| Message ID | ce5a43ad4c028b1553206ee51a27822a614f3404.1394195865.git.stwiss.opensource@diasemi.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Steve, On Fri, Mar 07, 2014 at 12:37:45PM +0000, Opensource [Steve Twiss] wrote: > From: Opensource [Steve Twiss] <stwiss.opensource@diasemi.com> > > Add the OnKey driver for DA9063. > > > Signed-off-by: Opensource [Steve Twiss] <stwiss.opensource@diasemi.com> > --- > Checks performed with next-20140307/scripts/checkpatch.pl > da9063-onkey.c total: 0 errors, 0 warnings, 202 lines checked > Kconfig total: 0 errors, 11 warnings, 679 lines checked > Makefile total: 0 errors, 0 warnings, 66 lines checked > > Hello, > > This is a RFC for the Dialog DA9063 Onkey driver. > > Dependencies: > > This driver makes use of the name field "ONKEY" as part of the > function call: platform_get_irq_byname(); > > This driver is therefore dependent on this change to the name field > in the properties of the the OnKey IORESOURCE_IRQ resource structure > (part of the mfd_cell Onkey resource inside da9063-core.c). This > change will be added as part of the final set when I submit all patches > as a single PATCH set. > > This patch applies against kernel version linux-next next-20140307 > > Regards, > Steve Twiss, Dialog Semiconductor Ltd. > > > > drivers/input/misc/Kconfig | 10 ++ > drivers/input/misc/Makefile | 1 + > drivers/input/misc/da9063-onkey.c | 202 +++++++++++++++++++++++++++++++++++++ > 3 files changed, 213 insertions(+) > create mode 100644 drivers/input/misc/da9063-onkey.c > > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig > index 762e6d2..3deb008 100644 > --- a/drivers/input/misc/Kconfig > +++ b/drivers/input/misc/Kconfig > @@ -522,6 +522,16 @@ config INPUT_DA9055_ONKEY > To compile this driver as a module, choose M here: the module > will be called da9055_onkey. > > +config INPUT_DA9063_ONKEY > + tristate "Dialog DA9063 OnKey" > + depends on MFD_DA9063 > + help > + Support the ONKEY of Dialog DA9063 Power Management IC as an > + input device reporting power button statue. > + > + To compile this driver as a module, choose M here: the module > + will be called da9063-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 cda71fc..f40caa7 100644 > --- a/drivers/input/misc/Makefile > +++ b/drivers/input/misc/Makefile > @@ -25,6 +25,7 @@ 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-$(CONFIG_INPUT_DA9063_ONKEY) += da9063-onkey.o > obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o > obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o > obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o > diff --git a/drivers/input/misc/da9063-onkey.c b/drivers/input/misc/da9063-onkey.c > new file mode 100644 > index 0000000..654f52b > --- /dev/null > +++ b/drivers/input/misc/da9063-onkey.c > @@ -0,0 +1,202 @@ > +/* da9063-onkey.c - Onkey device driver for DA9063 > + * Copyright (C) 2013 Dialog Semiconductor Ltd. > + * > + * This library is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Library General Public > + * License as published by the Free Software Foundation; either > + * version 2 of the License, or (at your option) any later version. > + * > + * This library 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 > + * Library General Public License for more details. > + */ > + > +#include <linux/module.h> > +#include <linux/errno.h> > +#include <linux/input.h> > +#include <linux/interrupt.h> > +#include <linux/platform_device.h> > +#include <linux/workqueue.h> > +#include <linux/regmap.h> > + > +#include <linux/mfd/da9063/core.h> > +#include <linux/mfd/da9063/pdata.h> > +#include <linux/mfd/da9063/registers.h> > + > +struct da9063_onkey { > + struct da9063 *hw; > + struct delayed_work work; > + struct input_dev *input; > + bool key_power; > +}; > + > +static void da9063_poll_on(struct work_struct *work) > +{ > + struct da9063_onkey *onkey = container_of(work, struct da9063_onkey, > + work.work); > + unsigned int val; > + int poll = 1; Please use booleans for boolean data: bool poll = true; > + int ret; > + > + /* poll to see when the pin is deasserted */ > + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); > + if (ret < 0) { > + dev_err(&onkey->input->dev, > + "Failed to read ON status: %d\n", ret); > + goto err_poll; > + } > + > + if (!