From patchwork Tue Nov 3 00:12:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 11875583 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3764892A for ; Tue, 3 Nov 2020 00:13:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 10DDE2231B for ; Tue, 3 Nov 2020 00:13:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="jY5Q8Jcl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726778AbgKCANG (ORCPT ); Mon, 2 Nov 2020 19:13:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726492AbgKCANG (ORCPT ); Mon, 2 Nov 2020 19:13:06 -0500 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C959C061A48 for ; Mon, 2 Nov 2020 16:13:06 -0800 (PST) Received: by mail-pf1-x444.google.com with SMTP id j18so12659702pfa.0 for ; Mon, 02 Nov 2020 16:13:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ul60m8IIifIpsjtzly1RX3b0Mhagmr0FW1v0DBlxPWM=; b=jY5Q8JclUFiAoBChIhkGBbS90jE7o3/dAeA4p/e4qn6P8SsrmXG0w4skVppW/BQhvv khKSjL5cxTk2wXIFMFwT8yUv1FGUiFUx/Q+4ju+c0Lo+4AtlPvaABFgeW7ad3CMb6zue 1jtGTjxHgxkCEG1rPtWPqErqxD9TbxvNGbA9g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Ul60m8IIifIpsjtzly1RX3b0Mhagmr0FW1v0DBlxPWM=; b=KMTvIckGriCZU4o/SBJKSe7pjgP6ti087p8gIS9DRbnXHWm+XsdUvvhb4HBIPvkGPt Wa2IYpwuvAwOimzShkpLvzLszN8k8EB8xAP9k3cUPWPIGMHDI11Pz990TAon6bhFxR12 tY6d8Id4bG3JB7MSxLQG7shknDbjOpQLp9CqiO58ifpx7+5MmYrtNqA5FDEg2iUUF4qA UhgG22d7gT5s0hU2adMAkqSvMBG7nqiiZyvfyg6JbrThHb5U9mLPz76OPc4D7O9uRjOH ZzsiztSqRVIzRMAM/RhRfTm+IniHV8CTBf7prMAVnk+QcvqI9ntC2gQh0jdG2/joI+hd /tgw== X-Gm-Message-State: AOAM532W/5kT91AYA99fq7cVmkMJIdc95UyexGAB8lrM1nSmW277//26 oxKhlK+EwGkrs7qkSMWFEbSY0g== X-Google-Smtp-Source: ABdhPJxkQVlo9EYqQ/2jCNcyo/uISGLN7g69m9FLLkoR3y97vih5lpL8suUZi0POIuEfbRffv3skrw== X-Received: by 2002:a63:4707:: with SMTP id u7mr14396862pga.358.1604362385897; Mon, 02 Nov 2020 16:13:05 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:42b0:34ff:fe3d:58e6]) by smtp.gmail.com with ESMTPSA id v16sm13244295pgk.26.2020.11.02.16.13.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2020 16:13:05 -0800 (PST) From: Douglas Anderson To: jkosina@suse.cz, benjamin.tissoires@redhat.com, gregkh@linuxfoundation.org, Dmitry Torokhov Cc: linux-input@vger.kernel.org, hdegoede@redhat.com, swboyd@chromium.org, kai.heng.feng@canonical.com, robh+dt@kernel.org, andrea@borgia.bo.it, Douglas Anderson , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/3] dt-bindings: HID: i2c-hid: Introduce bindings for the Goodix GT7375P Date: Mon, 2 Nov 2020 16:12:39 -0800 Message-Id: <20201102161210.v3.1.Ibb28033c81d87fcc13a6ba28c6ea7ac154d65f93@changeid> X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This adds new bindings for the Goodix GT7375P touchscreen. While this touchscreen's communications are based on the generic "i2c-over-hid" protocol, it needs special power sequencing and thus gets its own compatible and bindings. Signed-off-by: Douglas Anderson --- Changes in v3: - Removed Benjamin as a maintainer. - Fixed compatible in example. - Updated description. Changes in v2: - ("dt-bindings: HID: i2c-hid: Introduce bindings for the Goodix GT7375P") new in v2. .../bindings/input/goodix,gt7375p.yaml | 63 +++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7375p.yaml diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml new file mode 100644 index 000000000000..15a38516e594 --- /dev/null +++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml @@ -0,0 +1,63 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/goodix,gt7375p.