Merge branch 'next' into for-linus

Prepare second round of input updates for 5.3 merge window.

8 files changed, 349 insertions, 62 deletions

diff --git a/drivers/iio/proximity/Kconfig b/drivers/iio/proximity/Kconfig
index b99367a89f81..6b5cce6f1a7b 100644
--- a/drivers/iio/proximity/Kconfig
+++ b/drivers/iio/proximity/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Proximity sensors
 #
@@ -45,6 +46,18 @@ config LIDAR_LITE_V2
 	  To compile this driver as a module, choose M here: the
 	  module will be called pulsedlight-lite-v2
 
+config MB1232
+	tristate "MaxSonar I2CXL family ultrasonic sensors"
+	depends on I2C
+	help
+	  Say Y to build a driver for the ultrasonic sensors I2CXL of
+	  MaxBotix which have an i2c interface. It can be used to measure
+	  the distance of objects. Supported types are mb1202, mb1212,
+	  mb1222, mb1232, mb1242, mb7040, mb7137
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mb1232.
+
 config RFD77402
 	tristate "RFD77402 ToF sensor"
 	depends on I2C
@@ -56,12 +69,19 @@ config RFD77402
 	  module will be called rfd77402.
 
 config SRF04
-	tristate "Devantech SRF04 ultrasonic ranger sensor"
+	tristate "GPIO bitbanged ultrasonic ranger sensor (SRF04, MB1000)"
 	depends on GPIOLIB
 	help
-	  Say Y here to build a driver for Devantech SRF04 ultrasonic
+	  Say Y here to build a driver for GPIO bitbanged ultrasonic
 	  ranger sensor. This driver can be used to measure the distance
 	  of objects. It is using two GPIOs.
+	  Actually Supported types are:
+	  - Devantech SRF04
+	  - Maxbotix mb1000
+	  - Maxbotix mb1010
+	  - Maxbotix mb1020
+	  - Maxbotix mb1030
+	  - Maxbotix mb1040
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called srf04.
diff --git a/drivers/iio/proximity/Makefile b/drivers/iio/proximity/Makefile
index 6d031f903c4c..0bb5f9de13d6 100644
--- a/drivers/iio/proximity/Makefile
+++ b/drivers/iio/proximity/Makefile
@@ -7,6 +7,7 @@
 obj-$(CONFIG_AS3935)		+= as3935.o
 obj-$(CONFIG_ISL29501)		+= isl29501.o
 obj-$(CONFIG_LIDAR_LITE_V2)	+= pulsedlight-lidar-lite-v2.o
+obj-$(CONFIG_MB1232)		+= mb1232.o
 obj-$(CONFIG_RFD77402)		+= rfd77402.o
 obj-$(CONFIG_SRF04)		+= srf04.o
 obj-$(CONFIG_SRF08)		+= srf08.o
diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c
index f130388a16a0..b591c63bd6c4 100644
--- a/drivers/iio/proximity/as3935.c
+++ b/drivers/iio/proximity/as3935.c
@@ -345,6 +345,14 @@ static SIMPLE_DEV_PM_OPS(as3935_pm_ops, as3935_suspend, as3935_resume);
 #define AS3935_PM_OPS NULL
 #endif
 
+static void as3935_stop_work(void *data)
+{
+	struct iio_dev *indio_dev = data;
+	struct as3935_state *st = iio_priv(indio_dev);
+
+	cancel_delayed_work_sync(&st->work);
+}
+
 static int as3935_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
@@ -368,7 +376,6 @@ static int as3935_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 	mutex_init(&st->lock);
-	INIT_DELAYED_WORK(&st->work, as3935_event_work);
 
 	ret = of_property_read_u32(np,
 			"ams,tuning-capacitor-pf", &st->tune_cap);
@@ -414,22 +421,28 @@ static int as3935_probe(struct spi_device *spi)
 	iio_trigger_set_drvdata(trig, indio_dev);
 	trig->ops = &iio_interrupt_trigger_ops;
 
-	ret = iio_trigger_register(trig);
+	ret = devm_iio_trigger_register(&spi->dev, trig);
 	if (ret) {
 		dev_err(&spi->dev, "failed to register trigger\n");
 		return ret;
 	}
 
