Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c
new file mode 100644
index 000000000..3d99b5138
--- /dev/null
+++ b/drivers/media/rc/gpio-ir-recv.c
@@ -0,0 +1,158 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <media/rc-core.h>
+
+#define GPIO_IR_DEVICE_NAME	"gpio_ir_recv"
+
+struct gpio_rc_dev {
+	struct rc_dev *rcdev;
+	struct gpio_desc *gpiod;
+	int irq;
+};
+
+static irqreturn_t gpio_ir_recv_irq(int irq, void *dev_id)
+{
+	int val;
+	struct gpio_rc_dev *gpio_dev = dev_id;
+
+	val = gpiod_get_value(gpio_dev->gpiod);
+	if (val >= 0)
+		ir_raw_event_store_edge(gpio_dev->rcdev, val == 1);
+
+	return IRQ_HANDLED;
+}
+
+static int gpio_ir_recv_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct gpio_rc_dev *gpio_dev;
+	struct rc_dev *rcdev;
+	int rc;
+
+	if (!np)
+		return -ENODEV;
+
+	gpio_dev = devm_kzalloc(dev, sizeof(*gpio_dev), GFP_KERNEL);
+	if (!gpio_dev)
+		return -ENOMEM;
+
+	gpio_dev->gpiod = devm_gpiod_get(dev, NULL, GPIOD_IN);
+	if (IS_ERR(gpio_dev->gpiod)) {
+		rc = PTR_ERR(gpio_dev->gpiod);
+		/* Just try again if this happens */
+		if (rc != -EPROBE_DEFER)
+			dev_err(dev, "error getting gpio (%d)\n", rc);
+		return rc;
+	}
+	gpio_dev->irq = gpiod_to_irq(gpio_dev->gpiod);
+	if (gpio_dev->irq < 0)
+		return gpio_dev->irq;
+
+	rcdev = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
+	if (!rcdev)
+		return -ENOMEM;
+
+	rcdev->priv = gpio_dev;
+	rcdev->device_name = GPIO_IR_DEVICE_NAME;
+	rcdev->input_phys = GPIO_IR_DEVICE_NAME "/input0";
+	rcdev->input_id.bustype = BUS_HOST;
+	rcdev->input_id.vendor = 0x0001;
+	rcdev->input_id.product = 0x0001;
+	rcdev->input_id.version = 0x0100;
+	rcdev->dev.parent = dev;
+	rcdev->driver_name = KBUILD_MODNAME;
+	rcdev->min_timeout = 1;
+	rcdev->timeout = IR_DEFAULT_TIMEOUT;
+	rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+	rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+	rcdev->map_name = of_get_property(np, "linux,rc-map-name", NULL);
+	if (!rcdev->map_name)
+		rcdev->map_name = RC_MAP_EMPTY;
+
+	gpio_dev->rcdev = rcdev;
+
+	rc = devm_rc_register_device(dev, rcdev);
+	if (rc < 0) {
+		dev_err(dev, "failed to register rc device (%d)\n", rc);
+		return rc;
+	}
+
+	platform_set_drvdata(pdev, gpio_dev);
+
+	return devm_request_irq(dev, gpio_dev->irq, gpio_ir_recv_irq,
+				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+				"gpio-ir-recv-irq", gpio_dev);
+}
+
+#ifdef CONFIG_PM
+static int gpio_ir_recv_suspend(struct device *dev)
+{
+	struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(gpio_dev->irq);
+	else
+		disable_irq(gpio_dev->irq);
+
+	return 0;
+}
+
+static int gpio_ir_recv_resume(struct device *dev)
+{
+	struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(gpio_dev->irq);
+	else
+		enable_irq(gpio_dev->irq);
+
+	return 0;
+}
+
+static const struct dev_pm_ops gpio_ir_recv_pm_ops = {
+	.suspend        = gpio_ir_recv_suspend,
+	.resume         = gpio_ir_recv_resume,
+};
+#endif
+
+static const struct of_device_id gpio_ir_recv_of_match[] = {
+	{ .compatible = "gpio-ir-receiver", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, gpio_ir_recv_of_match);
+
+static struct platform_driver gpio_ir_recv_driver = {
+	.probe  = gpio_ir_recv_probe,
+	.driver = {
+		.name   = KBUILD_MODNAME,
+		.of_match_table = of_match_ptr(gpio_ir_recv_of_match),
+#ifdef CONFIG_PM
+		.pm	= &gpio_ir_recv_pm_ops,
+#endif
+	},
+};
+module_platform_driver(gpio_ir_recv_driver);
+
+MODULE_DESCRIPTION("GPIO IR Receiver driver");
+MODULE_LICENSE("GPL v2");