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Goodix GT7375P touchscreen + +maintainers: + - Douglas Anderson + +description: + Supports the Goodix GT7375P touchscreen. + +properties: + compatible: + items: + - const: goodix,gt7375p + + reg: + enum: + - 0x5d + - 0x14 + + interrupts: + maxItems: 1 + + reset-gpios: + true + + vdd-supply: + description: The 3.3V supply to the touchscreen. + +required: + - compatible + - reg + - interrupts + - reset-gpios + - vdd-supply + +additionalProperties: false + +examples: + - | + #include + #include + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + ap_ts: touchscreen@5d { + compatible = "goodix,gt7375p"; + reg = <0x5d>; + + interrupt-parent = <&tlmm>; + interrupts = <9 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>; + vdd-supply = <&pp3300_ts>; + }; + }; From patchwork Tue Nov 3 00:12:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 11875587 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 66CC5697 for ; Tue, 3 Nov 2020 00:13:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 43D72222BA for ; Tue, 3 Nov 2020 00:13:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="agVBUbm3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727122AbgKCANJ (ORCPT ); Mon, 2 Nov 2020 19:13:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725940AbgKCANI (ORCPT ); Mon, 2 Nov 2020 19:13:08 -0500 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64753C0617A6 for ; Mon, 2 Nov 2020 16:13:08 -0800 (PST) Received: by mail-pg1-x544.google.com with SMTP id g12so12229595pgm.8 for ; Mon, 02 Nov 2020 16:13:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=hsUR+IJfVilqvnHIzzYdaBtqA1fDgSipkH/UXQ1BFKs=; b=agVBUbm3+3pjD+GZcDiZO5GujBuzjLwBCryM5LYevPYck5UpPlOZqOKL1sQWhe/FhF KsVmsThU+206GzoOZevjmoEmtIe6XIQ1nKmMCruL9FgpMR+/2KuOYNRfjOhPoMAIr/Ah oM08BzHV8XeTNqmO9zxAJqLeC5zK++Scv/ijo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=hsUR+IJfVilqvnHIzzYdaBtqA1fDgSipkH/UXQ1BFKs=; b=FBMjV3erLEIfTj1TDPP/lR//+pOBgN8pS78biBe3dGkIel6bV+/h57qliLJFOgjEEX +n9yfh0ioi32QRlB9WzjZqcOk2fzhlViPOmSDnXKEuxLRzswO4fZVMQWYNZ7X774wsh6 ifcIZ8PSYp2GVu8/ciREQaxjuSrz/zsPpHPUjLSxe02SXXbqFjYff5lzSbBzpJLeUzRL V0jf8rBl6SgA9S5m2sbB2MFkIlZ294H6c04BKIsMSUpu4FG1DhREpI8uei7dF91NZnrx ZOz60Ku3vaLYPmiEs2u1gSUkYB4kB6NuBK+olef9bkly3x/5PSOcmd3tOnxPFjSbyENo 1WgQ== X-Gm-Message-State: AOAM531w1MMUc3KY5iUOlyPeQ8l2leYGuUb+Ks50E3LXJeBU//GpBnHY XV8WslaLJy3eZ+tBLLJJEJhzvA== X-Google-Smtp-Source: ABdhPJz1lBGe88mxRYFA8if5wEzy7QU/P/qRjYyGINKOvbcj7gWucSaldAbnfnaQCSs4WCfA472i2g== X-Received: by 2002:a62:62c2:0:b029:164:563a:b2c with SMTP id w185-20020a6262c20000b0290164563a0b2cmr22912661pfb.16.1604362387909; Mon, 02 Nov 2020 16:13:07 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:42b0:34ff:fe3d:58e6]) by smtp.gmail.com with ESMTPSA id v16sm13244295pgk.26.2020.11.02.16.13.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2020 16:13:07 -0800 (PST) From: Douglas Anderson To: jkosina@suse.cz, benjamin.tissoires@redhat.com, gregkh@linuxfoundation.org, Dmitry Torokhov Cc: linux-input@vger.kernel.org, hdegoede@redhat.com, swboyd@chromium.org, kai.heng.feng@canonical.com, robh+dt@kernel.org, andrea@borgia.bo.it, Douglas Anderson , Aaron Ma , Daniel Playfair Cal , Jiri Kosina , Pavel Balan , You-Sheng Yang , linux-kernel@vger.kernel.org Subject: [PATCH v3 2/3] HID: i2c-hid: Allow subclasses of i2c-hid for power sequencing Date: Mon, 2 Nov 2020 16:12:40 -0800 Message-Id: <20201102161210.v3.2.Ied4ce10d229cd7c69abf13a0361ba0b8d82eb9c4@changeid> X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog In-Reply-To: <20201102161210.v3.1.Ibb28033c81d87fcc13a6ba28c6ea7ac154d65f93@changeid> References: <20201102161210.v3.1.Ibb28033c81d87fcc13a6ba28c6ea7ac154d65f93@changeid> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This exports some things from i2c-hid so that we can have a driver that's effectively a subclass of it and that can do