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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/input/misc/tps65218-pwrbutton.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/input/misc/tps65218-pwrbutton.c')
-rw-r--r-- | drivers/input/misc/tps65218-pwrbutton.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c new file mode 100644 index 000000000..fc450fce0 --- /dev/null +++ b/drivers/input/misc/tps65218-pwrbutton.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Felipe Balbi <balbi@ti.com> + * Author: Marcin Niestroj <m.niestroj@grinn-global.com> + */ + +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/tps65217.h> +#include <linux/mfd/tps65218.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +struct tps6521x_data { + unsigned int reg_status; + unsigned int pb_mask; + const char *name; +}; + +static const struct tps6521x_data tps65217_data = { + .reg_status = TPS65217_REG_STATUS, + .pb_mask = TPS65217_STATUS_PB, + .name = "tps65217_pwrbutton", +}; + +static const struct tps6521x_data tps65218_data = { + .reg_status = TPS65218_REG_STATUS, + .pb_mask = TPS65218_STATUS_PB_STATE, + .name = "tps65218_pwrbutton", +}; + +struct tps6521x_pwrbutton { + struct device *dev; + struct regmap *regmap; + struct input_dev *idev; + const struct tps6521x_data *data; + char phys[32]; +}; + +static const struct of_device_id of_tps6521x_pb_match[] = { + { .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data }, + { .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match); + +static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr) +{ + struct tps6521x_pwrbutton *pwr = _pwr; + const struct tps6521x_data *tps_data = pwr->data; + unsigned int reg; + int error; + + error = regmap_read(pwr->regmap, tps_data->reg_status, ®); + if (error) { + dev_err(pwr->dev, "can't read register: %d\n", error); + goto out; + } + + if (reg & tps_data->pb_mask) { + 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 tps6521x_pb_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tps6521x_pwrbutton *pwr; + struct input_dev *idev; + const struct of_device_id *match; + int error; + int irq; + + match = of_match_node(of_tps6521x_pb_match, dev->of_node); + if (!match) + return -ENXIO; + + pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL); + if (!pwr) + return -ENOMEM; + + pwr->data = match->data; + + idev = devm_input_allocate_device(dev); + if (!idev) + return -ENOMEM; + + idev->name = pwr->data->name; + snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0", + pwr->data->name); + idev->phys = pwr->phys; + idev->dev.parent = dev; + idev->id.bustype = BUS_I2C; + + input_set_capability(idev, EV_KEY, KEY_POWER); + + pwr->regmap = dev_get_regmap(dev->parent, NULL); + pwr->dev = dev; + pwr->idev = idev; + device_init_wakeup(dev, true); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -EINVAL; + + error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq, + IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + pwr->data->name, 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 platform_device_id tps6521x_pwrbtn_id_table[] = { + { "tps65218-pwrbutton", }, + { "tps65217-pwrbutton", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, tps6521x_pwrbtn_id_table); + +static struct platform_driver tps6521x_pb_driver = { + .probe = tps6521x_pb_probe, + .driver = { + .name = "tps6521x_pwrbutton", + .of_match_table = of_tps6521x_pb_match, + }, + .id_table = tps6521x_pwrbtn_id_table, +}; +module_platform_driver(tps6521x_pb_driver); + +MODULE_DESCRIPTION("TPS6521X Power Button"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |