From patchwork Thu Jul 5 15:14:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pascal Paillet X-Patchwork-Id: 10509613 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 333FD6024A for ; Thu, 5 Jul 2018 15:16:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 21EF729059 for ; Thu, 5 Jul 2018 15:16:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 156DC291BB; Thu, 5 Jul 2018 15:16:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 579CE29059 for ; Thu, 5 Jul 2018 15:16:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932300AbeGEPPr convert rfc822-to-8bit (ORCPT ); Thu, 5 Jul 2018 11:15:47 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:27958 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754335AbeGEPOw (ORCPT ); Thu, 5 Jul 2018 11:14:52 -0400 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w65F4RKS023275; Thu, 5 Jul 2018 17:14:26 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2k0dr4hrxk-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 05 Jul 2018 17:14:26 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 8C73D31; Thu, 5 Jul 2018 15:14:25 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag6node3.st.com [10.75.127.18]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 5333626DC; Thu, 5 Jul 2018 15:14:25 +0000 (GMT) Received: from SFHDAG6NODE2.st.com (10.75.127.17) by SFHDAG6NODE3.st.com (10.75.127.18) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 5 Jul 2018 17:14:25 +0200 Received: from SFHDAG6NODE2.st.com ([fe80::a56f:c186:bab7:13d6]) by SFHDAG6NODE2.st.com ([fe80::a56f:c186:bab7:13d6%20]) with mapi id 15.00.1347.000; Thu, 5 Jul 2018 17:14:24 +0200 From: Pascal PAILLET-LME To: "dmitry.torokhov@gmail.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "lee.jones@linaro.org" , "lgirdwood@gmail.com" , "broonie@kernel.org" , "wim@linux-watchdog.org" , "linux@roeck-us.net" , "linux-input@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-watchdog@vger.kernel.org" , "benjamin.gaignard@linaro.org" CC: Pascal PAILLET-LME Subject: [PATCH 6/8] input: stpmu1: add stpmu1 onkey driver Thread-Topic: [PATCH 6/8] input: stpmu1: add stpmu1 onkey driver Thread-Index: AQHUFHLb9VeZCANeCka6TfM6xBddsA== Date: Thu, 5 Jul 2018 15:14:24 +0000 Message-ID: <1530803657-17684-7-git-send-email-p.paillet@st.com> References: <1530803657-17684-1-git-send-email-p.paillet@st.com> In-Reply-To: <1530803657-17684-1-git-send-email-p.paillet@st.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.75.127.50] MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-07-05_05:, , signatures=0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: pascal paillet The stpmu1 pmic is able to manage an onkey button. This driver exposes the stpmu1 onkey as an input device. It can also be configured to shut-down the power supplies on a long key-press with an adjustable duration. Signed-off-by: pascal paillet --- drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 2 + drivers/input/misc/stpmu1_onkey.c | 321 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 334 insertions(+) create mode 100644 drivers/input/misc/stpmu1_onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index c25606e..d020971 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -841,4 +841,15 @@ config INPUT_RAVE_SP_PWRBUTTON To compile this driver as a module, choose M here: the module will be called rave-sp-pwrbutton. +config INPUT_STPMU1_ONKEY + tristate "STPMU1 PMIC Onkey support" + depends on MFD_STPMU1 + help + Say Y to enable support of onkey embedded into STPMU1 PMIC. onkey + can be used to wakeup from low power modes and force a shut-down on + long press. + + To compile this driver as a module, choose M here: the + module will be called stpmu1_onkey. