From patchwork Thu Jun 8 13:01:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cong yang X-Patchwork-Id: 690683 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 5531BC7EE43 for ; Thu, 8 Jun 2023 13:02:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236637AbjFHNCR (ORCPT ); Thu, 8 Jun 2023 09:02:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236624AbjFHNCO (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 8420D198B for ; Thu, 8 Jun 2023 06:02:10 -0700 (PDT) Received: by mail-pf1-x430.google.com with SMTP id d2e1a72fcca58-652dd220d67so482358b3a.3 for ; Thu, 08 Jun 2023 06:02:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=huaqin-corp-partner-google-com.20221208.gappssmtp.com; s=20221208; t=1686229330; x=1688821330; 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=rr7qFKla7ah6JbnEELuOA7uWn8ojmtA0e2WLzBHM1Do=; b=SyBSCPHikj8dMbiuAtY5QTeMPExmSxmHARZuvnR3p3D9EP+kTpT5fGCB0WrXgYrSr1 iwGCJsfBkp/X4JCYrA5YBl38hoigm2BTjdcl4Dj7pjhAlJJ/UrT+sqXz9CxXreY5oyvv priIRTGQ739eTZAwzxa1kd/t1ouWI9fBCem75lJd85hmQluOFevbWa+U+H/68wcse0wC y5Bj+rxP8QCn3aNUw55v/9wmLLiBbKdq32Tf0jnQyEU/l+XgFMxm2tVzMWNIAqYpH4U+ zegFgq77c7qGukiMxQQcwNKLLHm9aVNTE3pIEc+nlV7WC6X2JbR4PBJK539gKxQ9DUO5 lPQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686229330; x=1688821330; 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=rr7qFKla7ah6JbnEELuOA7uWn8ojmtA0e2WLzBHM1Do=; b=JBo2O6s+euZdCjtIGNZqc/rOo/wCra96ERB9NBrx+ETZ/uECtTTr/CCbobM9TAn1AK Fv42yfIOITcWOBtZkvKy6yZI9519XKQfkpPuev9f5V6OqHblwWAvw5wg9w/uzi5oEfr2 mw4TdwbyA80oc16kEty9s/mu4x9f2dyTypKb0kUDnwbkWugjAtSdXkbo9f1XI/h6tN95 pFJAuUxEO6jArVOM0BoHqCYYtxRJovXsh9fault6+JlkI9r16tb0R+AmkyMHJGZfx7VS Ebbr3QoJI0onwtOnrdHANQfFalR4pG9qkNKaP8ZEhmg/+k3vYcG4tZzpOYhBQ7/KONx+ aKyQ== X-Gm-Message-State: AC+VfDxTP3xmv4jeGG4VfzPicJd8Z9iBSZMZnuQqrXpi7Uv/09Stbs42 wqe6RTWRi1Llgo8hDYX1TxZJ2w== X-Google-Smtp-Source: ACHHUZ69hMnJYjVL4lhiAv1kB3A2hivI5Bf8vWLWCsJPoBF0ymRcowxCGaxUHg3tJs/AR7UX8baE8A== X-Received: by 2002:a05:6a00:2d09:b0:658:8eae:a8de with SMTP id fa9-20020a056a002d0900b006588eaea8demr10426297pfb.4.1686229329266; Thu, 08 Jun 2023 06:02:09 -0700 (PDT) Received: from yc.huaqin.com ([101.78.151.214]) by smtp.gmail.com with ESMTPSA id g12-20020a62e30c000000b0065438394fa4sm1111371pfh.90.2023.06.08.06.02.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); 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 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. 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.org 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/i2c-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" 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 { @@ -52,8 +54,8 @@ 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; } @@ -64,6 +66,9 @@ 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); } @@ -89,24 +94,38 @@ 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"); + ihid_elan->chip_data = device_get_match_data(&client->dev); + + 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); - ihid_elan->chip_data = device_get_match_data(&client->dev); - 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);