(val & DA9063_NONKEY)) { > + ret = regmap_update_bits(onkey->hw->regmap, > + DA9063_REG_CONTROL_B, > + DA9063_NONKEY_LOCK, 0); > + if (ret < 0) { > + dev_err(&onkey->input->dev, > + "Failed to reset the Key Delay %d\n", ret); > + goto err_poll; > + } > + > + input_report_key(onkey->input, KEY_POWER, 0); > + input_sync(onkey->input); This is confusing. Why we report key only if we successfully did the first write but we do not care about the second? > + > + /* unmask the onkey interrupt again */ > + ret = regmap_update_bits(onkey->hw->regmap, > + DA9063_REG_IRQ_MASK_A, > + DA9063_NONKEY, 0); > + if (ret < 0) { > + dev_err(&onkey->input->dev, > + "Failed to unmask the onkey IRQ: %d\n", ret); > + goto err_poll; > + } > + > + poll = 0; poll = false; > + } > + > +err_poll: > + if (poll) > + schedule_delayed_work(&onkey->work, 50); > +} > + > +static irqreturn_t da9063_onkey_irq_handler(int irq, void *data) > +{ > + struct da9063_onkey *onkey = data; > + unsigned int val; > + int ret; > + > + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); > + if (onkey->key_power && (ret >= 0) && (val & DA9063_NONKEY)) { > + ret = regmap_update_bits(onkey->hw->regmap, > + DA9063_REG_IRQ_MASK_A, > + DA9063_NONKEY, 1); > + if (ret < 0) > + dev_err(&onkey->input->dev, > + "Failed to mask the onkey IRQ: %d\n", ret); > + > + input_report_key(onkey->input, KEY_POWER, 1); > + input_sync(onkey->input); > + > + schedule_delayed_work(&onkey->work, 0); > + dev_dbg(&onkey->input->dev, "KEY_POWER pressed.\n"); > + } else { > + input_report_key(onkey->input, KEY_SLEEP, 1); You need input_sync() here as well. > + input_report_key(onkey->input, KEY_SLEEP, 0); > + input_sync(onkey->input); > + dev_dbg(&onkey->input->dev, "KEY_SLEEP pressed.\n"); > + } > + > + return IRQ_HANDLED; > +} > + > +static int da9063_onkey_probe(struct platform_device *pdev) > +{ > + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); > + struct da9063_pdata *pdata = dev_get_platdata(da9063->dev); > + struct da9063_onkey *onkey; > + bool kp_tmp = true; > + int ret = 0; > + int irq; > + > + if (pdata) > + kp_tmp = pdata->key_power; > + > + if (!kp_tmp) > + dev_err(&pdev->dev, > + "Software power down key is not set.\n"); Why is this an error? > + > + onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey), > + GFP_KERNEL); > + if (!onkey) { > + dev_err(&pdev->dev, "Failed to allocate memory.\n"); > + return -ENOMEM; > + } > + > + INIT_DELAYED_WORK(&onkey->work, da9063_poll_on); > + > + onkey->input = devm_input_allocate_device(&pdev->dev); > + if (!onkey->input) { > + dev_err(&pdev->dev, "Failed to allocated input device.\n"); > + return -ENOMEM; > + } > + > + irq = platform_get_irq_byname(pdev, "ONKEY"); > + if (irq < 0) { > + dev_err(&pdev->dev, "Failed to get platform IRQ.\n"); > + return irq; > + } > + > + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, > + da9063_onkey_irq_handler, > + IRQF_TRIGGER_LOW | IRQF_ONESHOT, > + "ONKEY", onkey); > + if (ret) { > + dev_err(&pdev->dev, > + "Failed to request input device IRQ.\n"); > + return ret; > + } > + > + onkey->hw = da9063; > + onkey->key_power = kp_tmp; > + onkey->input->evbit[0] = BIT_MASK(EV_KEY); > + onkey->input->name = DA9063_DRVNAME_ONKEY; > + onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0"; > + onkey->input->dev.parent = &pdev->dev; > + > + if (onkey->key_power) > + input_set_capability(onkey->input, EV_KEY, KEY_POWER); > + input_set_capability(onkey->input, EV_KEY, KEY_SLEEP); > + > + ret = input_register_device(onkey->input); > + if (ret) { > + dev_err(&pdev->dev, > + "Failed to register input device.