From patchwork Sun Dec 6 01:27:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 11953583 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74B19C2BB48 for ; Sun, 6 Dec 2020 01:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 45FEC23128 for ; Sun, 6 Dec 2020 01:28:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727133AbgLFB2e (ORCPT ); Sat, 5 Dec 2020 20:28:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726408AbgLFB2d (ORCPT ); Sat, 5 Dec 2020 20:28:33 -0500 Received: from mail-ej1-x643.google.com (mail-ej1-x643.google.com [IPv6:2a00:1450:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75D69C061A53; Sat, 5 Dec 2020 17:27:22 -0800 (PST) Received: by mail-ej1-x643.google.com with SMTP id ce23so10518545ejb.8; Sat, 05 Dec 2020 17:27:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tF4tSIpvjbqoEmCAjZzirlpixzPvlM5k05FCh/y/0oM=; b=OetViarZUy2cMEU4fl8iUVcS76skY655d6j3vu3v8J+R8LD2UGcGRu48NZFJI66JYr D0Utsm6qpvGJgb8HBQof4YPAdperNW9QW6F4Or0wBZcmFs2gnc5txe0lGcpoHoW20Jcf 1crZtQCB2eCJmpUPDg21nBESwuKXCRHYaoQgThhnSpki1vipYmUZIWzbpI6KQi2H3rPM HPBKiCXmfRYZI04uho4CxjcBolx6iSe9Hc2jYisIzc71KvrvWPFB/AIm4vUhbJAMlAF2 Zz63WdR7gLAtlgmitdEfX3+gMp397FsWr2nE4aTx51ds5LWoODYVWFVHvmESydI9Bv90 QYqQ== 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=tF4tSIpvjbqoEmCAjZzirlpixzPvlM5k05FCh/y/0oM=; b=H8adoogTuTYBAv+NSNWz2JTeGMrzYFUPShffIPAdrFx+f8mbjFFeDC/myynMuc1ozO 9t1NdXpB6Q63WjDnUqkf3pNVGBJ9vW+ZwpIS6VW6p6mu7TVSaWDDgaA89szhukbJ6u25 hv/STGkIX/WO/e4JhDMbk+7wD99TcE4pO53Z1cdxushqzD3QnunFgKNt66kkX5Wy5Ttr YYhGXTYB7dABnPk6q+wrmsZ4H4zkh8BKThoMbX9s4k8KGJyJ5KA37Qi+PwXzQWOLDl3E kNHyQqi1x4TfIYADTolSK/XXnVQt8ik/4iMqZiTJvFmzBGgSPSKyJP7/1RP79bA+Q5wO B7wg== X-Gm-Message-State: AOAM533JBgka/OrFX3qFY3vNY2bbxRPUvPjVgpTuDNZnfFJhLVUStKs8 rQt8z6hxILaHvqujzPGgYsk= X-Google-Smtp-Source: ABdhPJxseB0+EJPxnt0jhk+QLd7WO2UsTWwpE0QEcDFdBBLc0ujyQvXScTczMs2qvweHtTGjOg3FEw== X-Received: by 2002:a17:906:175b:: with SMTP id d27mr13565040eje.260.1607218041095; Sat, 05 Dec 2020 17:27:21 -0800 (PST) Received: from localhost.localdomain ([188.24.159.61]) by smtp.gmail.com with ESMTPSA id a10sm6157023ejk.92.2020.12.05.17.27.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Dec 2020 17:27:20 -0800 (PST) From: Cristian Ciocaltea To: Lee Jones , Rob Herring , Dmitry Torokhov , Sebastian Reichel , Mark Brown , Manivannan Sadhasivam , Liam Girdwood , =?utf-8?q?Andreas_F=C3=A4rber?= Cc: linux-actions@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v3 6/7] input: atc260x: Add onkey driver for ATC260x PMICs Date: Sun, 6 Dec 2020 03:27:06 +0200 Message-Id: X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The Actions Semi ATC260x PMICs are able to manage an onkey button. This driver exposes the ATC260x onkey as an input device. It can also be configured to force a system reset on a long key-press with an adjustable duration. The currently supported chip variants are ATC2603C and ATC2609A. Signed-off-by: Cristian Ciocaltea Acked-by: Dmitry Torokhov --- Changes in v3: - Integrated Dmitry's review: * Dropped the logic around the check for 'pdev->dev.of_node' * Renamed 'ret' variable in 'atc260x_onkey_probe()' to 'error' * Used 'dev_dbg' instead of 'dev_info' on status KEY_RESET_DISABLED * Dropped 'input_dev->evbit[0] = BIT_MASK(EV_KEY);' * Removed IRQF_TRIGGER_HIGH flag on 'devm_request_threaded_irq()' * Implemented open/close to mitigate the racing issue in 'atc260x_onkey_remove()' which has been dropped now - Removed the unnecessary driver compatibles - Used 