From patchwork Sat Jan 24 00:19:06 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 5698351 Return-Path: X-Original-To: patchwork-linux-arm-msm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A4F809F2ED for ; Sat, 24 Jan 2015 00:20:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 71AB320340 for ; Sat, 24 Jan 2015 00:20:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 844D9202F0 for ; Sat, 24 Jan 2015 00:20:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756234AbbAXAUH (ORCPT ); Fri, 23 Jan 2015 19:20:07 -0500 Received: from seldrel01.sonyericsson.com ([212.209.106.2]:1742 "EHLO seldrel01.sonyericsson.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754617AbbAXATR (ORCPT ); Fri, 23 Jan 2015 19:19:17 -0500 From: Bjorn Andersson To: Dmitry Torokhov , Rob Herring CC: Pawel Moll , Mark Rutland , Ian Campbell , Grant Likely , , , , , Courtney Cavin Subject: [PATCH v2 1/2] input: Add Qualcomm PM8941 power key driver Date: Fri, 23 Jan 2015 16:19:06 -0800 Message-ID: <1422058747-13486-2-git-send-email-bjorn.andersson@sonymobile.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1422058747-13486-1-git-send-email-bjorn.andersson@sonymobile.com> References: <1422058747-13486-1-git-send-email-bjorn.andersson@sonymobile.com> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 From: Courtney Cavin Signed-off-by: Courtney Cavin Signed-off-by: Bjorn Andersson --- drivers/input/misc/Kconfig | 12 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/pm8941-pwrkey.c | 281 +++++++++++++++++++++++++++++++++++++ 3 files changed, 294 insertions(+) create mode 100644 drivers/input/misc/pm8941-pwrkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 23297ab..3306592 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -105,6 +105,18 @@ config INPUT_PCSPKR To compile this driver as a module, choose M here: the module will be called pcspkr. +config INPUT_PM8941_PWRKEY + tristate "Qualcomm PM8941 power key support" + depends on MFD_SPMI_PMIC + help + Say Y here if you want support for the power key usually found + on boards using a Qualcomm PM8941 compatible PMIC. + + If unsure, say Y. + + To compile this driver as a module, choose M here: the module + will be called pm8941-pwrkey. + config INPUT_PM8XXX_VIBRATOR tristate "Qualcomm PM8XXX vibrator support" depends on MFD_PM8XXX diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 19c7603..c44f6c2 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o obj-$(CONFIG_INPUT_PCF8574) += pcf8574_keypad.o obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o +obj-$(CONFIG_INPUT_PM8941_PWRKEY) += pm8941-pwrkey.o obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR) += pm8xxx-vibrator.o obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c new file mode 100644 index 0000000..bc7ba8f --- /dev/null +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -0,0 +1,281 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * Copyright (c) 2014, Sony Mobile Communications Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PON_REV2 0x01 + +#define PON_RT_STS 0x10 +#define PON_KPDPWR_N_SET BIT(0) + +#define PON_PS_HOLD_RST_CTL 0x5a +#define PON_PS_HOLD_RST_CTL2 0x5b +#define PON_PS_HOLD_ENABLE BIT(7) +#define PON_PS_HOLD_TYPE_MASK 0x0f +#define PON_PS_HOLD_TYPE_SHUTDOWN 4 +#define PON_PS_HOLD_TYPE_HARD_RESET 7 + +#define PON_PULL_CTL 0x70 +#define PON_KPDPWR_PULL_UP BIT(1) + +#define PON_DBC_CTL 0x71 +#define PON_DBC_DELAY_MASK 0x7 + + +struct pm8941_pwrkey { + struct device *dev; + int irq; + u32 baseaddr; + struct regmap *regmap; + struct input_dev *input; + + unsigned int revision; + struct notifier_block reboot_notifier; +}; + +static int pm8941_reboot_notify(struct notifier_block *nb, + unsigned long code, void *unused) +{ + struct pm8941_pwrkey *pwrkey = container_of(nb, struct pm8941_pwrkey, + reboot_notifier); + unsigned int enable_reg; + unsigned int reset_type; + int rc; + + /* PMICs with revision 0 have the enable bit in same register as ctrl */ + if (pwrkey->revision == 0) + enable_reg = PON_PS_HOLD_RST_CTL; + else + enable_reg = PON_PS_HOLD_RST_CTL2; + + rc = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + enable_reg, + PON_PS_HOLD_ENABLE, 0); + if (rc) + dev_err(pwrkey->dev, "unable to clear ps hold reset enable\n"); + + /* + * Updates of PON_PS_HOLD_ENABLE requires 3 sleep cycles between + * writes. + */ + usleep_range(100, 1000); + + switch (code) { + case SYS_HALT: + case SYS_POWER_OFF: + reset_type = PON_PS_HOLD_TYPE_SHUTDOWN; + break; + case SYS_RESTART: + default: + reset_type = PON_PS_HOLD_TYPE_HARD_RESET; + break; + }; + + rc = regmap_update_bits(pwrkey->regmap, + pwrkey->baseaddr + PON_PS_HOLD_RST_CTL, + PON_PS_HOLD_TYPE_MASK, reset_type); + if (rc) + dev_err(pwrkey->dev, "unable to set ps hold reset type\n"); + + rc = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + enable_reg, + PON_PS_HOLD_ENABLE, PON_PS_HOLD_ENABLE); + if (rc) + dev_err(pwrkey->dev, "unable to re-set enable\n"); + + return NOTIFY_DONE; +} + +static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data) +{ + struct pm8941_pwrkey *pwrkey = _data; + unsigned int sts; + int rc; + + rc = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_RT_STS, &sts); + if (rc) + return IRQ_HANDLED; + + input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET)); + input_sync(pwrkey->input); + + return IRQ_HANDLED; +} + +#ifdef CONFIG_PM_SLEEP +static int pm8941_pwrkey_suspend(struct device *dev) +{ + struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(pwrkey->irq); + + return 0; +} + +static int pm8941_pwrkey_resume(struct device *dev) +{ + struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(pwrkey->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops, + pm8941_pwrkey_suspend, pm8941_pwrkey_resume); + +static int pm8941_pwrkey_probe(struct platform_device *pdev) +{ + struct pm8941_pwrkey *pwrkey; + bool pull_up; + u32 req_delay; + int rc; + + if (of_property_read_u32(pdev->dev.of_node, "debounce", &req_delay)) + req_delay = 15625; + + if (req_delay > 2000000 || req_delay == 0) { + dev_err(&pdev->dev, "invalid debounce time: %u\n", req_delay); + return -EINVAL; + } + + pull_up = of_property_read_bool(pdev->dev.of_node, "bias-pull-up"); + + pwrkey = devm_kzalloc(&pdev->dev, sizeof(*pwrkey), GFP_KERNEL); + if (!pwrkey) + return -ENOMEM; + + pwrkey->dev = &pdev->dev; + + pwrkey->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!pwrkey->regmap) { + dev_err(&pdev->dev, "failed to locate regmap\n"); + return -ENODEV; + } + + pwrkey->irq = platform_get_irq(pdev, 0); + if (pwrkey->irq < 0) { + dev_err(&pdev->dev, "failed to get irq\n"); + return pwrkey->irq; + } + + rc = of_property_read_u32(pdev->dev.of_node, "reg", &pwrkey->baseaddr); + if (rc) + return rc; + + rc = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2, + &pwrkey->revision); + if (rc) { + dev_err(&pdev->dev, "failed to set debounce: %d\n", rc); + return rc; + } + + pwrkey->input = devm_input_allocate_device(&pdev->dev); + if (!pwrkey->input) { + dev_dbg(&pdev->dev, "unable to allocate input device\n"); + return -ENOMEM; + } + + input_set_capability(pwrkey->input, EV_KEY, KEY_POWER); + + pwrkey->input->name = "pm8941_pwrkey"; + pwrkey->input->phys = "pm8941_pwrkey/input0"; + + req_delay = (req_delay << 6) / USEC_PER_SEC; + req_delay = ilog2(req_delay); + + rc = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + PON_DBC_CTL, + PON_DBC_DELAY_MASK, req_delay); + if (rc) { + dev_err(&pdev->dev, "failed to set debounce: %d\n", rc); + return rc; + } + + rc = regmap_update_bits(pwrkey->regmap, + pwrkey->baseaddr + PON_PULL_CTL, PON_KPDPWR_PULL_UP, + pull_up ? PON_KPDPWR_PULL_UP : 0); + if (rc) { + dev_err(&pdev->dev, "failed to set pull: %d\n", rc); + return rc; + } + + rc = devm_request_threaded_irq(&pdev->dev, pwrkey->irq, + NULL, pm8941_pwrkey_irq, + IRQF_ONESHOT, + "pm8941_pwrkey", pwrkey); + if (rc) { + dev_err(&pdev->dev, "failed requesting IRQ: %d\n", rc); + return rc; + } + + rc = input_register_device(pwrkey->input); + if (rc) { + dev_err(&pdev->dev, "failed to register input device: %d\n", + rc); + return rc; + } + + pwrkey->reboot_notifier.notifier_call = pm8941_reboot_notify, + rc = register_reboot_notifier(&pwrkey->reboot_notifier); + if (rc) { + dev_err(&pdev->dev, "failed to register reboot notifier: %d\n", + rc); + return rc; + } + + platform_set_drvdata(pdev, pwrkey); + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int pm8941_pwrkey_remove(struct platform_device *pdev) +{ + struct pm8941_pwrkey *pwrkey = platform_get_drvdata(pdev); + + device_init_wakeup(&pdev->dev, 0); + unregister_reboot_notifier(&pwrkey->reboot_notifier); + + return 0; +} + +static const struct of_device_id pm8941_pwr_key_id_table[] = { + { .compatible = "qcom,pm8941-pwrkey" }, + { } +}; +MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table); + +static struct platform_driver pm8941_pwrkey_driver = { + .probe = pm8941_pwrkey_probe, + .remove = pm8941_pwrkey_remove, + .driver = { + .name = "pm8941-pwrkey", + .pm = &pm8941_pwr_key_pm_ops, + .of_match_table = of_match_ptr(pm8941_pwr_key_id_table), + }, +}; +module_platform_driver(pm8941_pwrkey_driver); + +MODULE_DESCRIPTION("PM8941 Power Key driver"); +MODULE_LICENSE("GPL v2");