These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 305 insertions, 0 deletions

diff --git a/kernel/drivers/input/misc/da9063_onkey.c b/kernel/drivers/input/misc/da9063_onkey.c
new file mode 100644
index 000000000..8eb697db8
--- /dev/null
+++ b/kernel/drivers/input/misc/da9063_onkey.c
@@ -0,0 +1,305 @@
+/*
+ * OnKey device driver for DA9063 and DA9062 PMICs
+ * Copyright (C) 2015  Dialog Semiconductor Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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/module.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+#include <linux/mfd/da9063/core.h>
+#include <linux/mfd/da9063/pdata.h>
+#include <linux/mfd/da9063/registers.h>
+#include <linux/mfd/da9062/core.h>
+#include <linux/mfd/da9062/registers.h>
+
+struct da906x_chip_config {
+	/* REGS */
+	int onkey_status;
+	int onkey_pwr_signalling;
+	int onkey_fault_log;
+	int onkey_shutdown;
+	/* MASKS */
+	int onkey_nonkey_mask;
+	int onkey_nonkey_lock_mask;
+	int onkey_key_reset_mask;
+	int onkey_shutdown_mask;
+	/* NAMES */
+	const char *name;
+};
+
+struct da9063_onkey {
+	struct delayed_work work;
+	struct input_dev *input;
+	struct device *dev;
+	struct regmap *regmap;
+	const struct da906x_chip_config *config;
+	char phys[32];
+	bool key_power;
+};
+
+static const struct da906x_chip_config da9063_regs = {
+	/* REGS */
+	.onkey_status = DA9063_REG_STATUS_A,
+	.onkey_pwr_signalling = DA9063_REG_CONTROL_B,
+	.onkey_fault_log = DA9063_REG_FAULT_LOG,
+	.onkey_shutdown = DA9063_REG_CONTROL_F,
+	/* MASKS */
+	.onkey_nonkey_mask = DA9063_NONKEY,
+	.onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
+	.onkey_key_reset_mask = DA9063_KEY_RESET,
+	.onkey_shutdown_mask = DA9063_SHUTDOWN,
+	/* NAMES */
+	.name = DA9063_DRVNAME_ONKEY,
+};
+
+static const struct da906x_chip_config da9062_regs = {
+	/* REGS */
+	.onkey_status = DA9062AA_STATUS_A,
+	.onkey_pwr_signalling = DA9062AA_CONTROL_B,
+	.onkey_fault_log = DA9062AA_FAULT_LOG,
+	.onkey_shutdown = DA9062AA_CONTROL_F,
+	/* MASKS */
+	.onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
+	.onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
+	.onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
+	.onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
+	/* NAMES */
+	.name = "da9062-onkey",
+};
+
+static const struct of_device_id da9063_compatible_reg_id_table[] = {
+	{ .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
+	{ .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
+	{ },
+};
+
+static void da9063_poll_on(struct work_struct *work)
+{
+	struct da9063_onkey *onkey = container_of(work,
+						struct da9063_onkey,
+						work.work);
+	const struct da906x_chip_config *config = onkey->config;
+	unsigned int val;
+	int fault_log = 0;
+	bool poll = true;
+	int error;
+
+	/* Poll to see when the pin is released */
+	error = regmap_read(onkey->regmap,
+			    config->onkey_status,
+			    &val);
+	if (error) {
+		dev_err(onkey->dev,
+			"Failed to read ON status: %d\n", error);
+		goto err_poll;
+	}
+
+	if (!(val & config->onkey_nonkey_mask)) {
+		error = regmap_update_bits(onkey->regmap,
+					   config->onkey_pwr_signalling,
+					   config->onkey_nonkey_lock_mask,
+					   0);
+		if (error) {
+			dev_err(onkey->dev,
+				"Failed to reset the Key Delay %d\n", error);
+			goto err_poll;
+		}
+
+		input_report_key(onkey->input, KEY_POWER, 0);
+		input_sync(onkey->input);
+
+		poll = false;
+	}
+
+	/*
+	 * If the fault log KEY_RESET is detected, then clear it
+	 * and shut down the system.
