Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / ab8500-ponkey.c

diff --git a/kernel/drivers/input/misc/ab8500-ponkey.c b/kernel/drivers/input/misc/ab8500-ponkey.c
new file mode 100644 (file)
index 0000000..1f7e15c
--- /dev/null
+++ b/kernel/drivers/input/misc/ab8500-ponkey.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
+ *
+ * AB8500 Power-On Key handler
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+/**
+ * struct ab8500_ponkey - ab8500 ponkey information
+ * @input_dev: pointer to input device
+ * @ab8500: ab8500 parent
+ * @irq_dbf: irq number for falling transition
+ * @irq_dbr: irq number for rising transition
+ */
+struct ab8500_ponkey {
+       struct input_dev        *idev;
+       struct ab8500           *ab8500;
+       int                     irq_dbf;
+       int                     irq_dbr;
+};
+
+/* AB8500 gives us an interrupt when ONKEY is held */
+static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
+{
+       struct ab8500_ponkey *ponkey = data;
+
+       if (irq == ponkey->irq_dbf)
+               input_report_key(ponkey->idev, KEY_POWER, true);
+       else if (irq == ponkey->irq_dbr)
+               input_report_key(ponkey->idev, KEY_POWER, false);
+
+       input_sync(ponkey->idev);
+
+       return IRQ_HANDLED;
+}
+
+static int ab8500_ponkey_probe(struct platform_device *pdev)
+{
+       struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
+       struct ab8500_ponkey *ponkey;
+       struct input_dev *input;
+       int irq_dbf, irq_dbr;
+       int error;
+
+       irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
+       if (irq_dbf < 0) {
+               dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
+               return irq_dbf;
+       }
+
+       irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
+       if (irq_dbr < 0) {
+               dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
+               return irq_dbr;
+       }
+
+       ponkey = devm_kzalloc(&pdev->dev, sizeof(struct ab8500_ponkey),
+                             GFP_KERNEL);
+       if (!ponkey)
+               return -ENOMEM;
+
+       input = devm_input_allocate_device(&pdev->dev);
+       if (!input)
+               return -ENOMEM;
+
+       ponkey->idev = input;
+       ponkey->ab8500 = ab8500;
+       ponkey->irq_dbf = irq_dbf;
+       ponkey->irq_dbr = irq_dbr;
+
+       input->name = "AB8500 POn(PowerOn) Key";
+       input->dev.parent = &pdev->dev;
+
+       input_set_capability(input, EV_KEY, KEY_POWER);
+
+       error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbf,
+                                            ab8500_ponkey_handler, 0,
+                                            "ab8500-ponkey-dbf", ponkey);
+       if (error < 0) {
+               dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
+                       ponkey->irq_dbf, error);
+               return error;
+       }
+
+       error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbr,
+                                            ab8500_ponkey_handler, 0,
+                                            "ab8500-ponkey-dbr", ponkey);
+       if (error < 0) {
+               dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
+                       ponkey->irq_dbr, error);
+               return error;
+       }
+
+       error = input_register_device(ponkey->idev);
+       if (error) {
+               dev_err(ab8500->dev, "Can't register input device: %d\n", error);
+               return error;
+       }
+
+       platform_set_drvdata(pdev, ponkey);
+       return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ab8500_ponkey_match[] = {
+       { .compatible = "stericsson,ab8500-ponkey", },
+       {}
+};
+#endif
+
+static struct platform_driver ab8500_ponkey_driver = {
+       .driver         = {
+               .name   = "ab8500-poweron-key",
+               .of_match_table = of_match_ptr(ab8500_ponkey_match),
+       },
+       .probe          = ab8500_ponkey_probe,
+};
+module_platform_driver(ab8500_ponkey_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
+MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");