97fb5e8d9b
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 and only version 2 as published by the free software foundation 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 294 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/gpio/consumer.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <media/rc-core.h>
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#define GPIO_IR_DEVICE_NAME "gpio_ir_recv"
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struct gpio_rc_dev {
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struct rc_dev *rcdev;
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struct gpio_desc *gpiod;
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int irq;
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};
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static irqreturn_t gpio_ir_recv_irq(int irq, void *dev_id)
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{
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int val;
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struct gpio_rc_dev *gpio_dev = dev_id;
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val = gpiod_get_value(gpio_dev->gpiod);
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if (val >= 0)
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ir_raw_event_store_edge(gpio_dev->rcdev, val == 1);
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return IRQ_HANDLED;
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}
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static int gpio_ir_recv_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct gpio_rc_dev *gpio_dev;
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struct rc_dev *rcdev;
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int rc;
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if (!np)
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return -ENODEV;
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gpio_dev = devm_kzalloc(dev, sizeof(*gpio_dev), GFP_KERNEL);
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if (!gpio_dev)
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return -ENOMEM;
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gpio_dev->gpiod = devm_gpiod_get(dev, NULL, GPIOD_IN);
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if (IS_ERR(gpio_dev->gpiod)) {
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rc = PTR_ERR(gpio_dev->gpiod);
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/* Just try again if this happens */
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if (rc != -EPROBE_DEFER)
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dev_err(dev, "error getting gpio (%d)\n", rc);
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return rc;
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}
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gpio_dev->irq = gpiod_to_irq(gpio_dev->gpiod);
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if (gpio_dev->irq < 0)
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return gpio_dev->irq;
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rcdev = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
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if (!rcdev)
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return -ENOMEM;
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rcdev->priv = gpio_dev;
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rcdev->device_name = GPIO_IR_DEVICE_NAME;
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rcdev->input_phys = GPIO_IR_DEVICE_NAME "/input0";
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rcdev->input_id.bustype = BUS_HOST;
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rcdev->input_id.vendor = 0x0001;
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rcdev->input_id.product = 0x0001;
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rcdev->input_id.version = 0x0100;
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rcdev->dev.parent = dev;
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rcdev->driver_name = KBUILD_MODNAME;
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rcdev->min_timeout = 1;
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rcdev->timeout = IR_DEFAULT_TIMEOUT;
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rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
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rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
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rcdev->map_name = of_get_property(np, "linux,rc-map-name", NULL);
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if (!rcdev->map_name)
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rcdev->map_name = RC_MAP_EMPTY;
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gpio_dev->rcdev = rcdev;
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rc = devm_rc_register_device(dev, rcdev);
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if (rc < 0) {
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dev_err(dev, "failed to register rc device (%d)\n", rc);
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return rc;
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}
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platform_set_drvdata(pdev, gpio_dev);
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return devm_request_irq(dev, gpio_dev->irq, gpio_ir_recv_irq,
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IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
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"gpio-ir-recv-irq", gpio_dev);
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}
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#ifdef CONFIG_PM
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static int gpio_ir_recv_suspend(struct device *dev)
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{
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struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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enable_irq_wake(gpio_dev->irq);
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else
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disable_irq(gpio_dev->irq);
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return 0;
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}
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static int gpio_ir_recv_resume(struct device *dev)
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{
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struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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disable_irq_wake(gpio_dev->irq);
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else
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enable_irq(gpio_dev->irq);
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return 0;
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}
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static const struct dev_pm_ops gpio_ir_recv_pm_ops = {
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.suspend = gpio_ir_recv_suspend,
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.resume = gpio_ir_recv_resume,
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};
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#endif
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static const struct of_device_id gpio_ir_recv_of_match[] = {
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{ .compatible = "gpio-ir-receiver", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, gpio_ir_recv_of_match);
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static struct platform_driver gpio_ir_recv_driver = {
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.probe = gpio_ir_recv_probe,
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.driver = {
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.name = KBUILD_MODNAME,
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.of_match_table = of_match_ptr(gpio_ir_recv_of_match),
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#ifdef CONFIG_PM
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.pm = &gpio_ir_recv_pm_ops,
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#endif
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},
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};
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module_platform_driver(gpio_ir_recv_driver);
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MODULE_DESCRIPTION("GPIO IR Receiver driver");
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MODULE_LICENSE("GPL v2");
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