its own power sequencing. Signed-off-by: Douglas Anderson --- Changes in v3: - Rework to use subclassing. Changes in v2: - Use a separate compatible string for this new touchscreen. - Get timings based on the compatible string. drivers/hid/i2c-hid/i2c-hid-core.c | 78 +++++++++++++++++---------- include/linux/input/i2c-hid-core.h | 19 +++++++ include/linux/platform_data/i2c-hid.h | 9 ++++ 3 files changed, 79 insertions(+), 27 deletions(-) create mode 100644 include/linux/input/i2c-hid-core.h diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index 786e3e9af1c9..910e9089fcf8 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -1007,8 +1008,33 @@ static void i2c_hid_fwnode_probe(struct i2c_client *client, pdata->post_power_delay_ms = val; } -static int i2c_hid_probe(struct i2c_client *client, - const struct i2c_device_id *dev_id) +static int i2c_hid_power_up_device(struct i2c_hid_platform_data *pdata) +{ + struct i2c_hid *ihid = container_of(pdata, struct i2c_hid, pdata); + struct hid_device *hid = ihid->hid; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies), + pdata->supplies); + if (ret) { + if (hid) + hid_warn(hid, "Failed to enable supplies: %d\n", ret); + return ret; + } + + if (pdata->post_power_delay_ms) + msleep(pdata->post_power_delay_ms); + + return 0; +} + +static void i2c_hid_power_down_device(struct i2c_hid_platform_data *pdata) +{ + regulator_bulk_disable(ARRAY_SIZE(pdata->supplies), pdata->supplies); +} + +int i2c_hid_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id) { int ret; struct i2c_hid *ihid; @@ -1035,6 +1061,9 @@ static int i2c_hid_probe(struct i2c_client *client, if (!ihid) return -ENOMEM; + if (platform_data) + ihid->pdata = *platform_data; + if (client->dev.of_node) { ret = i2c_hid_of_probe(client, &ihid->pdata); if (ret) @@ -1043,13 +1072,16 @@ static int i2c_hid_probe(struct i2c_client *client, ret = i2c_hid_acpi_pdata(client, &ihid->pdata); if (ret) return ret; - } else { - ihid->pdata = *platform_data; } /* Parse platform agnostic common properties from ACPI / device tree */ i2c_hid_fwnode_probe(client, &ihid->pdata); + if (!ihid->pdata.power_up_device) + ihid->pdata.power_up_device = i2c_hid_power_up_device; + if (!ihid->pdata.power_down_device) + ihid->pdata.power_down_device = i2c_hid_power_down_device; + ihid->pdata.supplies[0].supply = "vdd"; ihid->pdata.supplies[1].supply = "vddl"; @@ -1059,14 +1091,10 @@ static int i2c_hid_probe(struct i2c_client *client, if (ret) return ret; - ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); - if (ret < 0) + ret = ihid->pdata.power_up_device(&ihid->pdata); + if (ret) return ret; - if (ihid->pdata.post_power_delay_ms) - msleep(ihid->pdata.post_power_delay_ms); - i2c_set_clientdata(client, ihid); ihid->client = client; @@ -1144,13 +1172,13 @@ static int i2c_hid_probe(struct i2c_client *client, free_irq(client->irq, ihid); err_regulator: - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + ihid->pdata.power_down_device(&ihid->pdata); i2c_hid_free_buffers(ihid); return ret; } +EXPORT_SYMBOL_GPL(i2c_hid_probe); -static int i2c_hid_remove(struct i2c_client *client) +int i2c_hid_remove(struct i2c_client *client) { struct i2c_hid *ihid = i2c_get_clientdata(client); struct hid_device *hid; @@ -1163,22 +1191,23 @@ static int i2c_hid_remove(struct i2c_client *client) if (ihid->bufsize) i2c_hid_free_buffers(ihid); - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + ihid->pdata.power_down_device(&ihid->pdata); return 0; } +EXPORT_SYMBOL_GPL(i2c_hid_remove); -static void i2c_hid_shutdown(struct i2c_client *client) +void i2c_hid_shutdown(struct i2c_client *client) { struct i2c_hid *ihid = i2c_get_clientdata(client); i2c_hid_set_power(client, I2C_HID_PWR_SLEEP); free_irq(client->irq, ihid); } +EXPORT_SYMBOL_GPL(i2c_hid_shutdown); #ifdef CONFIG_PM_SLEEP -static int i2c_hid_suspend(struct device *dev) +int i2c_hid_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct i2c_hid *ihid = i2c_get_clientdata(client); @@ -1205,14 +1234,14 @@ static int i2c_hid_suspend(struct device *dev) hid_warn(hid, "Failed to enable irq wake: %d\n", wake_status); } else { - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + ihid->pdata.power_down_device(&ihid->pdata); } return 0; } +EXPORT_SYMBOL_GPL(i2c_hid_suspend); -static int i2c_hid_resume(struct device *dev) +int i2c_hid_resume(struct device *dev) { int ret; struct i2c_client *client = to_i2c_client(dev); @@ -1221,13 +1250,7 @@ static int i2c_hid_resume(struct device *dev) int wake_status; if (!device_may_wakeup(&client->dev)) { - ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); - if (ret) - hid_warn(hid, "Failed to enable supplies: %d\n", ret); - - if (ihid->pdata.post_power_delay_ms) - msleep(ihid->pdata.post_power_delay_ms); + ihid->pdata.power_up_device(&ihid->pdata); } else if (ihid->irq_wake_enabled) { wake_status = disable_irq_wake(client->irq); if (!wake_status) @@ -1262,6 +1285,7 @@ static int i2c_hid_resume(struct device *dev) return 0; } +EXPORT_SYMBOL_GPL(i2c_hid_resume); #endif static const struct dev_pm_ops i2c_hid_pm = { diff --git a/include/linux/input/i2c-hid-core.h b/include/linux/input/i2c-hid-core.h new file mode 100644 index 000000000000..da7b0475f6f4 --- /dev/null +++ b/include/linux/input/i2c-hid-core.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef I2C_HID_CORE_H +#define I2C_HID_CORE_H + +#include + +int i2c_hid_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id); +int i2c_hid_remove(struct i2c_client *client); + +void i2c_hid_shutdown(struct i2c_client *client); + +#ifdef CONFIG_PM_SLEEP +int i2c_hid_suspend(struct device *dev); +int i2c_hid_resume(struct device *dev); +#endif + +#endif diff --git a/include/linux/platform_data/i2c-hid.h b/include/linux/platform_data/i2c-hid.h index c628bb5e1061..db567463d43e 100644 --- a/include/linux/platform_data/i2c-hid.h +++ b/include/linux/platform_data/i2c-hid.h @@ -21,6 +21,11 @@ * @supplies: regulators for powering on the device. * @post_power_delay_ms: delay after powering on before device is usable. * + * @power_up_device: do sequencing to power up the device; may use the above + * supplies / post_power_delay_ms or ignore. + * @power_down_device: do sequencing to power down the device. + * @power_data: opaque pointer that power_up and power_down can use. + * * Note that it is the responsibility of the platform driver (or the acpi 5.0 * driver, or the flattened device tree) to setup the irq related to the gpio in * the struct i2c_board_info. @@ -36,6 +41,10 @@ struct i2c_hid_platform_data { u16 hid_descriptor_address; struct regulator_bulk_data supplies[2]; int post_power_delay_ms; + + int (*power_up_device)(struct i2c_hid_platform_data *pdata); + void (*power_down_device)(struct i2c_hid_platform_data *pdata); + void *power_data; }; #endif /* __LINUX_I2C_HID_H */ From patchwork Tue Nov 3 00:12:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 11875585 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 94B0792A for ; Tue, 3 Nov 2020 00:13:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71FA822275 for ; Tue, 3 Nov 2020 00:13:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="aDVU2nzb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727201AbgKCANL (ORCPT ); Mon, 2 Nov 2020 19:13:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727194AbgKCANK (ORCPT ); Mon, 2 Nov 2020 19:13:10 -0500 