From: pascal paillet <[email protected]> The stpmu1 pmic is able to manage an onkey button. This driver exposes the stpmu1 onkey as an input device. It can also be configured to shut-down the power supplies on a long key-press with an adjustable duration.
Signed-off-by: pascal paillet <[email protected]> --- drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 2 + drivers/input/misc/stpmu1_onkey.c | 321 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 334 insertions(+) create mode 100644 drivers/input/misc/stpmu1_onkey.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index c25606e..d020971 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -841,4 +841,15 @@ config INPUT_RAVE_SP_PWRBUTTON To compile this driver as a module, choose M here: the module will be called rave-sp-pwrbutton. +config INPUT_STPMU1_ONKEY + tristate "STPMU1 PMIC Onkey support" + depends on MFD_STPMU1 + help + Say Y to enable support of onkey embedded into STPMU1 PMIC. onkey + can be used to wakeup from low power modes and force a shut-down on + long press. + + To compile this driver as a module, choose M here: the + module will be called stpmu1_onkey. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 72cde28..cc60dc1 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o +obj-$(CONFIG_INPUT_STPMU1_ONKEY) += stpmu1_onkey.o obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o @@ -80,3 +81,4 @@ obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) += ideapad_slidebar.o + diff --git a/drivers/input/misc/stpmu1_onkey.c b/drivers/input/misc/stpmu1_onkey.c new file mode 100644 index 0000000..084a31f --- /dev/null +++ b/drivers/input/misc/stpmu1_onkey.c @@ -0,0 +1,321 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) STMicroelectronics 2018 - All Rights Reserved + * Author: Philippe Peurichard <[email protected]>, + * Pascal Paillet <[email protected]> for STMicroelectronics. + */ + +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/mfd/stpmu1.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +/** + * struct stpmu1_onkey - OnKey data + * @pmic: pointer to STPMU1 PMIC device + * @input_dev: pointer to input device + * @irq_falling: irq that we are hooked on to + * @irq_rising: irq that we are hooked on to + */ +struct stpmu1_onkey { + struct stpmu1_dev *pmic; + struct input_dev *input_dev; + int irq_falling; + int irq_rising; +}; + +/** + * struct pmic_onkey_config - configuration of pmic PONKEYn + * @turnoff_enabled: value to enable turnoff condition + * @cc_flag_clear: value to clear CC flag in case of PowerOff + * trigger by longkey press + * @onkey_pullup_val: value of PONKEY PullUp (active or inactive) + * @long_press_time_val: value for long press h/w shutdown event + */ +struct pmic_onkey_config { + bool turnoff_enabled; + bool cc_flag_clear; + u8 onkey_pullup_val; + u8 long_press_time_val; +}; + +/** + * onkey_falling_irq() - button press isr + * @irq: irq + * @pmic_onkey: onkey device + * + * Return: IRQ_HANDLED + */ +static irqreturn_t onkey_falling_irq(int irq, void *ponkey) +{ + struct stpmu1_onkey *onkey = ponkey; + struct input_dev *input_dev = onkey->input_dev; + + input_report_key(input_dev, KEY_POWER, 1); + pm_wakeup_event(input_dev->dev.parent, 0); + input_sync(input_dev); + + dev_dbg(&input_dev->dev, "Pwr Onkey Falling Interrupt received\n"); + + return IRQ_HANDLED; +} + +/** + * onkey_rising_irq() - button released isr + * @irq: irq + * @pmic_onkey: onkey device + * + * Return: IRQ_HANDLED + */ +static irqreturn_t onkey_rising_irq(int irq, void *ponkey) +{ + struct stpmu1_onkey *onkey = ponkey; + struct input_dev *input_dev = onkey->input_dev; + + input_report_key(input_dev, KEY_POWER, 0); + pm_wakeup_event(input_dev->dev.parent, 0); + input_sync(input_dev); + + dev_dbg(&input_dev->dev, "Pwr Onkey Rising Interrupt received\n"); + + return IRQ_HANDLED; +} + +/** + * stpmu1_onkey_dt_params() - device tree parameter parser + * @pdev: platform device for the PONKEY + * @onkey: pointer to onkey driver data + * @config: configuration params to be filled up + */ +static int stpmu1_onkey_dt_params(struct platform_device *pdev, + struct stpmu1_onkey *onkey, + struct pmic_onkey_config *config) +{ + struct device *dev = &pdev->dev; + struct device_node *np; + u32 val; + + np = dev->of_node; + if (!np) + return -EINVAL; + + onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling"); + if (onkey->irq_falling < 0) { + dev_err(dev, "failed: request IRQ onkey-falling %d", + onkey->irq_falling); + return onkey->irq_falling; + } + + onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising"); + if (onkey->irq_rising < 0) { + dev_err(dev, "failed: request IRQ onkey-rising %d", + onkey->irq_rising); + return onkey->irq_rising; + } + + if (!of_property_read_u32(np, "st,onkey-long-press-seconds", &val)) { + if (val >= 1 && val <= 