\n"); > + return ret; > + } > + > + platform_set_drvdata(pdev, onkey); > + return ret; > +} > + > +static int da9063_onkey_remove(struct platform_device *pdev) > +{ > + struct da9063_onkey *onkey = platform_get_drvdata(pdev); > + cancel_delayed_work_sync(&onkey->work); This is racy. Nothing stops IRQ from firing again and rescheduling the work item. You are also missing canceling work item in error path pf probe(). > + input_unregister_device(onkey->input); > + return 0; > +} > + > +static struct platform_driver da9063_onkey_driver = { > + .probe = da9063_onkey_probe, > + .remove = da9063_onkey_remove, > + .driver = { > + .name = DA9063_DRVNAME_ONKEY, > + .owner = THIS_MODULE, > + }, > +}; > + > +module_platform_driver(da9063_onkey_driver); > + > +MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>"); > +MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063"); > +MODULE_LICENSE("GPL v2"); > +MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY); > -- > end-of-patch for RFC V1 > Thanks.
On 07 March 2014 17:46, Dmitry Torokhov wrote: >Hi Steve, > >On Fri, Mar 07, 2014 at 12:37:45PM +0000, Opensource [Steve Twiss] wrote: >> From: Opensource [Steve Twiss] <stwiss.opensource@diasemi.com> >> >> Add the OnKey driver for DA9063. >> >> >> Signed-off-by: Opensource [Steve Twiss] <stwiss.opensource@diasemi.com> >> --- >> Checks performed with next-20140307/scripts/checkpatch.pl >> da9063-onkey.c total: 0 errors, 0 warnings, 202 lines checked >> Kconfig total: 0 errors, 11 warnings, 679 lines checked >> Makefile total: 0 errors, 0 warnings, 66 lines checked >> >> Hello, >> >> This is a RFC for the Dialog DA9063 Onkey driver. >> >> Dependencies: >> >> This driver makes use of the name field "ONKEY" as part of the >> function call: platform_get_irq_byname(); >> >> This driver is therefore dependent on this change to the name field >> in the properties of the the OnKey IORESOURCE_IRQ resource structure >> (part of the mfd_cell Onkey resource inside da9063-core.c). This >> change will be added as part of the final set when I submit all patches >> as a single PATCH set. >> >> This patch applies against kernel version linux-next next-20140307 >> >> Regards, >> Steve Twiss, Dialog Semiconductor Ltd. >> >> >> >> drivers/input/misc/Kconfig | 10 ++ >> drivers/input/misc/Makefile | 1 + >> drivers/input/misc/da9063-onkey.c | 202 >+++++++++++++++++++++++++++++++++++++ >> 3 files changed, 213 insertions(+) >> create mode 100644 drivers/input/misc/da9063-onkey.c >> >> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig >> index 762e6d2..3deb008 100644 >> --- a/drivers/input/misc/Kconfig >> +++ b/drivers/input/misc/Kconfig >> @@ -522,6 +522,16 @@ config INPUT_DA9055_ONKEY >> To compile this driver as a module, choose M here: the module >> will be called da9055_onkey. >> >> +config INPUT_DA9063_ONKEY >> + tristate "Dialog DA9063 OnKey" >> + depends on MFD_DA9063 >> + help >> + Support the ONKEY of Dialog DA9063 Power Management IC as an >> + input device reporting power button statue. >> + >> + To compile this driver as a module, choose M here: the module >> + will be called da9063-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 cda71fc..f40caa7 100644 >> --- a/drivers/input/misc/Makefile >> +++ b/drivers/input/misc/Makefile >> @@ -25,6 +25,7 @@ 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-$(CONFIG_INPUT_DA9063_ONKEY) += da9063-onkey.o >> obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o >> obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o >> obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o >> diff --git a/drivers/input/misc/da9063-onkey.c b/drivers/input/misc/da9063- >onkey.c >> new file mode 100644 >> index 0000000..654f52b >> --- /dev/null >> +++ b/drivers/input/misc/da9063-onkey.c >> @@ -0,0 +1,202 @@ >> +/* da9063-onkey.c - Onkey device driver for DA9063 >> + * Copyright (C) 2013 Dialog Semiconductor Ltd. >> + * >> + * This library is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU Library General Public >> + * License as published by the Free Software Foundation; either >> + * version 2 of the License, or (at your option) any later version. >> + * >> + * This