-	ret = iio_triggered_buffer_setup(indio_dev, iio_pollfunc_store_time,
-		&as3935_trigger_handler, NULL);
+	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+					      iio_pollfunc_store_time,
+					      as3935_trigger_handler, NULL);
 
 	if (ret) {
 		dev_err(&spi->dev, "cannot setup iio trigger\n");
-		goto unregister_trigger;
+		return ret;
 	}
 
 	calibrate_as3935(st);
 
+	INIT_DELAYED_WORK(&st->work, as3935_event_work);
+	ret = devm_add_action(&spi->dev, as3935_stop_work, indio_dev);
+	if (ret)
+		return ret;
+
 	ret = devm_request_irq(&spi->dev, spi->irq,
 				&as3935_interrupt_handler,
 				IRQF_TRIGGER_RISING,
@@ -438,35 +451,15 @@ static int as3935_probe(struct spi_device *spi)
 
 	if (ret) {
 		dev_err(&spi->dev, "unable to request irq\n");
-		goto unregister_buffer;
+		return ret;
 	}
 
-	ret = iio_device_register(indio_dev);
+	ret = devm_iio_device_register(&spi->dev, indio_dev);
 	if (ret < 0) {
 		dev_err(&spi->dev, "unable to register device\n");
-		goto unregister_buffer;
+		return ret;
 	}
 	return 0;
-
-unregister_buffer:
-	iio_triggered_buffer_cleanup(indio_dev);
-
-unregister_trigger:
-	iio_trigger_unregister(st->trig);
-
-	return ret;
-}
-
-static int as3935_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct as3935_state *st = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-	iio_triggered_buffer_cleanup(indio_dev);
-	iio_trigger_unregister(st->trig);
-
-	return 0;
 }
 
