From patchwork Thu Nov 20 13:31:39 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaewon Kim X-Patchwork-Id: 5348311 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id ECDD6C11AC for ; Thu, 20 Nov 2014 13:33:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B23162021B for ; Thu, 20 Nov 2014 13:33:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71FD0201E4 for ; Thu, 20 Nov 2014 13:33:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757665AbaKTNcp (ORCPT ); Thu, 20 Nov 2014 08:32:45 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:19269 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751103AbaKTNcY (ORCPT ); Thu, 20 Nov 2014 08:32:24 -0500 Received: from epcpsbgr2.samsung.com (u142.gpu120.samsung.co.kr [203.254.230.142]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NFC00LSZAXYFV90@mailout4.samsung.com>; Thu, 20 Nov 2014 22:32:22 +0900 (KST) Received: from epcpsbgm1.samsung.com ( [172.20.52.112]) by epcpsbgr2.samsung.com (EPCPMTA) with SMTP id D4.F3.11124.66DED645; Thu, 20 Nov 2014 22:32:22 +0900 (KST) X-AuditID: cbfee68e-f79b46d000002b74-c6-546ded66be12 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id AF.B6.20081.66DED645; Thu, 20 Nov 2014 22:32:22 +0900 (KST) Received: from localhost.localdomain ([10.252.83.201]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NFC00DNHAXV1HS0@mmp2.samsung.com>; Thu, 20 Nov 2014 22:32:22 +0900 (KST) From: Jaewon Kim To: Kukjin Kim , Dmitry Torokhov Cc: Chanwoo Choi , linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Jaewon Kim , Hyunhee Kim Subject: [PATCH 1/2] Input: add regulator haptic driver Date: Thu, 20 Nov 2014 22:31:39 +0900 Message-id: <1416490300-28865-2-git-send-email-jaewon02.kim@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1416490300-28865-1-git-send-email-jaewon02.kim@samsung.com> References: <1416490300-28865-1-git-send-email-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrCLMWRmVeSWpSXmKPExsWyRsSkQDftbW6IwaejGhbXvzxntTi86AWj xecPLewWOxqOsFr0LrjKZnHz0zdWi8u75rBZzDi/j8mBw2PnrLvsHn1bVjF6fN4kF8AcxWWT kpqTWZZapG+XwJXRfv8tS8Fvn4rbzzwaGHc5dDFyckgImEgsv3yBCcIWk7hwbz1bFyMXh5DA UkaJ3U8mMcIUPfrbwQxiCwlMZ5SYukcCoqiNSeL7t/MsIAk2AW2J7+sXs4LYIgKhEr2vP7OD 2MwCNxglJuxJBrGFBcwlVk6bCbaNRUBV4vP7NrAFvAIeEp0P24HmcAAtU5CYM8kGJMwp4CnR //4VI8ReD4kFa86xgOyVEOhnl+hueA01R0Di2+RDUL2yEpsOMEPcLClxcMUNlgmMwgsYGVYx iqYWJBcUJ6UXGekVJ+YWl+al6yXn525iBAb26X/P+nYw3jxgfYhRgINRiYc3wSI3RIg1say4 MvcQoynQhonMUqLJ+cD4ySuJNzQ2M7IwNTE1NjK3NFMS502Q+hksJJCeWJKanZpakFoUX1Sa k1p8iJGJg1OqgVHrWI8+M0tv2v6EohNPvaKcjZ94nOKO+dTxuyg57o3mh+rcXIF8n0OzKm9Y vtvXyhJ33fDsZ/GcH/es7hrcZjZ81dSSdc2ee88xzScdrh8udCxy8rl1cdPSxZxHCg5a3FLZ fiXmro+o6Iz9dsp1gfekDr75Y35MoHaN/iWF61dnsTtxuMaWzVFiKc5INNRiLipOBAA+ebu8 ZwIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprHIsWRmVeSWpSXmKPExsVy+t9jQd20t7khBvc75Cyuf3nOanF40QtG i88fWtgtdjQcYbXoXXCVzeLmp2+sFpd3zWGzmHF+H5MDh8fOWXfZPfq2rGL0+LxJLoA5qoHR JiM1MSW1SCE1Lzk/JTMv3VbJOzjeOd7UzMBQ19DSwlxJIS8xN9VWycUnQNctMwfoBCWFssSc UqBQQGJxsZK+HaYJoSFuuhYwjRG6viFBcD1GBmggYQ1jRvv9tywFv30qbj/zaGDc5dDFyMkh IWAi8ehvBzOELSZx4d56NhBbSGA6o8TUPRJdjFxAdhuTxPdv51lAEmwC2hLf1y9mBbFFBEIl el9/ZgexmQVuMEpM2JMMYgsLmEusnDaTCcRmEVCV+Py+jRHE5hXwkOh82A40hwNomYLEnEk2 IGFOAU+J/vevGCH2ekgsWHOOZQIj7wJGhlWMoqkFyQXFSem5hnrFibnFpXnpesn5uZsYwXHz TGoH48oGi0OMAhyMSjy8CRa5IUKsiWXFlbmHGCU4mJVEeDV2AoV4UxIrq1KL8uOLSnNSiw8x mgIdNZFZSjQ5HxjTeSXxhsYmZkaWRuaGFkbG5krivDduAjUJpCeWpGanphakFsH0MXFwSjUw Oikk/dyztftj7AHTI3FF3Jzxq7Lfmu+JqGDwyDh1q9zd5/bsLB+x8yeE5mgZpPY8OvqCU134 S9mktBtf2ssM/vTpTq6ZO21Ff3DdklZB3fStzuvySzRfHy9m7faPr/L4bPCKTyJSfZKGrsVz j8uhbIWuddFbWbYf29+YV6HKKPisVnGjj40SS3FGoqEWc1FxIgAFAmy5sQIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for haptic driver controlled by voltage of regulator. And this driver support for Force Feedback interface from input framework Signed-off-by: Jaewon Kim Signed-off-by: Hyunhee Kim Acked-by: Kyungmin Park --- .../devicetree/bindings/input/regulator-haptic.txt | 24 ++ drivers/input/misc/Kconfig | 11 + drivers/input/misc/Makefile | 1 + drivers/input/misc/regulator-haptic.c | 241 ++++++++++++++++++++ 4 files changed, 277 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt create mode 100644 drivers/input/misc/regulator-haptic.c diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt new file mode 100644 index 0000000..9f60e17 --- /dev/null +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt @@ -0,0 +1,24 @@ +* Requlator Haptic Device Tree Bindings + +The regulator haptic driver controlled by voltage of regulator. +This driver implemented via Force Feedback interface. + +Required Properties: + - compatible : Should be "regulator-haptic" + - haptic-supply : Power supply for the haptic motor. + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt + + - max-microvolt : The maximum voltage value supplied to haptic motor. + [The unit of the voltage is a micro] + + - min-microvolt : The minimum voltage value in which haptic motor reacts. + [The unit of the voltage is a micro] + +Example: + + regulator-haptic { + compatible = "regulator-haptic"; + haptic-supply = <&motor_regulator>; + max-microvolt = <2700000>; + min-microvolt = <1100000>; + }; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 23297ab..e5e556d 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -394,6 +394,17 @@ config INPUT_CM109 To compile this driver as a module, choose M here: the module will be called cm109. +config INPUT_REGULATOR_HAPTIC + tristate "regulator haptics support" + select INPUT_FF_MEMLESS + help + This option enables device driver support for the haptic controlled + by regulator. This driver supports ff-memless interface + from input framework. + + To compile this driver as a module, choose M here: the + module will be called regulator-haptic. + config INPUT_RETU_PWRBUTTON tristate "Retu Power button Driver" depends on MFD_RETU diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 19c7603..1f135af 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -53,6 +53,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o +obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o diff --git a/drivers/input/misc/regulator-haptic.c b/drivers/input/misc/regulator-haptic.c new file mode 100644 index 0000000..1a83ecb --- /dev/null +++ b/drivers/input/misc/regulator-haptic.c @@ -0,0 +1,241 @@ +/* + * Regulator haptic driver + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Author: Jaewon Kim + * Author: Hyunhee Kim + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include + +#define MAX_MAGNITUDE_SHIFT 16 + +struct regulator_haptic { + struct device *dev; + struct input_dev *input_dev; + struct regulator *regulator; + struct work_struct work; + + bool enabled; + bool suspend_state; + unsigned int max_volt; + unsigned int min_volt; + unsigned int intensity; + unsigned int magnitude; +}; + +static void regulator_haptic_enable(struct regulator_haptic *haptic) +{ + int error; + + if (haptic->enabled) + return; + + error = regulator_enable(haptic->regulator); + if (error) { + dev_err(haptic->dev, "cannot enable regulator\n"); + return; + } + + haptic->enabled = true; +} + +static void regulator_haptic_disable(struct regulator_haptic *haptic) +{ + int error; + + if (!haptic->enabled) + return; + + error = regulator_disable(haptic->regulator); + if (error) { + dev_err(haptic->dev, "cannot disable regulator\n"); + return; + } + + haptic->enabled = false; +} + +static void regulator_haptic_work(struct work_struct *work) +{ + struct regulator_haptic *haptic = container_of(work, + struct regulator_haptic, work); + int error; + + error = regulator_set_voltage(haptic->regulator, + haptic->intensity + haptic->min_volt, haptic->max_volt); + if (error) { + dev_err(haptic->dev, "cannot set regulator voltage\n"); + return; + } + + if (haptic->magnitude) + regulator_haptic_enable(haptic); + else + regulator_haptic_disable(haptic); +} + +static int regulator_haptic_play_effect(struct