This driver enables us to use tps65217's power button as KEY_POWER on am335x boards (directly connected button in chiliboard, accessible pin via expansion header in beaglebone). This patch has been tested with chiliboard. Signed-off-by: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx> --- .../bindings/input/tps65217-pwrbutton.txt | 14 +++ drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/tps65217-pwrbutton.c | 131 +++++++++++++++++++++ 4 files changed, 156 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/tps65217-pwrbutton.txt create mode 100644 drivers/input/misc/tps65217-pwrbutton.c diff --git a/Documentation/devicetree/bindings/input/tps65217-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65217-pwrbutton.txt new file mode 100644 index 0000000..6cba51d --- /dev/null +++ b/Documentation/devicetree/bindings/input/tps65217-pwrbutton.txt @@ -0,0 +1,14 @@ +Texas Instruments TPS65217 power button + +This driver provides a simple power button event via an Interrupt. + +Required properties: +- compatible: should be "ti,tps65217-pwrbutton" + +Example: + +&tps { + tps65217-pwrbutton { + compatible = "ti,tps65217-pwrbutton"; + }; +}; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 1f2337a..2649400 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -438,6 +438,16 @@ config INPUT_RETU_PWRBUTTON To compile this driver as a module, choose M here. The module will be called retu-pwrbutton. +config INPUT_TPS65217_PWRBUTTON + tristate "TPS65217 Power button driver" + depends on MFD_TPS65217 + help + Say Y here if you want to enable power button reporting for + the TPS65217 Power Management IC device. + + To compile this driver as a module, choose M here. The module will + be called tps65217-pwrbutton. + config INPUT_TPS65218_PWRBUTTON tristate "TPS65218 Power button driver" depends on MFD_TPS65218 diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 0357a08..651cafc 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -65,6 +65,7 @@ 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-$(CONFIG_INPUT_TPS65217_PWRBUTTON) += tps65217-pwrbutton.o obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o diff --git a/drivers/input/misc/tps65217-pwrbutton.c b/drivers/input/misc/tps65217-pwrbutton.c new file mode 100644 index 0000000..50372bf --- /dev/null +++ b/drivers/input/misc/tps65217-pwrbutton.c @@ -0,0 +1,131 @@ +/* + * Texas Instruments' TPS65217 Power Button Input Driver + * + * Copyright (C) 2016 Grinn - http://www.grinn-global.com/ + * Author: Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx> + * + * 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/tps65217.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +struct tps65217_pwrbutton { + struct device *dev; + struct tps65217 *tps; + struct input_dev *idev; +}; + +static irqreturn_t tps65217_pb_irq(int irq, void *data) +{ + struct tps65217_pwrbutton *pwr = data; + unsigned int reg; + int error; + + error = tps65217_reg_read(pwr->tps, TPS65217_REG_STATUS, ®); + if (error) { + dev_err(pwr->dev, "can't read register: %d\n", error); + goto out; + } + + if (reg & TPS65217_STATUS_PB) { + input_report_key(pwr->idev, KEY_POWER, 1); + pm_wakeup_event(pwr->dev, 0); + } else { + input_report_key(pwr->idev, KEY_POWER, 0); + } + + input_sync(pwr->idev); + +out: + return IRQ_HANDLED; +} + +static int tps65217_pb_probe(struct platform_device *pdev) +{ + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct tps65217_pwrbutton *pwr; + struct input_dev *idev; + int error; + int irq; + + pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL); + if (!pwr) + return -ENOMEM; + + idev = devm_input_allocate_device(dev); + if (!idev) + return -ENOMEM; + + idev->name = "tps65217_pwrbutton"; + idev->phys = "tps65217_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; + platform_set_drvdata(pdev, pwr); + device_init_wakeup(dev, true); + + irq = platform_get_irq_byname(pdev, "PB"); + if (irq < 0) { + dev_err(dev, "No IRQ resource!\n"); + return -EINVAL; + } + + error = devm_request_threaded_irq(dev, irq, NULL, tps65217_pb_irq, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + "tps65217-pwrbutton", pwr); + if (error) { + dev_err(dev, "failed to request IRQ #%d: %d\n", + irq, error); + return error; + } + + error = input_register_device(idev); + if (error) { + dev_err(dev, "Can't register power button: %d\n", error); + return error; + } + + return 0; +} + +static const struct of_device_id tps65217_pb_match[] = { + { .compatible = "ti,tps65217-pwrbutton" }, + { }, +}; +MODULE_DEVICE_TABLE(of, tps65217_pb_match); + +static struct platform_driver tps65217_pb_driver = { + .probe = tps65217_pb_probe, + .driver = { + .name = "tps65217-pwrbutton", + .of_match_table = tps65217_pb_match, + }, +}; +module_platform_driver(tps65217_pb_driver); + +MODULE_DESCRIPTION("TPS65217 Power Button"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Marcin Niestroj <m.niestroj@xxxxxxxxxxxxxxxx>"); -- 2.8.0 -- 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