16) { + config->long_press_time_val = (16 - val); + } else { + dev_warn(dev, + "Invalid range of long key pressed timer %d (<16)\n\r", + val); + } + } + if (of_get_property(np, "st,onkey-pwroff-enabled", NULL)) + config->turnoff_enabled = true; + + if (of_get_property(np, "st,onkey-clear-cc-flag", NULL)) + config->cc_flag_clear = true; + + if (of_get_property(np, "st,onkey-pu-inactive", NULL)) + config->onkey_pullup_val = PONKEY_PU_ACTIVE; + + dev_dbg(dev, "onkey-switch-off duration=%d seconds\n", + config->long_press_time_val); + + return 0; +} + +/** + * stpmu1_onkey_probe() - probe + * @pdev: platform device for the PONKEY + * + * Return: 0 for successful probe else appropriate error + */ +static int stpmu1_onkey_probe(struct platform_device *pdev) +{ + struct stpmu1_dev *pmic = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct input_dev *input_dev; + struct stpmu1_onkey *onkey; + struct pmic_onkey_config config; + unsigned int val = 0; + int ret; + + onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL); + if (!onkey) + return -ENOMEM; + + memset(&config, 0, sizeof(struct pmic_onkey_config)); + ret = stpmu1_onkey_dt_params(pdev, onkey, &config); + if (ret < 0) + goto err; + + input_dev = devm_input_allocate_device(dev); + if (!input_dev) { + dev_err(dev, "Can't allocate Pwr Onkey Input Device\n"); + ret = -ENOMEM; + goto err; + } + + input_dev->name = "pmic_onkey"; + input_dev->phys = "pmic_onkey/input0"; + input_dev->dev.parent = dev; + + input_set_capability(input_dev, EV_KEY, KEY_POWER); + + /* Setup Power Onkey Hardware parameters (long key press)*/ + val = (config.long_press_time_val & PONKEY_TURNOFF_TIMER_MASK); + if (config.turnoff_enabled) + val |= PONKEY_PWR_OFF; + if (config.cc_flag_clear) + val |= PONKEY_CC_FLAG_CLEAR; + ret = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR, + PONKEY_TURNOFF_MASK, val); + if (ret) { + dev_err(dev, "LONG_PRESS_KEY_UPDATE failed: %d\n", ret); + goto err; + } + + ret = regmap_update_bits(pmic->regmap, PADS_PULL_CR, + PONKEY_PU_ACTIVE, + config.onkey_pullup_val); + + if (ret) { + dev_err(dev, "ONKEY Pads configuration failed: %d\n", ret); + goto err; + } + + onkey->pmic = pmic; + onkey->input_dev = input_dev; + + ret = devm_request_threaded_irq(dev, onkey->irq_falling, NULL, + onkey_falling_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), onkey); + if (ret) { + dev_err(dev, "Can't get IRQ for Onkey Falling edge: %d\n", ret); + goto err; + } + + ret = devm_request_threaded_irq(dev, onkey->irq_rising, NULL, + onkey_rising_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), onkey); + if (ret) { + dev_err(dev, "Can't get IRQ for Onkey Rising edge: %d\n", ret); + goto err; + } + + ret = input_register_device(input_dev); + if (ret) { + dev_err(dev, "Can't register power button: %d\n", ret); + goto err; + } + + platform_set_drvdata(pdev, onkey); + device_init_wakeup(dev, true); + + dev_dbg(dev, "PMIC Pwr Onkey driver probed\n"); + +err: + return ret; +} + +/** + * stpmu1_onkey_remove() - Cleanup on removal + * @pdev: platform device for the button + * + * Return: 0 + */ +static int stpmu1_onkey_remove(struct platform_device *pdev) +{ + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + input_unregister_device(onkey->input_dev); + return 0; +} + +#ifdef CONFIG_PM_SLEEP + +/** + * pmic_onkey_suspend() - suspend handler + * @dev: power button device + * + * Cancel all pending work items for the power button, setup irq for wakeup + * + * Return: 0 + */ +static int __maybe_unused stpmu1_onkey_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + if (device_may_wakeup(dev)) { + enable_irq_wake(onkey->irq_falling); + enable_irq_wake(onkey->irq_rising); + } + return 0; +} + +/** + * pmic_onkey_resume() - resume handler + * @dev: power button device + * + * Just disable the wakeup capability of irq here. + * + * Return: 0 + */ +static int __maybe_unused stpmu1_onkey_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct stpmu1_onkey *onkey = platform_get_drvdata(pdev); + + if (device_may_wakeup(dev)) { + disable_irq_wake(onkey->irq_falling); + disable_irq_wake(onkey->irq_rising); + } + return 0; +} + +#endif + +static SIMPLE_DEV_PM_OPS(stpmu1_onkey_pm, + stpmu1_onkey_suspend, + stpmu1_onkey_resume); + +static const struct of_device_id of_stpmu1_onkey_match[] = { + { .compatible = "st,stpmu1-onkey" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, of_stpmu1_onkey_match); + +static struct platform_driver stpmu1_onkey_driver = { + .probe = stpmu1_onkey_probe, + .remove = stpmu1_onkey_remove, + .driver = { + .name = "stpmu1_onkey", + .of_match_table = of_match_ptr(of_stpmu1_onkey_match), + .pm = &stpmu1_onkey_pm, + }, +}; +module_platform_driver(stpmu1_onkey_driver); + +MODULE_DESCRIPTION("Onkey driver for STPMU1"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("[email protected]>"); -- 1.9.1
