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 */