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 72cde28..cc60dc1 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o +obj-$(CONFIG_INPUT_STPMU1_ONKEY) += stpmu1_onkey.o obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o @@ -80,3 +81,4 @@ 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/stpmu1_onkey.c b/drivers/input/misc/stpmu1_onkey.c new file mode 100644 index 0000000..084a31f --- /dev/null +++ b/drivers/input/misc/stpmu1_onkey.c @@ -0,0 +1,321 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) STMicroelectronics 2018 - All Rights Reserved + * Author: Philippe Peurichard , + * Pascal Paillet for STMicroelectronics. + */ + +#include +#include +#include +#include +#include +#include +#include + +/** + * struct stpmu1_onkey - OnKey data + * @pmic: pointer to STPMU1 PMIC device + * @input_dev: pointer to input device + * @irq_falling: irq that we are hooked on to + * @irq_rising: irq that we are hooked on to + */ +struct stpmu1_onkey { + struct stpmu1_dev *pmic; + struct input_dev *input_dev; + int irq_falling; + int irq_rising; +}; + +/** + * struct pmic_onkey_config - configuration of pmic PONKEYn + * @turnoff_enabled: value to enable turnoff condition + * @cc_flag_clear: value to clear CC flag in case of PowerOff + * trigger by longkey press + * @onkey_pullup_val: value of PONKEY PullUp (active or inactive) + * @long_press_time_val: value for long press h/w shutdown event + */ +struct pmic_onkey_config { + bool turnoff_enabled; + bool cc_flag_clear; + u8 onkey_pullup_val; + u8 long_press_time_val; +}; + +/** + * onkey_falling_irq() - button press isr + * @irq: irq + * @pmic_onkey: onkey device + * + * Return: IRQ_HANDLED + */ +static irqreturn_t onkey_falling_irq(int irq, void *ponkey) +{ + struct stpmu1_onkey *onkey = ponkey; + struct input_dev *input_dev = onkey->input_dev; + + input_report_key(input_dev, KEY_POWER, 1); + pm_wakeup_event(input_dev->dev.parent, 0); + input_sync(input_dev); + + dev_dbg(&input_dev->dev, "Pwr Onkey Falling Interrupt received\n"); + + return IRQ_HANDLED; +} + +/** + * onkey_rising_irq() - button released isr + * @irq: irq + * @pmic_onkey: onkey device + * + * Return: IRQ_HANDLED + */ +static irqreturn_t onkey_rising_irq(int irq, void *ponkey) +{ + struct stpmu1_onkey *onkey = ponkey; + struct input_dev *input_dev = onkey->input_dev; + + input_report_key(input_dev, KEY_POWER, 0); + pm_wakeup_event(input_dev->dev.parent, 0); + input_sync(input_dev); + + dev_dbg(&input_dev->dev, "Pwr Onkey Rising Interrupt received\n"); + + return IRQ_HANDLED; +} + +/** + * stpmu1_onkey_dt_params() - device tree parameter parser + * @pdev: platform device for the PONKEY + * @onkey: pointer to onkey driver data + * @config: configuration params to be filled up + */ +static int stpmu1_onkey_dt_params(struct platform_device *pdev, + struct stpmu1_onkey *onkey, + struct pmic_onkey_config *config) +{ + struct device *dev = &pdev->dev; + struct device_node *np; + u32 val; + + np = dev->of_node; + if (!np) + return -EINVAL; + + onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling"); + if (onkey->irq_falling < 0) { + dev_err(dev, "failed: request IRQ onkey-falling %d", + onkey->irq_falling); + return onkey->irq_falling; + } + + onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising"); + if (onkey->irq_rising < 0) { + dev_err(dev, "failed: request IRQ onkey-rising %d", + onkey->irq_rising); + return onkey->irq_rising; + } + + if (!of_property_read_u32(np, "st,onkey-long-press-seconds", &val)) { + if (val >= 1 && val <= 16) { + config->long_press_time_val = (16 - val); + } else { + dev_warn(dev, + "Invalid range of long key pressed timer %d (<16)\n\r", + val); + } + } + if (of_get_property(np, "st,onkey-pwroff-enabled", NULL)) + config->turnoff_enabled = true; + + if (of_get_property(np, "st,onkey-clear-cc-flag", NULL)) + config->cc_flag_clear = true; + + if (of_get_property(np, "st,onkey-pu-inactive", NULL)) + config->onkey_pullup_val = PONKEY_PU_ACTIVE; + + dev_dbg(dev, "onkey-switch-off duration=%d seconds\n", + config->long_press_time_val); + + return 0; +} + +/** + * stpmu1_onkey_probe() - probe + * @pdev: platform device for the PONKEY + * + * Return: 0 for successful probe else appropriate error + */ +static int stpmu1_onkey_probe(struct platform_device *pdev) +{ + struct stpmu1_dev *pmic = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct input_dev *input_dev; + struct stpmu1_onkey *onkey; + struct pmic_onkey_config config; + unsigned int val = 0; + int ret; + + onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL); + if (!onkey) + return -ENOMEM; + + memset(&config, 0, sizeof(struct pmic_onkey_config)); + ret = stpmu1_onkey_dt_params(pdev, onkey, &config); + if (ret < 0) + goto err; + + input_dev = devm_input_allocate_device(dev); + if (!input_dev) { + dev_err(dev, "Can't allocate Pwr Onkey Input Device\n"); + ret = -ENOMEM; + goto err; + } + + input_dev->name = "pmic_onkey"; + input_dev->phys = "pmic_onkey/input0"; + input_dev->dev.parent = dev; + + input_set_capability(input_dev, EV_KEY, KEY_POWER); + + /* Setup Power Onkey Hardware parameters (long key press)*/ + val = (config.long_press_time_val & PONKEY_TURNOFF_TIMER_MASK); + if (config.turnoff_enabled) + val |= PONKEY_PWR_OFF; + if (config.cc_flag_clear) + val |= PONKEY_CC_FLAG_CLEAR; + ret = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR, + PONKEY_TURNOFF_MASK, val); + if (ret) { + dev_err(dev, "LONG_PRESS_KEY_UPDATE failed: %d\n", ret); + goto err; + } + + ret = regmap_update_bits(pmic->regmap, PADS_PULL_CR, + PONKEY_PU_ACTIVE, + config.onkey_pullup_val); + + if (ret) { + dev_err(dev, "ONKEY Pads configuration failed: %d\n", ret); + goto err; + } + + onkey->pmic = pmic; + onkey->input_dev = input_dev; + + ret = devm_request_threaded_irq(dev, onkey->irq_falling, NULL, + onkey_falling_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), onkey); + if (ret) { + dev_err(dev, "Can't get IRQ for Onkey Falling edge: %d\n", ret); + goto err; + } + + ret = devm_request_threaded_irq(dev, onkey->irq_rising, NULL, + onkey_rising_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), onkey); + if (ret) { + dev_err(dev, "Can't get IRQ for Onkey Rising edge: %d\n", ret); + goto err; + } + + ret = input_register_device(input_dev); + if (ret) { + dev_err(dev, "Can't register power button: %d\n", ret); + goto err; + } + + platform_set_drvdata(pdev, onkey); + device_init_wakeup(dev, true); + + dev_dbg(dev, "PMIC Pwr Onkey driver probed\n"); + +err: + return ret; +} + +/** + * stpmu1_onkey_remove() - Cleanup on removal + * @pdev: platform device for the button + * + * Return: 0 + */ +static int stpmu1_onkey_remove(struct platform_device *pdev) +{ + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + input_unregister_device(onkey->input_dev); + return 0; +} + +#ifdef CONFIG_PM_SLEEP + +/** + * pmic_onkey_suspend() - suspend handler + * @dev: power button device + * + * Cancel all pending work items for the power button, setup irq for wakeup + * + * Return: 0 + */ +static int __maybe_unused stpmu1_onkey_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + if (device_may_wakeup(dev)) { + enable_irq_wake(onkey->irq_falling); + enable_irq_wake(onkey->irq_rising); + } + return 0; +} + +/** + * pmic_onkey_resume() - resume handler + * @dev: power button device + * + * Just disable the wakeup capability of irq here. + * + * Return: 0 + */ +static int __maybe_unused stpmu1_onkey_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + if (device_may_wakeup(dev)) { + disable_irq_wake(onkey->irq_falling); + disable_irq_wake(onkey->irq_rising); + } + return 0; +} + +#endif + +static SIMPLE_DEV_PM_OPS(stpmu1_onkey_pm, + stpmu1_onkey_suspend, + stpmu1_onkey_resume); + +static const struct of_device_id of_stpmu1_onkey_match[] = { + { .compatible = "st,stpmu1-onkey" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, of_stpmu1_onkey_match); + +static struct platform_driver stpmu1_onkey_driver = { + .probe = stpmu1_onkey_probe, + .remove = stpmu1_onkey_remove, + .driver = { + .name = "stpmu1_onkey", + .of_match_table = of_match_ptr(of_stpmu1_onkey_match), + .pm = &stpmu1_onkey_pm, + }, +}; +module_platform_driver(stpmu1_onkey_driver); + +MODULE_DESCRIPTION("Onkey driver for STPMU1"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("philippe.peurichard@st.com>");