 static const struct of_device_id as3935_of_match[] = {
@@ -488,7 +481,6 @@ static struct spi_driver as3935_driver = {
 		.pm	= AS3935_PM_OPS,
 	},
 	.probe		= as3935_probe,
-	.remove		= as3935_remove,
 	.id_table	= as3935_id,
 };
 module_spi_driver(as3935_driver);
diff --git a/drivers/iio/proximity/mb1232.c b/drivers/iio/proximity/mb1232.c
new file mode 100644
index 000000000000..166b3e6d7db8
--- /dev/null
+++ b/drivers/iio/proximity/mb1232.c
@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * mb1232.c - Support for MaxBotix I2CXL-MaxSonar-EZ series ultrasonic
+ *   ranger with i2c interface
+ * actually tested with mb1232 type
+ *
+ * Copyright (c) 2019 Andreas Klinger <ak@it-klinger.de>
+ *
+ * For details about the device see:
+ * https://www.maxbotix.com/documents/I2CXL-MaxSonar-EZ_Datasheet.pdf
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/of_irq.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+/* registers of MaxSonar device */
+#define MB1232_RANGE_COMMAND	0x51	/* Command for reading range */
+#define MB1232_ADDR_UNLOCK_1	0xAA	/* Command 1 for changing address */
+#define MB1232_ADDR_UNLOCK_2	0xA5	/* Command 2 for changing address */
+
+struct mb1232_data {
+	struct i2c_client	*client;
+
+	struct mutex		lock;
+
+	/*
+	 * optionally a gpio can be used to announce when ranging has
+	 * finished
+	 * since we are just using the falling trigger of it we request
+	 * only the interrupt for announcing when data is ready to be read
+	 */
+	struct completion	ranging;
+	int			irqnr;
+};
+
+static irqreturn_t mb1232_handle_irq(int irq, void *dev_id)
+{
+	struct iio_dev *indio_dev = dev_id;
+	struct mb1232_data *data = iio_priv(indio_dev);
+
+	complete(&data->ranging);
+
+	return IRQ_HANDLED;
+}
+
+static s16 mb1232_read_distance(struct mb1232_data *data)
+{
+	struct i2c_client *client = data->client;
+	int ret;
+	s16 distance;
+	__be16 buf;
+
+	mutex_lock(&data->lock);
+
+	reinit_completion(&data->ranging);
+
+	ret = i2c_smbus_write_byte(client, MB1232_RANGE_COMMAND);
+	if (ret < 0) {
+		dev_err(&client->dev, "write command - err: %d\n", ret);
+		goto error_unlock;
+	}
+
+	if (data->irqnr >= 0) {
+		/* it cannot take more than 100 ms */
+		ret = wait_for_completion_killable_timeout(&data->ranging,
+									HZ/10);
+		if (ret < 0)
+			goto error_unlock;
+		else if (ret == 0) {
+			ret = -ETIMEDOUT;
+			goto error_unlock;
+		}
+	} else {
+		/* use simple sleep if announce irq is not connected */
+		msleep(15);
+	}
+
+	ret = i2c_master_recv(client, (char *)&buf, sizeof(buf));
+	if (ret < 0) {
+		dev_err(&client->dev, "i2c_master_recv: ret=%d\n", ret);
+		goto error_unlock;
+	}
+
+	distance = __be16_to_cpu(buf);
+	/* check for not returning misleading error codes */
+	if (distance < 0) {
+		dev_err(&client->dev, "distance=%d\n", distance);
+		ret = -EINVAL;
+		goto error_unlock;
+	}
+
+	mutex_unlock(&data->lock);
+
+	return distance;
+
+error_unlock:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static irqreturn_t mb1232_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct mb1232_data *data = iio_priv(indio_dev);
+	/*
+	 * triggered buffer
+	 * 16-bit channel + 48-bit padding + 64-bit timestamp
+	 */
+	s16 buffer[8] = { 0 };
+
+	buffer[0] = mb1232_read_distance(data);
+	if (buffer[0] < 0)
+		goto err;
+
+	iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);
+
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+	return IRQ_HANDLED;
+}
+
+static int mb1232_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *channel, int *val,
+			    int *val2, long mask)
+{
+	struct mb1232_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (channel->type != IIO_DISTANCE)
+		return -EINVAL;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = mb1232_read_distance(data);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		/* 1 LSB is 1 cm */
+		*val = 0;
+		*val2 = 10000;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_chan_spec mb1232_channels[] = {
+	{
+		.type = IIO_DISTANCE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 's',
+			.realbits = 16,
+			.storagebits = 16,
+			.endianness = IIO_CPU,
+		},
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct iio_info mb1232_info = {
+	.read_raw = mb1232_read_raw,
+};
+
+static int mb1232_probe(struct i2c_client *client,
+					 const struct i2c_device_id *id)
+{
+	struct iio_dev *indio_dev;
+	struct mb1232_data *data;
+	int ret;
+	struct device *dev = &client->dev;
+
+	if (!i2c_check_functionality(client->adapter,
+					I2C_FUNC_SMBUS_READ_BYTE |
+					I2C_FUNC_SMBUS_WRITE_BYTE))
+		return -ENODEV;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	indio_dev->info = &mb1232_info;
+	indio_dev->name = id->name;
