From 6d99971842f6b0779738d8c168d9ed92ef1ff5fc Mon Sep 17 00:00:00 2001 From: Sebastian Reichel Date: Tue, 21 Mar 2017 23:50:42 +0100 Subject: [PATCH] input: cpcap-pwrbutton: New driver Motorola CPCAP is a PMIC found in multiple smartphones. This driver adds support for the power/on button and has been tested in Droid 4. Acked-by: Rob Herring Acked-by: Dmitry Torokhov Tested-by: Tony Lindgren Signed-off-by: Sebastian Reichel Signed-off-by: Lee Jones --- .../devicetree/bindings/input/cpcap-pwrbutton.txt | 20 ++++ drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/cpcap-pwrbutton.c | 117 +++++++++++++++++++++ 4 files changed, 148 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt create mode 100644 drivers/input/misc/cpcap-pwrbutton.c diff --git a/Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt b/Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt new file mode 100644 index 0000000..0dd0076 --- /dev/null +++ b/Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt @@ -0,0 +1,20 @@ +Motorola CPCAP on key + +This module is part of the CPCAP. For more details about the whole +chip see Documentation/devicetree/bindings/mfd/motorola-cpcap.txt. + +This module provides a simple power button event via an Interrupt. + +Required properties: +- compatible: should be one of the following + - "motorola,cpcap-pwrbutton" +- interrupts: irq specifier for CPCAP's ON IRQ + +Example: + +&cpcap { + cpcap_pwrbutton: pwrbutton { + compatible = "motorola,cpcap-pwrbutton"; + interrupts = <23 IRQ_TYPE_NONE>; + }; +}; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 5b6c522..9f7b722 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -316,6 +316,16 @@ config INPUT_COBALT_BTNS To compile this driver as a module, choose M here: the module will be called cobalt_btns. +config INPUT_CPCAP_PWRBUTTON + tristate "CPCAP OnKey" + depends on MFD_CPCAP + help + Say Y here if you want to enable power key reporting via the + Motorola CPCAP chip. + + To compile this driver as a module, choose M here. The module will + be called cpcap-pwrbutton. + config INPUT_WISTRON_BTNS tristate "x86 Wistron laptop button interface" depends on X86_32 diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index b10523f..b923a98 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_INPUT_CM109) += cm109.o obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o +obj-$(CONFIG_INPUT_CPCAP_PWRBUTTON) += cpcap-pwrbutton.o obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063_onkey.o diff --git a/drivers/input/misc/cpcap-pwrbutton.c b/drivers/input/misc/cpcap-pwrbutton.c new file mode 100644 index 0000000..0abef63 --- /dev/null +++ b/drivers/input/misc/cpcap-pwrbutton.c @@ -0,0 +1,117 @@ +/** + * CPCAP Power Button Input Driver + * + * Copyright (C) 2017 Sebastian Reichel + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * This program 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 General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CPCAP_IRQ_ON 23 +#define CPCAP_IRQ_ON_BITMASK (1 << (CPCAP_IRQ_ON % 16)) + +struct cpcap_power_button { + struct regmap *regmap; + struct input_dev *idev; + struct device *dev; +}; + +static irqreturn_t powerbutton_irq(int irq, void *_button) +{ + struct cpcap_power_button *button = _button; + int val; + + val = cpcap_sense_virq(button->regmap, irq); + if (val < 0) { + dev_err(button->dev, "irq read failed: %d", val); + return IRQ_HANDLED; + } + + pm_wakeup_event(button->dev, 0); + input_report_key(button->idev, KEY_POWER, val); + input_sync(button->idev); + + return IRQ_HANDLED; +} + +static int cpcap_power_button_probe(struct platform_device *pdev) +{ + struct cpcap_power_button *button; + int irq = platform_get_irq(pdev, 0); + int err; + + button = devm_kmalloc(&pdev->dev, sizeof(*button), GFP_KERNEL); + if (!button) + return -ENOMEM; + + button->idev = devm_input_allocate_device(&pdev->dev); + if (!button->idev) + return -ENOMEM; + + button->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!button->regmap) + return -ENODEV; + + button->dev = &pdev->dev; + + button->idev->name = "cpcap-pwrbutton"; + button->idev->phys = "cpcap-pwrbutton/input0"; + button->idev->dev.parent = button->dev; + input_set_capability(button->idev, EV_KEY, KEY_POWER); + + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, + powerbutton_irq, IRQF_ONESHOT, "cpcap_pwrbutton", button); + if (err < 0) { + dev_err(&pdev->dev, "IRQ request failed: %d\n", err); + return err; + } + + err = input_register_device(button->idev); + if (err) { + dev_err(&pdev->dev, "Input register failed: %d\n", err); + return err; + } + + device_init_wakeup(&pdev->dev, true); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id cpcap_pwrbutton_dt_match_table[] = { + { .compatible = "motorola,cpcap-pwrbutton" }, + {}, +}; +MODULE_DEVICE_TABLE(of, cpcap_pwrbutton_dt_match_table); +#endif + +static struct platform_driver cpcap_power_button_driver = { + .probe = cpcap_power_button_probe, + .driver = { + .name = "cpcap-pwrbutton", + .of_match_table = of_match_ptr(cpcap_pwrbutton_dt_match_table), + }, +}; +module_platform_driver(cpcap_power_button_driver); + +MODULE_ALIAS("platform:cpcap-pwrbutton"); +MODULE_DESCRIPTION("CPCAP Power Button"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Sebastian Reichel "); -- 2.7.4