[1/2] input: Add Qualcomm PM8941 power key driver

Message ID	1412644321-27683-2-git-send-email-bjorn.andersson@sonymobile.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-input-owner@kernel.org> From: Bjorn Andersson <bjorn.andersson@sonymobile.com> To: Dmitry Torokhov <dmitry.torokhov@gmail.com>, Rob Herring <robh+dt@kernel.org> CC: Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Grant Likely <grant.likely@linaro.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-input@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>, Courtney Cavin <courtney.cavin@sonymobile.com> Subject: [PATCH 1/2] input: Add Qualcomm PM8941 power key driver Date: Mon, 6 Oct 2014 18:12:00 -0700 Message-ID: <1412644321-27683-2-git-send-email-bjorn.andersson@sonymobile.com> In-Reply-To: <1412644321-27683-1-git-send-email-bjorn.andersson@sonymobile.com> References: <1412644321-27683-1-git-send-email-bjorn.andersson@sonymobile.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-input-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 2ff4425..abe615c 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 PM8X41 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 4955ad3..e4ab02c 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -44,6 +44,7 @@ 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..58df8bc --- /dev/null +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -0,0 +1,196 @@ +/* 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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/log2.h> +#include <linux/of.h> + +#define PON_RT_STS 0x10 +#define PON_PULL_CTL 0x70 +#define PON_DBC_CTL 0x71 + +#define PON_DBC_DELAY_MASK 0x7 +#define PON_KPDPWR_N_SET BIT(0) +#define PON_KPDPWR_PULL_UP BIT(1) + +struct pm8941_pwrkey { + int irq; + u32 baseaddr; + struct regmap *regmap; + struct input_dev *input; +}; + +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->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; + + 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_TRIGGER_RISING | IRQF_TRIGGER_FALLING | + 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; + } + + platform_set_drvdata(pdev, pwrkey); + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int pm8941_pwrkey_remove(struct platform_device *pdev) +{ + device_init_wakeup(&pdev->dev, 0); + + 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", + .owner = THIS_MODULE, + .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");

[1/2] input: Add Qualcomm PM8941 power key driver

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