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36BE5C061A47 for ; Mon, 2 Nov 2020 16:13:10 -0800 (PST) Received: by mail-pl1-x642.google.com with SMTP id b12so7698557plr.4 for ; Mon, 02 Nov 2020 16:13:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=97UEiB822+bqf5cp9dtnLiwnHYdHrQTsb2r4ia6eYtA=; b=aDVU2nzb2iKQxsov5JiAryU6VsMoZwDbY3EnI6IjFtjZEIEJjKAkEkssfGbDo3tXNi 33bfUPC0/YjtRi5EuPAZZUH7ooyT0pXvS2gtymCaZ1b2/HDZEUscDmt2idjXF5rhkRBj x1AAezfDTresNl0hzFvsrrwlsxysOyySx+IsQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=97UEiB822+bqf5cp9dtnLiwnHYdHrQTsb2r4ia6eYtA=; b=RRHXZJbI+h6BCMQdtX3zhYJCliPllZm0Mtk1ZyI8Nv4OSMSe0jd+LWksISFG6dWV2/ wL8ga9Jz2YDj6VgVHQN6MlLTIFE0UAGREVEE/MbHvrh+YgGQeOlb0JbJZlq5ZOAmatKu qPdNbURHO1sp8PvpfC9VQ/vPTxPPn0eWAStL1GqjQLQWF0pJb5sfcxuq/lx3VokZT5hm iGzrxQayKB+AXeztOgIlw2HmfdV6sffeugPiV1+4udFfBTy2AZOJz8ukqTyGloG+yZok 1wjQ5VNHm2uhtBONwI+uRyoi/jzrUyRg/aOXKYj59BHHnKUsQJjjUf1IfHy/dnrQgMrs zvbg== X-Gm-Message-State: AOAM530Yw7VmXLBA2EeDZtL1rkvUt/9oxlKLePPrFf3Ncznhf19LOHaH +0XS4LAmCOskMztmlbBy+v4z+g== X-Google-Smtp-Source: ABdhPJyQMaFVKP/JVrDd7qFFIFAJNqE7LOR3R6jgdcD/jZC/RstC2B1bNRiN5YSLqjnkisQ1/NKapA== X-Received: by 2002:a17:902:c383:b029:d6:991c:671b with SMTP id g3-20020a170902c383b02900d6991c671bmr18366735plg.51.1604362389743; Mon, 02 Nov 2020 16:13:09 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:42b0:34ff:fe3d:58e6]) by smtp.gmail.com with ESMTPSA id v16sm13244295pgk.26.2020.11.02.16.13.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2020 16:13:09 -0800 (PST) From: Douglas Anderson To: jkosina@suse.cz, benjamin.tissoires@redhat.com, gregkh@linuxfoundation.org, Dmitry Torokhov Cc: linux-input@vger.kernel.org, hdegoede@redhat.com, swboyd@chromium.org, kai.heng.feng@canonical.com, robh+dt@kernel.org, andrea@borgia.bo.it, Douglas Anderson , Krzysztof Kozlowski , Linus Walleij , Michael Srba , linux-kernel@vger.kernel.org Subject: [PATCH v3 3/3] Input: Introduce goodix-i2c-hid as a subclass of i2c-hid Date: Mon, 2 Nov 2020 16:12:41 -0800 Message-Id: <20201102161210.v3.3.If41b7d621633b94d56653c6d53f5f89c5274de7b@changeid> X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog In-Reply-To: <20201102161210.v3.1.Ibb28033c81d87fcc13a6ba28c6ea7ac154d65f93@changeid> References: <20201102161210.v3.1.Ibb28033c81d87fcc13a6ba28c6ea7ac154d65f93@changeid> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Goodix i2c-hid touchscreens are mostly i2c-hid compliant but have some special power sequencing requirements, including the need to drive a reset line during the sequencing. Let's use the new ability of i2c-hid to have subclasses for power sequencing to support the first Goodix i2c-hid touchscreen: GT7375P Signed-off-by: Douglas Anderson Reported-by: kernel test robot --- Changes in v3: - Rework to use subclassing. drivers/input/touchscreen/Kconfig | 12 +++ drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/goodix-i2c-hid.c | 115 +++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 drivers/input/touchscreen/goodix-i2c-hid.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index f012fe746df0..64d481101917 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -403,6 +403,18 @@ config TOUCHSCREEN_GOODIX To compile this driver as a module, choose M here: the module will be called goodix. +config TOUCHSCREEN_GOODIX_I2C_HID + tristate "Goodix I2C-HID touchscreen" + depends on I2C_HID + help + Say Y here if you have a Goodix touchscreen that uses i2c-hid + to communicate. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called goodix-i2c-hid. + config TOUCHSCREEN_HIDEEP tristate "HiDeep Touch IC" depends on I2C diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 6233541e9173..32b1a768aa06 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_TOUCHSCREEN_EGALAX_SERIAL) += egalax_ts_serial.o obj-$(CONFIG_TOUCHSCREEN_EXC3000) += exc3000.