diff options
author | Markus Schneider-Pargmann <msp@baylibre.com> | 2022-11-04 18:23:10 +0300 |
---|---|---|
committer | Lee Jones <lee@kernel.org> | 2022-12-07 16:28:15 +0300 |
commit | c8cf6e2328ce42ba016f6c321ba663d07e6f70ff (patch) | |
tree | 77a8921e65fba91e61d2d39869d52d0eca2aeb9a /drivers | |
parent | 74c17a0a49a6ad3b32cb130f25196d1f8d5d560e (diff) | |
download | linux-c8cf6e2328ce42ba016f6c321ba663d07e6f70ff.tar.xz |
Input: Add tps65219 interrupt driven powerbutton
TPS65219 has different interrupts compared to other TPS6521* chips.
TPS65219 defines two interrupts for the powerbutton one for push and one
for release.
This driver is very simple in that it maps the push interrupt to a key
input and the release interrupt to a key release.
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Signed-off-by: Jerome Neanne <jneanne@baylibre.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20221104152311.1098603-6-jneanne@baylibre.com
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/input/misc/Kconfig | 10 | ||||
-rw-r--r-- | drivers/input/misc/Makefile | 1 | ||||
-rw-r--r-- | drivers/input/misc/tps65219-pwrbutton.c | 148 |
3 files changed, 159 insertions, 0 deletions
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 540633b164d4..006335142491 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -468,6 +468,16 @@ config INPUT_TPS65218_PWRBUTTON To compile this driver as a module, choose M here. The module will be called tps65218-pwrbutton. +config INPUT_TPS65219_PWRBUTTON + tristate "TPS65219 Power button driver" + depends on MFD_TPS65219 + help + Say Y here if you want to enable power button reporting for + TPS65219 Power Management IC devices. + + To compile this driver as a module, choose M here. The module will + be called tps65219-pwrbutton. + config INPUT_AXP20X_PEK tristate "X-Powers AXP20X power button driver" depends on MFD_AXP20X diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 156f9c21f53b..61949263300d 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -79,6 +79,7 @@ obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o obj-$(CONFIG_INPUT_STPMIC1_ONKEY) += stpmic1_onkey.o obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o +obj-$(CONFIG_INPUT_TPS65219_PWRBUTTON) += tps65219-pwrbutton.o obj-$(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/tps65219-pwrbutton.c b/drivers/input/misc/tps65219-pwrbutton.c new file mode 100644 index 000000000000..245134bdb59e --- /dev/null +++ b/drivers/input/misc/tps65219-pwrbutton.c @@ -0,0 +1,148 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Driver for TPS65219 Push Button +// +// Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/ + +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/tps65219.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +struct tps65219_pwrbutton { + struct device *dev; + struct input_dev *idev; + char phys[32]; +}; + +static irqreturn_t tps65219_pb_push_irq(int irq, void *_pwr) +{ + struct tps65219_pwrbutton *pwr = _pwr; + + input_report_key(pwr->idev, KEY_POWER, 1); + pm_wakeup_event(pwr->dev, 0); + input_sync(pwr->idev); + + return IRQ_HANDLED; +} + +static irqreturn_t tps65219_pb_release_irq(int irq, void *_pwr) +{ + struct tps65219_pwrbutton *pwr = _pwr; + + input_report_key(pwr->idev, KEY_POWER, 0); + input_sync(pwr->idev); + + return IRQ_HANDLED; +} + +static int tps65219_pb_probe(struct platform_device *pdev) +{ + struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent); + struct device *dev = &pdev->dev; + struct tps65219_pwrbutton *pwr; + struct input_dev *idev; + int error; + int push_irq; + int release_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 = pdev->name; + snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0", + pdev->name); + idev->phys = pwr->phys; + idev->id.bustype = BUS_I2C; + + input_set_capability(idev, EV_KEY, KEY_POWER); + + pwr->dev = dev; + pwr->idev = idev; + device_init_wakeup(dev, true); + + push_irq = platform_get_irq(pdev, 0); + if (push_irq < 0) + return -EINVAL; + + release_irq = platform_get_irq(pdev, 1); + if (release_irq < 0) + return -EINVAL; + + error = devm_request_threaded_irq(dev, push_irq, NULL, + tps65219_pb_push_irq, + IRQF_ONESHOT, + dev->init_name, pwr); + if (error) { + dev_err(dev, "failed to request push IRQ #%d: %d\n", push_irq, + error); + return error; + } + + error = devm_request_threaded_irq(dev, release_irq, NULL, + tps65219_pb_release_irq, + IRQF_ONESHOT, + dev->init_name, pwr); + if (error) { + dev_err(dev, "failed to request release IRQ #%d: %d\n", + release_irq, error); + return error; + } + + error = input_register_device(idev); + if (error) { + dev_err(dev, "Can't register power button: %d\n", error); + return error; + } + + /* Enable interrupts for the pushbutton */ + regmap_clear_bits(tps->regmap, TPS65219_REG_MASK_CONFIG, + TPS65219_REG_MASK_INT_FOR_PB_MASK); + + /* Set PB/EN/VSENSE pin to be a pushbutton */ + regmap_update_bits(tps->regmap, TPS65219_REG_MFP_2_CONFIG, + TPS65219_MFP_2_EN_PB_VSENSE_MASK, TPS65219_MFP_2_PB); + + return 0; +} + +static int tps65219_pb_remove(struct platform_device *pdev) +{ + struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent); + + /* Disable interrupt for the pushbutton */ + return regmap_update_bits(tps->regmap, TPS65219_REG_MASK_CONFIG, + TPS65219_REG_MASK_INT_FOR_PB_MASK, + TPS65219_REG_MASK_INT_FOR_PB_MASK); +} + +static const struct platform_device_id tps65219_pwrbtn_id_table[] = { + { "tps65219-pwrbutton", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, tps65219_pwrbtn_id_table); + +static struct platform_driver tps65219_pb_driver = { + .probe = tps65219_pb_probe, + .remove = tps65219_pb_remove, + .driver = { + .name = "tps65219_pwrbutton", + }, + .id_table = tps65219_pwrbtn_id_table, +}; +module_platform_driver(tps65219_pb_driver); + +MODULE_DESCRIPTION("TPS65219 Power Button"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com"); |