library 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 >> + * Library General Public License for more details. >> + */ >> + >> +#include <linux/module.h> >> +#include <linux/errno.h> >> +#include <linux/input.h> >> +#include <linux/interrupt.h> >> +#include <linux/platform_device.h> >> +#include <linux/workqueue.h> >> +#include <linux/regmap.h> >> + >> +#include <linux/mfd/da9063/core.h> >> +#include <linux/mfd/da9063/pdata.h> >> +#include <linux/mfd/da9063/registers.h> >> + >> +struct da9063_onkey { >> + struct da9063 *hw; >> + struct delayed_work work; >> + struct input_dev *input; >> + bool key_power; >> +}; >> + >> +static void da9063_poll_on(struct work_struct *work) >> +{ >> + struct da9063_onkey *onkey = container_of(work, struct da9063_onkey, >> + work.work); >> + unsigned int val; >> + int poll = 1; > >Please use booleans for boolean data: > > bool poll = true; > Yes, I'll add those changes. >> + int ret; >> + >> + /* poll to see when the pin is deasserted */ >> + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); >> + if (ret < 0) { >> + dev_err(&onkey->input->dev, >> + "Failed to read ON status: %d\n", ret); >> + goto err_poll; >> + } >> + >> + if (!(val & DA9063_NONKEY)) { >> + ret = regmap_update_bits(onkey->hw->regmap, >> + DA9063_REG_CONTROL_B, >> + DA9063_NONKEY_LOCK, 0); >> + if (ret < 0) { >> + dev_err(&onkey->input->dev, >> + "Failed to reset the Key Delay %d\n", ret); >> + goto err_poll; >> + } >> + >> + input_report_key(onkey->input, KEY_POWER, 0); >> + input_sync(onkey->input); > >This is confusing. Why we report key only if we successfully did the >first write but we do not care about the second? > I'll clarify this .. >> + >> + /* unmask the onkey interrupt again */ >> + ret = regmap_update_bits(onkey->hw->regmap, >> + DA9063_REG_IRQ_MASK_A, >> + DA9063_NONKEY, 0); >> + if (ret < 0) { >> + dev_err(&onkey->input->dev, >> + "Failed to unmask the onkey IRQ: %d\n", ret); >> + goto err_poll; >> + } >> + >> + poll = 0; > > poll = false; > Yep.. This also >> + } >> + >> +err_poll: >> + if (poll) >> + schedule_delayed_work(&onkey->work, 50); >> +} >> + >> +static irqreturn_t da9063_onkey_irq_handler(int irq, void *data) >> +{ >> + struct da9063_onkey *onkey = data; >> + unsigned int val; >> + int ret; >> + >> + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); >> + if (onkey->key_power && (ret >= 0) && (val & DA9063_NONKEY)) { >> + ret = regmap_update_bits(onkey->hw->regmap, >> + DA9063_REG_IRQ_MASK_A, >> + DA9063_NONKEY, 1); >> + if (ret < 0) >> + dev_err(&onkey->input->dev, >> + "Failed to mask the onkey IRQ: %d\n", ret); >> + >> + input_report_key(onkey->input, KEY_POWER, 1); >> + input_sync(onkey->input); >> + >> + schedule_delayed_work(&onkey->work, 0); >> + dev_dbg(&onkey->input->dev, "KEY_POWER pressed.\n"); >> + } else { >> + input_report_key(onkey->input, KEY_SLEEP, 1); > >You need input_sync() here as well. > Okay, thanks. >> + input_report_key(onkey->input, KEY_SLEEP, 0); >> + input_sync(onkey->input); >> + dev_dbg(&onkey->input->dev, "KEY_SLEEP pressed.\n"); >> + } >> + >> + return IRQ_HANDLED; >> +} >> + >> +static int da9063_onkey_probe(struct platform_device *pdev) >> +{ >> + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); >> + struct da9063_pdata *pdata = dev_get_platdata(da9063->dev); >> + struct da9063_onkey *onkey; >> + bool kp_tmp = true; >> + int ret = 0; >> + int irq; >> + >> + if (pdata) >> + kp_tmp = pdata->key_power; >> + >> + if (!kp_tmp) >> + dev_err(&pdev->dev, >> + "Software power down key is not set.\n"); > >Why is this an error? > Um, yeah, this isn't an error at all. Sorry >> + >> + onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey), >> + GFP_KERNEL); >> + if (!onkey) { >> + dev_err(&pdev->dev, "Failed to allocate memory.\n"); >> + return -ENOMEM; >> + } >> + >> + INIT_DELAYED_WORK(&onkey->work, da9063_poll_on); >> + >> + onkey->input = devm_input_allocate_device(&pdev->dev); >> + if (!onkey->input) { >> + dev_err(&pdev->dev, "Failed to allocated input device.