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix.o +obj-$(CONFIG_TOUCHSCREEN_GOODIX_I2C_HID) += goodix-i2c-hid.o obj-$(CONFIG_TOUCHSCREEN_HIDEEP) += hideep.o obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o obj-$(CONFIG_TOUCHSCREEN_IMX6UL_TSC) += imx6ul_tsc.o diff --git a/drivers/input/touchscreen/goodix-i2c-hid.c b/drivers/input/touchscreen/goodix-i2c-hid.c new file mode 100644 index 000000000000..a2cc4f923d8a --- /dev/null +++ b/drivers/input/touchscreen/goodix-i2c-hid.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Goodix touchscreens that use the i2c-hid protocol. + * + * Copyright 2020 Google LLC + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct goodix_i2c_hid_timing_data { + unsigned int post_gpio_reset_delay_ms; + unsigned int post_power_delay_ms; +}; + +static const struct goodix_i2c_hid_timing_data goodix_gt7375p_timing_data = { + .post_power_delay_ms = 10, + .post_gpio_reset_delay_ms = 120, +}; + +struct goodix_i2c_hid_plat_data { + struct gpio_desc *reset_gpio; + const struct goodix_i2c_hid_timing_data *timings; + + struct i2c_hid_platform_data ihid_pdata; +}; + +static int goodix_i2c_hid_power_up_device(struct i2c_hid_platform_data *ihid_pdata) +{ + struct goodix_i2c_hid_plat_data *pdata = ihid_pdata->power_data; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ihid_pdata->supplies), + ihid_pdata->supplies); + if (ret) + return ret; + + if (pdata->timings->post_power_delay_ms) + msleep(pdata->timings->post_power_delay_ms); + + gpiod_set_value_cansleep(pdata->reset_gpio, 0); + if (pdata->timings->post_gpio_reset_delay_ms) + msleep(pdata->timings->post_gpio_reset_delay_ms); + + return 0; +} + +static void goodix_i2c_hid_power_down_device(struct i2c_hid_platform_data *ihid_pdata) +{ + struct goodix_i2c_hid_plat_data *pdata = ihid_pdata->power_data; + + gpiod_set_value_cansleep(pdata->reset_gpio, 1); + regulator_bulk_disable(ARRAY_SIZE(ihid_pdata->supplies), + ihid_pdata->supplies); +} + +static int goodix_i2c_hid_ts_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct goodix_i2c_hid_plat_data *pdata; + + pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); + + /* Start out with reset asserted */ + pdata->reset_gpio = + devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(pdata->reset_gpio)) + return PTR_ERR(pdata->reset_gpio); + + pdata->timings = device_get_match_data(&client->dev); + + pdata->ihid_pdata.hid_descriptor_address = 0x0001; + pdata->ihid_pdata.power_data = pdata; + pdata->ihid_pdata.power_up_device = goodix_i2c_hid_power_up_device; + pdata->ihid_pdata.power_down_device = goodix_i2c_hid_power_down_device; + + client->dev.platform_data = &pdata->ihid_pdata; + + return i2c_hid_probe(client, id); +} + +static const struct of_device_id goodix_i2c_hid_of_match[] = { + { .compatible = "goodix,gt7375p", .data = &goodix_gt7375p_timing_data }, + { } +}; +MODULE_DEVICE_TABLE(of, goodix_i2c_hid_of_match); + +static const struct dev_pm_ops goodix_i2c_hid_pm = { + SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume) +}; + +static struct i2c_driver goodix_i2c_hid_ts_driver = { + .driver = { + .name = "goodix-i2c-hid", + .pm = &goodix_i2c_hid_pm, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = of_match_ptr(goodix_i2c_hid_of_match), + }, + .probe = goodix_i2c_hid_ts_probe, + .remove = i2c_hid_remove, + .shutdown = i2c_hid_shutdown, +}; +module_i2c_driver(goodix_i2c_hid_ts_driver); + +MODULE_AUTHOR("Douglas Anderson "); +MODULE_DESCRIPTION("Goodix i2c-hid touchscreen driver"); +MODULE_LICENSE("GPL v2");