'reset-time-sec' property of the parent device instead of 'actions,reset-time-sec' of now obsolete and removed 'onkey' DT node drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 2 +- drivers/input/misc/atc260x-onkey.c | 305 +++++++++++++++++++++++++++++ 3 files changed, 317 insertions(+), 1 deletion(-) create mode 100644 drivers/input/misc/atc260x-onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 362e8a01980c..9e297ebdea57 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -83,6 +83,17 @@ config INPUT_ARIZONA_HAPTICS To compile this driver as a module, choose M here: the module will be called arizona-haptics. +config INPUT_ATC260X_ONKEY + tristate "Actions Semi ATC260x PMIC ONKEY" + depends on MFD_ATC260X + help + Support the ONKEY of ATC260x PMICs as an input device reporting + power button status. ONKEY can be used to wakeup from low power + modes and force a reset on long press. + + To compile this driver as a module, choose M here: the + module will be called atc260x-onkey. + config INPUT_ATMEL_CAPTOUCH tristate "Atmel Capacitive Touch Button Driver" depends on OF || COMPILE_TEST diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index a48e5f2d859d..7f854c6ecefa 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_INPUT_ADXL34X_I2C) += adxl34x-i2c.o obj-$(CONFIG_INPUT_ADXL34X_SPI) += adxl34x-spi.o obj-$(CONFIG_INPUT_APANEL) += apanel.o obj-$(CONFIG_INPUT_ARIZONA_HAPTICS) += arizona-haptics.o +obj-$(CONFIG_INPUT_ATC260X_ONKEY) += atc260x-onkey.o obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o obj-$(CONFIG_INPUT_ATMEL_CAPTOUCH) += atmel_captouch.o @@ -84,4 +85,3 @@ obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) += ideapad_slidebar.o - diff --git a/drivers/input/misc/atc260x-onkey.c b/drivers/input/misc/atc260x-onkey.c new file mode 100644 index 000000000000..999aabf9dcbd --- /dev/null +++ b/drivers/input/misc/atc260x-onkey.c @@ -0,0 +1,305 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Onkey driver for Actions Semi ATC260x PMICs. + * + * Copyright (c) 2020 Cristian Ciocaltea + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* <2s for short press, >2s for long press */ +#define KEY_PRESS_TIME_SEC 2 + +/* Driver internals */ +enum atc260x_onkey_reset_status { + KEY_RESET_HW_DEFAULT, + KEY_RESET_DISABLED, + KEY_RESET_USER_SEL, +}; + +struct atc260x_onkey_params { + u32 reg_int_ctl; + u32 kdwn_state_bm; + u32 long_int_pnd_bm; + u32 short_int_pnd_bm; + u32 kdwn_int_pnd_bm; + u32 press_int_en_bm; + u32 kdwn_int_en_bm; + u32 press_time_bm; + u32 reset_en_bm; + u32 reset_time_bm; +}; + +struct atc260x_onkey { + struct atc260x *atc260x; + const struct atc260x_onkey_params *params; + struct input_dev *input_dev; + struct delayed_work work; + int irq; +}; + +static const struct atc260x_onkey_params atc2603c_onkey_params = { + .reg_int_ctl = ATC2603C_PMU_SYS_CTL2, + .long_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_LONG_PRESS, + .short_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_SHORT_PRESS, + .kdwn_int_pnd_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_PD, + .press_int_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_INT_EN, + .kdwn_int_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_INT_EN, + .kdwn_state_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS, + .press_time_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_TIME, + .reset_en_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_RESET_EN, + .reset_time_bm = ATC2603C_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL, +}; + +static const struct atc260x_onkey_params atc2609a_onkey_params = { + .reg_int_ctl = ATC2609A_PMU_SYS_CTL2, + .long_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_LONG_PRESS, + .short_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_SHORT_PRESS, + .kdwn_int_pnd_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_PD, + .press_int_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_LSP_INT_EN, + .kdwn_int_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_INT_EN, + .kdwn_state_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS, + .press_time_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_TIME, + .reset_en_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_RESET_EN, + .reset_time_bm = ATC2609A_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL, +}; + +static int atc2603x_onkey_hw_init(struct atc260x_onkey *onkey, + enum atc260x_onkey_reset_status reset_status, + u32 reset_time, u32 press_time) +{ + u32 reg_bm, reg_val; + + reg_bm = onkey->params->long_int_pnd_bm | + onkey->params->short_int_pnd_bm | + onkey->params->kdwn_int_pnd_bm | + onkey->params->press_int_en_bm | + onkey->params->kdwn_int_en_bm; + + reg_val = reg_bm | press_time; + reg_bm |= onkey->params->press_time_bm; + + if (reset_status == KEY_RESET_DISABLED) { + reg_bm |= onkey->params->reset_en_bm; + } else if (reset_status == KEY_RESET_USER_SEL) { + reg_bm |= onkey->params->reset_en_bm | + onkey->params->reset_time_bm; + reg_val |= onkey->params->reset_en_bm | reset_time; + } + + return regmap_update_bits(onkey->atc260x->regmap, + onkey->params->reg_int_ctl, reg_bm, reg_val); +} + +static void atc260x_onkey_query(struct atc260x_onkey *onkey) +{ + u32 reg_bits; + int ret, key_down; + + ret = regmap_read(onkey->atc260x->regmap, + onkey->params->reg_int_ctl, &key_down); + if (ret) { + key_down = 1; + dev_err(onkey->atc260x->dev, + "Failed to read onkey status: %d\n", ret); + } else { + key_down &= onkey->params->kdwn_state_bm; + } + + /* + * The hardware generates interrupt only when the onkey pin is + * asserted. Hence, the deassertion of the pin is simulated through + * work queue. + */ + if (key_down) { + schedule_delayed_work(&onkey->work, msecs_to_jiffies(200)); + return; + } + + /* + * The key-down status bit is cleared when the On/Off button + * is released. + */ + input_report_key(onkey->input_dev, KEY_POWER, 0); + input_sync(onkey->input_dev); + + reg_bits = onkey->params->long_int_pnd_bm | + onkey->params->short_int_pnd_bm | + onkey->params->kdwn_int_pnd_bm | + onkey->params->press_int_en_bm | + onkey->params->kdwn_int_en_bm; + + /* Clear key press pending events and enable key press interrupts. */ + regmap_update_bits(onkey->atc260x->regmap, onkey->params->reg_int_ctl, + reg_bits, reg_bits); +} + +static void atc260x_onkey_work(struct work_struct *work) +{ + struct atc260x_onkey *onkey = container_of(work, struct atc260x_onkey, + work.work); + atc260x_onkey_query(onkey); +} + +static irqreturn_t atc260x_onkey_irq(int irq, void *data) +{ + struct atc260x_onkey *onkey = data; + int ret; + + /* Disable key press interrupts. */ + ret = regmap_update_bits(onkey->atc260x->regmap, + onkey->params->reg_int_ctl, + onkey->params->press_int_en_bm | + onkey->params->kdwn_int_en_bm, 0); + if (ret) + dev_err(onkey->atc260x->dev, + "Failed to disable interrupts: %d\n", ret); + + input_report_key(onkey->input_dev, KEY_POWER, 1); + input_sync(onkey->input_dev); + + atc260x_onkey_query(onkey); + + return