\n"); >> + return -ENOMEM; >> + } >> + >> + irq = platform_get_irq_byname(pdev, "ONKEY"); >> + if (irq < 0) { >> + dev_err(&pdev->dev, "Failed to get platform IRQ.\n"); >> + return irq; >> + } >> + >> + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, >> + da9063_onkey_irq_handler, >> + IRQF_TRIGGER_LOW | IRQF_ONESHOT, >> + "ONKEY", onkey); >> + if (ret) { >> + dev_err(&pdev->dev, >> + "Failed to request input device IRQ.\n"); >> + return ret; >> + } >> + >> + onkey->hw = da9063; >> + onkey->key_power = kp_tmp; >> + onkey->input->evbit[0] = BIT_MASK(EV_KEY); >> + onkey->input->name = DA9063_DRVNAME_ONKEY; >> + onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0"; >> + onkey->input->dev.parent = &pdev->dev; >> + >> + if (onkey->key_power) >> + input_set_capability(onkey->input, EV_KEY, KEY_POWER); >> + input_set_capability(onkey->input, EV_KEY, KEY_SLEEP); >> + >> + ret = input_register_device(onkey->input); >> + if (ret) { >> + dev_err(&pdev->dev, >> + "Failed to register input device.\n"); >> + return ret; >> + } >> + >> + platform_set_drvdata(pdev, onkey); >> + return ret; >> +} >> + >> +static int da9063_onkey_remove(struct platform_device *pdev) >> +{ >> + struct da9063_onkey *onkey = platform_get_drvdata(pdev); >> + cancel_delayed_work_sync(&onkey->work); > >This is racy. Nothing stops IRQ from firing again and rescheduling the >work item. You are also missing canceling work item in error path pf >probe(). > Ah. I will look at this whole item again, especially the error paths >> + input_unregister_device(onkey->input); >> + return 0; >> +} >> + >> +static struct platform_driver da9063_onkey_driver = { >> + .probe = da9063_onkey_probe, >> + .remove = da9063_onkey_remove, >> + .driver = { >> + .name = DA9063_DRVNAME_ONKEY, >> + .owner = THIS_MODULE, >> + }, >> +}; >> + >> +module_platform_driver(da9063_onkey_driver); >> + >> +MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>"); >> +MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063"); >> +MODULE_LICENSE("GPL v2"); >> +MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY); >> -- >> end-of-patch for RFC V1 >> > >Thanks. > >-- >Dmitry Thank you for taking the time to work through this. I will make the changes you have listed and then resubmit. 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diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 762e6d2..3deb008 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -522,6 +522,16 @@ config INPUT_DA9055_ONKEY To compile this driver as a module, choose M here: the module will be called da9055_onkey. +config INPUT_DA9063_ONKEY + tristate "Dialog DA9063 OnKey" + depends on MFD_DA9063 + help + Support the ONKEY of Dialog DA9063 Power Management IC as an + input device reporting power button statue. + + To compile this driver as a module, choose M here: the module + will be called da9063-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 cda71fc..f40caa7 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -25,6 +25,7 @@ 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-$(CONFIG_INPUT_DA9063_ONKEY) += da9063-onkey.o obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o diff --git a/drivers/input/misc/da9063-onkey.c b/drivers/input/misc/da9063-onkey.c new file mode 100644 index 0000000..654f52b --- /dev/null +++ b/drivers/input/misc/da9063-onkey.c @@ -0,0 +1,202 @@ +/* da9063-onkey.c - Onkey device driver for DA9063 + * Copyright (C) 2013 Dialog Semiconductor Ltd. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> +#include <linux/regmap.h> + +#include <linux/mfd/da9063/core.h> +#include <linux/mfd/da9063/pdata.h> +#include <linux/mfd/da9063/registers.h> + +struct da9063_onkey { + struct da9063 *hw; + struct delayed_work work; + struct input_dev *input; + bool key_power; +}; + +static void da9063_poll_on(struct work_struct *work) +{ + struct da9063_onkey *onkey = container_of(work, struct da9063_onkey, + work.work); + unsigned int val; + int poll = 1; + int ret; + + /* poll to see when the pin is deasserted */ + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); + if (ret < 0) { + dev_err(&onkey->input->dev, + "Failed to read ON status: %d\n", ret); + goto err_poll; + } + + if (!