From patchwork Fri Aug 21 22:19:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 11730657 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 772AA1392 for ; Fri, 21 Aug 2020 22:20:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5424D22B43 for ; Fri, 21 Aug 2020 22:20:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FVrhKSq2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727056AbgHUWUX (ORCPT ); Fri, 21 Aug 2020 18:20:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726961AbgHUWUD (ORCPT ); Fri, 21 Aug 2020 18:20:03 -0400 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 02FCEC061755; Fri, 21 Aug 2020 15:20:03 -0700 (PDT) Received: by mail-ej1-x643.google.com with SMTP id t10so4288874ejs.8; Fri, 21 Aug 2020 15:20:02 -0700 (PDT) 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=zMthiZT2NeBo4z+Tre4A12a08qtWv+UHANpqxUG9nY4=; b=FVrhKSq2vzzQBlap53idLCXY1+LLrqniKthxSbVsQO2qqC9UiZmI8RMx4aA22EIm9+ y0TSQ3XykSsMZ+iHBM3ISrPPatqdMoZfzU+Mc2PQ9mEMPTWbliK9Yvi7caOZhIIkbI58 L9Gqy4pCP/fQhRNzWd/uPvGQjcTYfMI3vEU5hC+/KVVRyeeYYTJAVP5/PK/FjQlsLykA GDe+FxaHCbekfBoeifEUav6DPhZoIG0UbGQShuMDntzKepslAgYGPazjmH22jkHhPFx6 11Ubpo8CgpvixPQkEWDTKWGwOohTs/yugZwPPwwwuWjmCTGjj3hJqEEIzZ7bp1/yW1do kN8A== 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=zMthiZT2NeBo4z+Tre4A12a08qtWv+UHANpqxUG9nY4=; b=HIjWSsVdktRyWiXN/p5T87EXw1UD9T68fiv9ATuL8ZeCbogUvEBO4lmWJ4LS8y/nk7 cWj90rZ1UxKxa1lQq1dY5ZdF2CZsp/Th5c5tQgk+Dsng7HpUKvKaIfCvFAf3bXxoLT44 Qz9Bewsn/J4VEaxxvBss88OmK/NySvvyMNCAT83j07MEXX1N5Npv07Zb5mBQ3xs6LnQx EmNthI7DIsrF8HOQzFSdQah2mg/CtzIpvFT58Kfcqdsdv6JoX/B5tBH0KzTnCcsrAgKr hmAbt9lsdim+rH87LQSi1NUi/EFIaqUviMF+U0MeNRirDDB/UOh6okhVWVTC5ExWdV3E +qjw== X-Gm-Message-State: AOAM530ettwlNKGzdLzXXT2ozsZpvtl2ORO1vpQ43Li3ZpY/btMmkwgR TnbHLfnrwmhqj41VFK4qfWs= X-Google-Smtp-Source: ABdhPJxoHXPxbNKgYO7m5sDpnoXzzxCkZZhZWA63r59Bljf1m1t5BugntxptHaMQOfRlEPaCYRkcLA== X-Received: by 2002:a17:906:9609:: with SMTP id s9mr4987849ejx.232.1598048401628; Fri, 21 Aug 2020 15:20:01 -0700 (PDT) Received: from localhost.localdomain ([188.24.159.61]) by smtp.gmail.com with ESMTPSA id p23sm1780147edm.31.2020.08.21.15.20.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Aug 2020 15:20:01 -0700 (PDT) From: Cristian Ciocaltea To: Lee Jones , Rob Herring , Dmitry Torokhov , Sebastian Reichel , Liam Girdwood , Mark Brown Cc: Manivannan Sadhasivam , =?utf-8?q?Andr?= =?utf-8?q?eas_F=C3=A4rber?= , 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 v2 5/6] input: atc260x: Add onkey driver for ATC260x PMICs Date: Sat, 22 Aug 2020 01:19:51 +0300 Message-Id: X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org 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 --- drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 2 +- drivers/input/misc/atc260x-onkey.c | 304 +++++++++++++++++++++++++++++ 3 files changed, 316 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..7caec7d6f9ac --- /dev/null +++ b/drivers/input/misc/atc260x-onkey.c @@ -0,0 +1,304 @@ +// 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; +}; + +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_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, irq, ret; + + if (!pdev->dev.of_node) + return -ENXIO; + + onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL); + if (!onkey) + return -ENOMEM; + + ret = device_property_read_u32(&pdev->dev, + "actions,reset-time-sec", &val); + if (ret) { + reset_status = KEY_RESET_HW_DEFAULT; + } else if (val) { + if (val < 6 || val > 12) { + dev_err(&pdev->dev, "actions,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_info(&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->evbit[0] = BIT_MASK(EV_KEY); + input_set_capability(input_dev, EV_KEY, KEY_POWER); + + INIT_DELAYED_WORK(&onkey->work, atc260x_onkey_work); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + atc260x_onkey_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + dev_name(&pdev->dev), onkey); + if (ret) { + dev_err(&pdev->dev, + "Failed to register IRQ %d: %d\n", irq, ret); + return ret; + } + + ret = input_register_device(input_dev); + if (ret) { + dev_err(&pdev->dev, + "Failed to register input device: %d\n", ret); + return ret; + } + + ret = atc2603x_onkey_hw_init(onkey, reset_status, + reset_time, press_time); + if (ret) + return ret; + + platform_set_drvdata(pdev, onkey); + device_init_wakeup(&pdev->dev, true); + + return 0; +} + +static int atc260x_onkey_remove(struct platform_device *pdev) +{ + struct atc260x_onkey *onkey = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&onkey->work); + + return 0; +} + +static const struct of_device_id atc260x_onkey_of_match[] = { + { .compatible = "actions,atc2603c-onkey" }, + { .compatible = "actions,atc2609a-onkey" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, atc260x_onkey_of_match); + +static struct platform_driver atc260x_onkey_driver = { + .probe = atc260x_onkey_probe, + .remove = atc260x_onkey_remove, + .driver = { + .name = "atc260x-onkey", + .of_match_table = of_match_ptr(atc260x_onkey_of_match), + }, +}; + +module_platform_driver(atc260x_onkey_driver); + +MODULE_DESCRIPTION("Onkey driver for ATC260x PMICs"); +MODULE_AUTHOR("Cristian Ciocaltea "); +MODULE_LICENSE("GPL");