input_dev *input, void *data, + struct ff_effect *effect) +{ + struct regulator_haptic *haptic = input_get_drvdata(input); + u64 volt_mag_multi; + + haptic->magnitude = effect->u.rumble.strong_magnitude; + if (!haptic->magnitude) + haptic->magnitude = effect->u.rumble.weak_magnitude; + + + volt_mag_multi = (u64)(haptic->max_volt - haptic->min_volt) * + haptic->magnitude; + haptic->intensity = (unsigned int)(volt_mag_multi >> + MAX_MAGNITUDE_SHIFT); + + schedule_work(&haptic->work); + + return 0; +} + +static void regulator_haptic_close(struct input_dev *input) +{ + struct regulator_haptic *haptic = input_get_drvdata(input); + + cancel_work_sync(&haptic->work); + regulator_haptic_disable(haptic); +} + +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) +{ + struct device_node *node = haptic->dev->of_node; + int error; + + error = of_property_read_u32(node, "max-microvolt", &haptic->max_volt); + if (error) { + dev_err(haptic->dev, "cannot parse max-microvolt\n"); + return error; + } + + error = of_property_read_u32(node, "min-microvolt", &haptic->min_volt); + if (error) { + dev_err(haptic->dev, "cannot parse min-microvolt\n"); + return error; + } + + return 0; +} + +static int regulator_haptic_probe(struct platform_device *pdev) +{ + struct regulator_haptic *haptic; + struct input_dev *input_dev; + int error; + + haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL); + if (!haptic) + return -ENOMEM; + + haptic->dev = &pdev->dev; + haptic->enabled = false; + haptic->suspend_state = false; + INIT_WORK(&haptic->work, regulator_haptic_work); + + error = regulator_haptic_parse_dt(haptic); + if (error) { + dev_err(&pdev->dev, "failed to parse device tree\n"); + return error; + } + + haptic->regulator = devm_regulator_get(&pdev->dev, "haptic"); + if (IS_ERR(haptic->regulator)) { + dev_err(&pdev->dev, "failed to get regulator\n"); + return PTR_ERR(haptic->regulator); + } + + input_dev = devm_input_allocate_device(&pdev->dev); + if (!input_dev) + return -ENOMEM; + + haptic->input_dev = input_dev; + haptic->input_dev->name = "regulator-haptic"; + haptic->input_dev->dev.parent = &pdev->dev; + haptic->input_dev->close = regulator_haptic_close; + input_set_drvdata(haptic->input_dev, haptic); + input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE); + + error = input_ff_create_memless(input_dev, NULL, + regulator_haptic_play_effect); + if (error) { + dev_err(&pdev->dev, "failed to create force-feedback\n"); + return error; + } + + error = input_register_device(haptic->input_dev); + if (error) { + dev_err(&pdev->dev, "failed to register input device\n"); + return error; + } + + platform_set_drvdata(pdev, haptic); + + return 0; +} + +static int __maybe_unused regulator_haptic_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct regulator_haptic *haptic = platform_get_drvdata(pdev); + + if (haptic->enabled) { + regulator_haptic_disable(haptic); + haptic->suspend_state = true; + } + + return 0; +} + +static int __maybe_unused regulator_haptic_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct regulator_haptic *haptic = platform_get_drvdata(pdev); + + if (haptic->enabled) { + regulator_haptic_enable(haptic); + haptic->suspend_state = false; + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(regulator_haptic_pm_ops, + regulator_haptic_suspend, regulator_haptic_resume); + +static struct of_device_id regulator_haptic_dt_match[] = { + { .compatible = "regulator-haptic" }, + {}, +}; + +static struct platform_driver regulator_haptic_driver = { + .probe = regulator_haptic_probe, + .driver = { + .name = "regulator-haptic", + .owner = THIS_MODULE, + .of_match_table = regulator_haptic_dt_match, + .pm = ®ulator_haptic_pm_ops, + }, +}; +module_platform_driver(regulator_haptic_driver); + +MODULE_AUTHOR("Jaewon Kim "); +MODULE_AUTHOR("Hyunhee Kim "); +MODULE_ALIAS("platform:regulator-haptic"); +MODULE_DESCRIPTION("Regulator haptic driver"); +MODULE_LICENSE("GPL");