(val & DA9063_NONKEY)) { + ret = regmap_update_bits(onkey->hw->regmap, + DA9063_REG_CONTROL_B, + DA9063_NONKEY_LOCK, 0); + if (ret < 0) { + dev_err(&onkey->input->dev, + "Failed to reset the Key Delay %d\n", ret); + goto err_poll; + } + + input_report_key(onkey->input, KEY_POWER, 0); + input_sync(onkey->input); + + /* unmask the onkey interrupt again */ + ret = regmap_update_bits(onkey->hw->regmap, + DA9063_REG_IRQ_MASK_A, + DA9063_NONKEY, 0); + if (ret < 0) { + dev_err(&onkey->input->dev, + "Failed to unmask the onkey IRQ: %d\n", ret); + goto err_poll; + } + + poll = 0; + } + +err_poll: + if (poll) + schedule_delayed_work(&onkey->work, 50); +} + +static irqreturn_t da9063_onkey_irq_handler(int irq, void *data) +{ + struct da9063_onkey *onkey = data; + unsigned int val; + int ret; + + ret = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val); + if (onkey->key_power && (ret >= 0) && (val & DA9063_NONKEY)) { + ret = regmap_update_bits(onkey->hw->regmap, + DA9063_REG_IRQ_MASK_A, + DA9063_NONKEY, 1); + if (ret < 0) + dev_err(&onkey->input->dev, + "Failed to mask the onkey IRQ: %d\n", ret); + + input_report_key(onkey->input, KEY_POWER, 1); + input_sync(onkey->input); + + schedule_delayed_work(&onkey->work, 0); + dev_dbg(&onkey->input->dev, "KEY_POWER pressed.\n"); + } else { + input_report_key(onkey->input, KEY_SLEEP, 1); + input_report_key(onkey->input, KEY_SLEEP, 0); + input_sync(onkey->input); + dev_dbg(&onkey->input->dev, "KEY_SLEEP pressed.\n"); + } + + return IRQ_HANDLED; +} + +static int da9063_onkey_probe(struct platform_device *pdev) +{ + struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); + struct da9063_pdata *pdata = dev_get_platdata(da9063->dev); + struct da9063_onkey *onkey; + bool kp_tmp = true; + int ret = 0; + int irq; + + if (pdata) + kp_tmp = pdata->key_power; + + if (!kp_tmp) + dev_err(&pdev->dev, + "Software power down key is not set.\n"); + + onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey), + GFP_KERNEL); + if (!onkey) { + dev_err(&pdev->dev, "Failed to allocate memory.\n"); + return -ENOMEM; + } + + INIT_DELAYED_WORK(&onkey->work, da9063_poll_on); + + onkey->input = devm_input_allocate_device(&pdev->dev); + if (!onkey->input) { + dev_err(&pdev->dev, "Failed to allocated input device.\n"); + return -ENOMEM; + } + + irq = platform_get_irq_byname(pdev, "ONKEY"); + if (irq < 0) { + dev_err(&pdev->dev, "Failed to get platform IRQ.\n"); + return irq; + } + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + da9063_onkey_irq_handler, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "ONKEY", onkey); + if (ret) { + dev_err(&pdev->dev, + "Failed to request input device IRQ.\n"); + return ret; + } + + onkey->hw = da9063; + onkey->key_power = kp_tmp; + onkey->input->evbit[0] = BIT_MASK(EV_KEY); + onkey->input->name = DA9063_DRVNAME_ONKEY; + onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0"; + onkey->input->dev.parent = &pdev->dev; + + if (onkey->key_power) + input_set_capability(onkey->input, EV_KEY, KEY_POWER); + input_set_capability(onkey->input, EV_KEY, KEY_SLEEP); + + ret = input_register_device(onkey->input); + if (ret) { + dev_err(&pdev->dev, + "Failed to register input device.\n"); + return ret; + } + + platform_set_drvdata(pdev, onkey); + return ret; +} + +static int da9063_onkey_remove(struct platform_device *pdev) +{ + struct da9063_onkey *onkey = platform_get_drvdata(pdev); + cancel_delayed_work_sync(&onkey->work); + input_unregister_device(onkey->input); + return 0; +} + +static struct platform_driver da9063_onkey_driver = { + .probe = da9063_onkey_probe, + .remove = da9063_onkey_remove, + .driver = { + .name = DA9063_DRVNAME_ONKEY, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9063_onkey_driver); + +MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>"); +MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);