With this driver, we can report KEY_POWER on AM437x SK. This patch has been tested with said board. Signed-off-by: Felipe Balbi <balbi@xxxxxx> --- drivers/input/misc/Kconfig | 10 +++ drivers/input/misc/Makefile | 1 + drivers/input/misc/tps65218-pwrbutton.c | 135 ++++++++++++++++++++++++++++++++ 3 files changed, 146 insertions(+) create mode 100644 drivers/input/misc/tps65218-pwrbutton.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 23297ab..364cfb8 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON To compile this driver as a module, choose M here. The module will be called retu-pwrbutton. +config INPUT_TPS65218_PWRBUTTON + tristate "TPS65218 Power button driver" + depends on MFD_TPS65218 + help + Say Y here if you want to enable power buttong reporting for + the TPS65218 Power Management IC device. + + To compile this driver as a module, choose M here. The module will + be called tps65218-pwrbutton. + config INPUT_TWL4030_PWRBUTTON tristate "TWL4030 Power button Driver" depends on TWL4030_CORE diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 19c7603..a923753 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -59,6 +59,7 @@ 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-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o obj-$(CONFIG_INPUT_TWL6040_VIBRA) += twl6040-vibra.o diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c new file mode 100644 index 0000000..a1f8a19 --- /dev/null +++ b/drivers/input/misc/tps65218-pwrbutton.c @@ -0,0 +1,135 @@ +/* + * Texas Instruments' TPS65218 Power Button Input Driver + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Felipe Balbi <balbi@xxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/tps65218.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +struct tps65218_pwrbutton { + struct device *dev; + struct tps65218 *tps; + struct input_dev *idev; + int irq; + + unsigned int pressed:1; +}; + +static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr) +{ + struct tps65218_pwrbutton *pwr = _pwr; + unsigned int reg; + int ret; + + ret = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®); + if (ret) { + dev_err(pwr->dev, "can't read register --> %d\n", ret); + goto out; + } + + if (reg & TPS65218_STATUS_PB_STATE) { + input_report_key(pwr->idev, KEY_POWER, 1); + pm_wakeup_event(pwr->dev, 0); + pwr->pressed = true; + } else { + /* + * we don't want to report KEY_POWER releases on any of the + * other IRQ sources. Only when button was previously pressed + */ + if (pwr->pressed) { + input_report_key(pwr->idev, KEY_POWER, 0); + pwr->pressed = false; + } + } + + input_sync(pwr->idev); + +out: + return IRQ_HANDLED; +} + +static int tps65218_pwron_probe(struct platform_device *pdev) +{ + struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct tps65218_pwrbutton *pwr; + struct input_dev *idev; + int ret; + + pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL); + if (!pwr) + return -ENOMEM; + + idev = devm_input_allocate_device(dev); + if (!idev) + return -ENOMEM; + + idev->name = "tps65218_pwrbutton"; + idev->phys = "tps65218_pwrbutton/input0"; + idev->dev.parent = dev; + idev->id.bustype = BUS_I2C; + + input_set_capability(idev, EV_KEY, KEY_POWER); + + pwr->tps = tps; + pwr->dev = dev; + pwr->idev = idev; + pwr->irq = platform_get_irq(pdev, 0); + platform_set_drvdata(pdev, pwr); + device_init_wakeup(dev, true); + + ret = devm_request_threaded_irq(dev, pwr->irq, NULL, tps65218_pwr_irq, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), pwr); + if (ret) { + dev_err(dev, "failed to request IRQ #%d --> %d\n", + pwr->irq, ret); + return ret; + } + + ret = input_register_device(idev); + if (ret) { + dev_err(dev, "Can't register power button --> %d\n", ret); + return ret; + } + + return 0; +} + +static struct of_device_id of_tps65218_pwr_match[] = { + { .compatible = "ti,tps65218-pwrbutton" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match); + +static struct platform_driver tps65218_pwron_driver = { + .probe = tps65218_pwron_probe, + .driver = { + .name = "tps65218_pwrbutton", + .of_match_table = of_tps65218_pwr_match, + }, +}; +module_platform_driver(tps65218_pwron_driver); + +MODULE_DESCRIPTION("TPS65218 Power Button"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Felipe Balbi <balbi@xxxxxx>"); -- 2.2.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