IRQ_HANDLED; +} + +static int atc260x_onkey_open(struct input_dev *dev) +{ + struct atc260x_onkey *onkey = input_get_drvdata(dev); + + enable_irq(onkey->irq); + + return 0; +} + +static void atc260x_onkey_close(struct input_dev *dev) +{ + struct atc260x_onkey *onkey = input_get_drvdata(dev); + + disable_irq(onkey->irq); + cancel_delayed_work_sync(&onkey->work); +} + +static int atc260x_onkey_probe(struct platform_device *pdev) +{ + struct atc260x *atc260x = dev_get_drvdata(pdev->dev.parent); + struct atc260x_onkey *onkey; + struct input_dev *input_dev; + enum atc260x_onkey_reset_status reset_status; + u32 press_time = KEY_PRESS_TIME_SEC, reset_time = 0; + int val, error; + + onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL); + if (!onkey) + return -ENOMEM; + + error = device_property_read_u32(pdev->dev.parent, + "reset-time-sec", &val); + if (error) { + reset_status = KEY_RESET_HW_DEFAULT; + } else if (val) { + if (val < 6 || val > 12) { + dev_err(&pdev->dev, "reset-time-sec out of range\n"); + return -EINVAL; + } + + reset_status = KEY_RESET_USER_SEL; + reset_time = (val - 6) / 2; + } else { + reset_status = KEY_RESET_DISABLED; + dev_dbg(&pdev->dev, "Disabled reset on long-press\n"); + } + + switch (atc260x->ic_type) { + case ATC2603C: + onkey->params = &atc2603c_onkey_params; + press_time = FIELD_PREP(ATC2603C_PMU_SYS_CTL2_ONOFF_PRESS_TIME, + press_time); + reset_time = FIELD_PREP(ATC2603C_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL, + reset_time); + break; + case ATC2609A: + onkey->params = &atc2609a_onkey_params; + press_time = FIELD_PREP(ATC2609A_PMU_SYS_CTL2_ONOFF_PRESS_TIME, + press_time); + reset_time = FIELD_PREP(ATC2609A_PMU_SYS_CTL2_ONOFF_RESET_TIME_SEL, + reset_time); + break; + default: + dev_err(&pdev->dev, + "OnKey not supported for ATC260x PMIC type: %u\n", + atc260x->ic_type); + return -EINVAL; + } + + input_dev = devm_input_allocate_device(&pdev->dev); + if (!input_dev) { + dev_err(&pdev->dev, "Failed to allocate input device\n"); + return -ENOMEM; + } + + onkey->input_dev = input_dev; + onkey->atc260x = atc260x; + + input_dev->name = "atc260x-onkey"; + input_dev->phys = "atc260x-onkey/input0"; + input_dev->open = atc260x_onkey_open; + input_dev->close = atc260x_onkey_close; + + input_set_capability(input_dev, EV_KEY, KEY_POWER); + input_set_drvdata(input_dev, onkey); + + INIT_DELAYED_WORK(&onkey->work, atc260x_onkey_work); + + onkey->irq = platform_get_irq(pdev, 0); + if (onkey->irq < 0) + return onkey->irq; + + error = devm_request_threaded_irq(&pdev->dev, onkey->irq, NULL, + atc260x_onkey_irq, IRQF_ONESHOT, + dev_name(&pdev->dev), onkey); + if (error) { + dev_err(&pdev->dev, + "Failed to register IRQ %d: %d\n", onkey->irq, error); + return error; + } + + /* Keep IRQ disabled until atc260x_onkey_open() is called. */ + disable_irq(onkey->irq); + + error = input_register_device(input_dev); + if (error) { + dev_err(&pdev->dev, + "Failed to register input device: %d\n", error); + return error; + } + + error = atc2603x_onkey_hw_init(onkey, reset_status, + reset_time, press_time); + if (error) + return error; + + device_init_wakeup(&pdev->dev, true); + + return 0; +} + +static struct platform_driver atc260x_onkey_driver = { + .probe = atc260x_onkey_probe, + .driver = { + .name = "atc260x-onkey", + }, +}; + +module_platform_driver(atc260x_onkey_driver); + +MODULE_DESCRIPTION("Onkey driver for ATC260x PMICs"); +MODULE_AUTHOR("Cristian Ciocaltea "); +MODULE_LICENSE("GPL");