+	 */
+	error = regmap_read(onkey->regmap,
+			    config->onkey_fault_log,
+			    &fault_log);
+	if (error) {
+		dev_warn(&onkey->input->dev,
+			 "Cannot read FAULT_LOG: %d\n", error);
+	} else if (fault_log & config->onkey_key_reset_mask) {
+		error = regmap_write(onkey->regmap,
+				     config->onkey_fault_log,
+				     config->onkey_key_reset_mask);
+		if (error) {
+			dev_warn(&onkey->input->dev,
+				 "Cannot reset KEY_RESET fault log: %d\n",
+				 error);
+		} else {
+			/* at this point we do any S/W housekeeping
+			 * and then send shutdown command
+			 */
+			dev_dbg(&onkey->input->dev,
+				"Sending SHUTDOWN to DA9063 ...\n");
+			error = regmap_write(onkey->regmap,
+					     config->onkey_shutdown,
+					     config->onkey_shutdown_mask);
+			if (error)
+				dev_err(&onkey->input->dev,
+					"Cannot SHUTDOWN DA9063: %d\n",
+					error);
+		}
+	}
+
+err_poll:
+	if (poll)
+		schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
+}
+
+static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
+{
+	struct da9063_onkey *onkey = data;
+	const struct da906x_chip_config *config = onkey->config;
+	unsigned int val;
+	int error;
+
+	error = regmap_read(onkey->regmap,
+			    config->onkey_status,
+			    &val);
+	if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
+		input_report_key(onkey->input, KEY_POWER, 1);
+		input_sync(onkey->input);
+		schedule_delayed_work(&onkey->work, 0);
+		dev_dbg(onkey->dev, "KEY_POWER pressed.\n");
+	} else {
+		input_report_key(onkey->input, KEY_SLEEP, 1);
+		input_sync(onkey->input);
+		input_report_key(onkey->input, KEY_SLEEP, 0);
+		input_sync(onkey->input);
+		dev_dbg(onkey->dev, "KEY_SLEEP pressed.\n");
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void da9063_cancel_poll(void *data)
+{
+	struct da9063_onkey *onkey = data;
+
+	cancel_delayed_work_sync(&onkey->work);
+}
+
+static int da9063_onkey_probe(struct platform_device *pdev)
+{
+	struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
+	struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
+	struct da9063_onkey *onkey;
+	const struct of_device_id *match;
+	int irq;
+	int error;
+
+	match = of_match_node(da9063_compatible_reg_id_table,
+			      pdev->dev.of_node);
+	if (!match)
+		return -ENXIO;
+
+	onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
+			     GFP_KERNEL);
+	if (!onkey) {
+		dev_err(&pdev->dev, "Failed to allocate memory.\n");
+		return -ENOMEM;
+	}
+
+	onkey->config = match->data;
+	onkey->dev = &pdev->dev;
+
+	onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!onkey->regmap) {
+		dev_err(&pdev->dev, "Parent regmap unavailable.\n");
+		return -ENXIO;
+	}
+
+	if (pdata)
+		onkey->key_power = pdata->key_power;
+	else
+		onkey->key_power =
+			!of_property_read_bool(pdev->dev.of_node,
+					       "dlg,disable-key-power");
+
+	onkey->input = devm_input_allocate_device(&pdev->dev);
+	if (!onkey->input) {
+		dev_err(&pdev->dev, "Failed to allocated input device.\n");
+		return -ENOMEM;
+	}
+
+	onkey->input->name = onkey->config->name;
+	snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
+		 onkey->config->name);
+	onkey->input->phys = onkey->phys;
+	onkey->input->dev.parent = &pdev->dev;
+
+	if (onkey->key_power)
+		input_set_capability(onkey->input, EV_KEY, KEY_POWER);
+
+	input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
+
+	INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
+
+	error = devm_add_action(&pdev->dev, da9063_cancel_poll, onkey);
+	if (error) {
+		dev_err(&pdev->dev,
+			"Failed to add cancel poll action: %d\n",
+			error);
+		return error;
+	}
+
+	irq = platform_get_irq_byname(pdev, "ONKEY");
+	if (irq < 0) {
+		error = irq;
+		dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
+		return error;
+	}
+
+	error = devm_request_threaded_irq(&pdev->dev, irq,
+					  NULL, da9063_onkey_irq_handler,
+					  IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+					  "ONKEY", onkey);
+	if (error) {
+		dev_err(&pdev->dev,
+			"Failed to request IRQ %d: %d\n", irq, error);
+		return error;
+	}
+
+	error = input_register_device(onkey->input);
+	if (error) {
+		dev_err(&pdev->dev,
+			"Failed to register input device: %d\n", error);
+		return error;
+	}
+
+	platform_set_drvdata(pdev, onkey);
+	return 0;
+}
+
+static struct platform_driver da9063_onkey_driver = {
+	.probe	= da9063_onkey_probe,
+	.driver	= {
+		.name	= DA9063_DRVNAME_ONKEY,
+		.of_match_table = da9063_compatible_reg_id_table,
+	},
+};
+module_platform_driver(da9063_onkey_driver);
+
+MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
+MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063 and DA9062");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);