diff options
author | Felipe Balbi <balbi@ti.com> | 2014-12-28 04:37:37 (GMT) |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-12-28 04:43:03 (GMT) |
commit | 5fafed3e5612e9f308d20dc94adf5fc3d4a1a2a8 (patch) | |
tree | 2d37cb7360ea3d970352eb11a75aada59dd12aea | |
parent | af6a5af8e8cc1566fc06636de02347825808650e (diff) | |
download | linux-5fafed3e5612e9f308d20dc94adf5fc3d4a1a2a8.tar.xz |
Input: add tps65218 power button driver
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@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
-rw-r--r-- | Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt | 17 | ||||
-rw-r--r-- | drivers/input/misc/Kconfig | 10 | ||||
-rw-r--r-- | drivers/input/misc/Makefile | 1 | ||||
-rw-r--r-- | drivers/input/misc/tps65218-pwrbutton.c | 126 |
4 files changed, 154 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt new file mode 100644 index 0000000..e30e0b9 --- /dev/null +++ b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt @@ -0,0 +1,17 @@ +Texas Instruments TPS65218 power button + +This driver provides a simple power button event via an Interrupt. + +Required properties: +- compatible: should be "ti,tps65218-pwrbutton" +- interrupts: should be one of the following + - <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218 + +Example: + +&tps { + power-button { + compatible = "ti,tps65218-pwrbutton"; + interrupts = <3 IRQ_TYPE_EDGE_BOTH>; + }; +}; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 1da0a20..9591917 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -416,6 +416,16 @@ 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 1f135af..9a1083f 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -60,6 +60,7 @@ 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..54508de --- /dev/null +++ b/drivers/input/misc/tps65218-pwrbutton.c @@ -0,0 +1,126 @@ +/* + * Texas Instruments' TPS65218 Power Button Input Driver + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Felipe Balbi <balbi@ti.com> + * + * 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; +}; + +static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr) +{ + struct tps65218_pwrbutton *pwr = _pwr; + unsigned int reg; + int error; + + error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®); + if (error) { + dev_err(pwr->dev, "can't read register: %d\n", error); + goto out; + } + + if (reg & TPS65218_STATUS_PB_STATE) { + 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 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 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 = "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; + platform_set_drvdata(pdev, pwr); + device_init_wakeup(dev, true); + + irq = platform_get_irq(pdev, 0); + error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + "tps65218-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 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@ti.com>"); |