Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758586Ab2JKKeM (ORCPT ); Thu, 11 Oct 2012 06:34:12 -0400 Received: from va3ehsobe002.messaging.microsoft.com ([216.32.180.12]:42014 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758495Ab2JKKeH (ORCPT ); Thu, 11 Oct 2012 06:34:07 -0400 X-Forefront-Antispam-Report: CIP:59.163.77.45;KIP:(null);UIP:(null);IPV:NLI;H:KCHJEXHC01.kpit.com;RD:59.163.77.45.static.vsnl.net.in;EFVD:NLI X-SpamScore: 4 X-BigFish: VPS4(zzc8kzz1202h1d1ah1d2ahzz8275bhz2dh2a8h668h839h93fhd24hd2bhf0ah107ah1288h12a5h12a9h12bdh137ah139eh13b6h1441hbe9i1155h) Subject: [Patch v3 7/7] Onkey: DA9055 Onkey driver From: Ashish Jangam To: Liam Girdwood CC: Samuel Ortiz , , David Dajun Chen , Content-Type: text/plain; charset="UTF-8" Date: Thu, 11 Oct 2012 16:15:16 +0530 Message-ID: <1349952316.9228.7.camel@dhruva> MIME-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.10.38.47] X-OriginatorOrg: kpitcummins.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6675 Lines: 236 This is the ONKEY driver of the Dialog DA9055 PMIC and depends on the DA9055 MFD core driver. This patch is functionally tested on SMDK6410 board. Signed-off-by: David Dajun Chen Signed-off-by: Ashish Jangam --- changes since v3: - used of module_platform_driver macro - add regmap virtual irq function changes since v2: - add support for button release - use of devm_request_threaded_irq API --- drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/da9055_onkey.c | 167 +++++++++++++++++++++++++++++++++++++ 3 files changed, 178 insertions(+), 0 deletions(-) create mode 100644 drivers/input/misc/da9055_onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 7c0f1ec..6a45cb8 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -486,6 +486,16 @@ config INPUT_DA9052_ONKEY To compile this driver as a module, choose M here: the module will be called da9052_onkey. +config INPUT_DA9055_ONKEY + tristate "Dialog Semiconductor DA9055 ONKEY" + depends on MFD_DA9055 + help + Support the ONKEY of DA9055 PMICs as an input device + reporting power button status. + + To compile this driver as a module, choose M here: the module + will be called da9055_onkey. + config INPUT_DM355EVM tristate "TI DaVinci DM355 EVM Keypad and IR Remote" depends on MFD_DM355EVM_MSP diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 83fe6f5..23347e3 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o +obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o diff --git a/drivers/input/misc/da9055_onkey.c b/drivers/input/misc/da9055_onkey.c new file mode 100644 index 0000000..2addd6d --- /dev/null +++ b/drivers/input/misc/da9055_onkey.c @@ -0,0 +1,167 @@ +/* + * ON pin driver for Dialog DA9055 PMICs + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include + +#include +#include + +struct da9055_onkey { + struct da9055 *da9055; + struct input_dev *input; + struct delayed_work work; +}; + +static void da9055_onkey_query(struct da9055_onkey *onkey) +{ + int key_stat; + + key_stat = da9055_reg_read(onkey->da9055, DA9055_REG_STATUS_A); + if (key_stat < 0) { + dev_err(onkey->da9055->dev, + "Failed to read onkey event %d\n", key_stat); + } else { + key_stat &= DA9055_NOKEY_STS; + /* + * Onkey status bit is cleared when onkey button is relased. + */ + if (!key_stat) { + input_report_key(onkey->input, KEY_POWER, 0); + input_sync(onkey->input); + } + } + + /* + * Interrupt is generated only when the ONKEY pin is asserted. + * Hence the deassertion of the pin is simulated through work queue. + */ + if (key_stat) + schedule_delayed_work(&onkey->work, msecs_to_jiffies(10)); + +} + +static void da9055_onkey_work(struct work_struct *work) +{ + struct da9055_onkey *onkey = container_of(work, struct da9055_onkey, + work.work); + + da9055_onkey_query(onkey); +} + +static irqreturn_t da9055_onkey_irq(int irq, void *data) +{ + struct da9055_onkey *onkey = data; + + input_report_key(onkey->input, KEY_POWER, 1); + input_sync(onkey->input); + + da9055_onkey_query(onkey); + + return IRQ_HANDLED; +} + +static int __devinit da9055_onkey_probe(struct platform_device *pdev) +{ + struct input_dev *input_dev; + struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent); + struct da9055_onkey *onkey; + int irq, err; + + irq = platform_get_irq_byname(pdev, "ONKEY"); + if (irq < 0) { + dev_err(&pdev->dev, + "Failed to get an IRQ for input device, %d\n", irq); + return -EINVAL; + } + + onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL); + if (!onkey) { + dev_err(&pdev->dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + input_dev = input_allocate_device(); + if (!input_dev) { + dev_err(&pdev->dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + onkey->input = input_dev; + onkey->da9055 = da9055; + input_dev->name = "da9055-onkey"; + input_dev->phys = "da9055-onkey/input0"; + input_dev->dev.parent = &pdev->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY); + __set_bit(KEY_POWER, input_dev->keybit); + + INIT_DELAYED_WORK(&onkey->work, da9055_onkey_work); + + irq = regmap_irq_get_virq(da9055->irq_data, irq); + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, da9055_onkey_irq, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "ONKEY", onkey); + if (err < 0) { + dev_err(&pdev->dev, + "Failed to register ONKEY IRQ %d, error = %d\n", + irq, err); + goto free_onkey; + } + + err = input_register_device(input_dev); + if (err) { + dev_err(&pdev->dev, "Unable to register input device, %d\n", + err); + goto free_irq; + } + + platform_set_drvdata(pdev, onkey); + + return 0; + +free_irq: +free_onkey: + cancel_delayed_work_sync(&onkey->work); + input_free_device(input_dev); + + return err; +} + +static int __devexit da9055_onkey_remove(struct platform_device *pdev) +{ + struct da9055_onkey *onkey = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&onkey->work); + input_unregister_device(onkey->input); + + return 0; +} + +static struct platform_driver da9055_onkey_driver = { + .probe = da9055_onkey_probe, + .remove = __devexit_p(da9055_onkey_remove), + .driver = { + .name = "da9055-onkey", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9055_onkey_driver); + +MODULE_AUTHOR("David Dajun Chen "); +MODULE_DESCRIPTION("Onkey driver for DA9055"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9055-onkey"); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/