .post_gpio_reset_off_delay_ms = 65, .hid_descriptor_address = 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 = NULL, }; 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 }, { } }; MODULE_DEVICE_TABLE(of, elan_i2c_hid_of_match);