+	indio_dev->dev.parent = dev;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = mb1232_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mb1232_channels);
+
+	mutex_init(&data->lock);
+
+	init_completion(&data->ranging);
+
+	data->irqnr = irq_of_parse_and_map(dev->of_node, 0);
+	if (data->irqnr <= 0) {
+		/* usage of interrupt is optional */
+		data->irqnr = -1;
+	} else {
+		ret = devm_request_irq(dev, data->irqnr, mb1232_handle_irq,
+				IRQF_TRIGGER_FALLING, id->name, indio_dev);
+		if (ret < 0) {
+			dev_err(dev, "request_irq: %d\n", ret);
+			return ret;
+		}
+	}
+
+	ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
+			iio_pollfunc_store_time, mb1232_trigger_handler, NULL);
+	if (ret < 0) {
+		dev_err(dev, "setup of iio triggered buffer failed\n");
+		return ret;
+	}
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct of_device_id of_mb1232_match[] = {
+	{ .compatible = "maxbotix,mb1202", },
+	{ .compatible = "maxbotix,mb1212", },
+	{ .compatible = "maxbotix,mb1222", },
+	{ .compatible = "maxbotix,mb1232", },
+	{ .compatible = "maxbotix,mb1242", },
+	{ .compatible = "maxbotix,mb7040", },
+	{ .compatible = "maxbotix,mb7137", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, of_mb1232_match);
+
+static const struct i2c_device_id mb1232_id[] = {
+	{ "maxbotix-mb1202", },
+	{ "maxbotix-mb1212", },
+	{ "maxbotix-mb1222", },
+	{ "maxbotix-mb1232", },
+	{ "maxbotix-mb1242", },
+	{ "maxbotix-mb7040", },
+	{ "maxbotix-mb7137", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mb1232_id);
+
+static struct i2c_driver mb1232_driver = {
+	.driver = {
+		.name	= "maxbotix-mb1232",
+		.of_match_table	= of_mb1232_match,
+	},
+	.probe = mb1232_probe,
+	.id_table = mb1232_id,
+};
+module_i2c_driver(mb1232_driver);
+
+MODULE_AUTHOR("Andreas Klinger <ak@it-klinger.de>");
+MODULE_DESCRIPTION("Maxbotix I2CXL-MaxSonar i2c ultrasonic ranger driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/proximity/rfd77402.c b/drivers/iio/proximity/rfd77402.c
index fe29fb1a19a6..36480c0100a7 100644
--- a/drivers/iio/proximity/rfd77402.c
+++ b/drivers/iio/proximity/rfd77402.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * rfd77402.c - Support for RF Digital RFD77402 Time-of-Flight (distance) sensor
  *
  * Copyright 2017 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * 7-bit I2C slave address 0x4c
  *
  * TODO: interrupt
diff --git a/drivers/iio/proximity/srf04.c b/drivers/iio/proximity/srf04.c
index 09c7b9c095b0..8b50d56b0a03 100644
--- a/drivers/iio/proximity/srf04.c
+++ b/drivers/iio/proximity/srf04.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * SRF04: ultrasonic sensor for distance measuring by using GPIOs
  *
  * Copyright (c) 2017 Andreas Klinger <ak@it-klinger.de>
  *
- * 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.
- *
  * For details about the device see:
  * http://www.robot-electronics.co.uk/htm/srf04tech.htm
  *
@@ -23,7 +14,7 @@
  * trig:  --+   +------------------------------------------------------
  *          ^   ^
  *          |<->|
- *         udelay(10)
+ *         udelay(trigger_pulse_us)
  *
  * ultra           +-+ +-+ +-+
  * sonic           | | | | | |
@@ -48,6 +39,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/sched.h>
@@ -56,6 +48,10 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 
+struct srf04_cfg {
+	unsigned long trigger_pulse_us;
+};
+
 struct srf04_data {
 	struct device		*dev;
 	struct gpio_desc	*gpiod_trig;
@@ -66,6 +62,15 @@ struct srf04_data {
 	ktime_t			ts_falling;
 	struct completion	rising;
 	struct completion	falling;
+	const struct srf04_cfg	*cfg;
+};
+
+static const struct srf04_cfg srf04_cfg = {
+	.trigger_pulse_us = 10,
+};
+
+static const struct srf04_cfg mb_lv_cfg = {
+	.trigger_pulse_us = 20,
 };
 
 static irqreturn_t srf04_handle_irq(int irq, void *dev_id)
@@ -102,7 +107,7 @@ static int srf04_read(struct srf04_data *data)
 	reinit_completion(&data->falling);
 
 	gpiod_set_value(data->gpiod_trig, 1);
-	udelay(10);
+	udelay(data->cfg->trigger_pulse_us);
 	gpiod_set_value(data->gpiod_trig, 0);
 
 	/* it cannot take more than 20 ms */
@@ -215,6 +220,18 @@ static const struct iio_chan_spec srf04_chan_spec[] = {
 	},
 };
 
+static const struct of_device_id of_srf04_match[] = {
+	{ .compatible = "devantech,srf04", .data = &srf04_cfg},
+	{ .compatible = "maxbotix,mb1000", .data = &mb_lv_cfg},
+	{ .compatible = "maxbotix,mb1010", .data = &mb_lv_cfg},
+	{ .compatible = "maxbotix,mb1020", .data = &mb_lv_cfg},
+	{ .compatible = "maxbotix,mb1030", .data = &mb_lv_cfg},
+	{ .compatible = "maxbotix,mb1040", .data = &mb_lv_cfg},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, of_srf04_match);
+
 static int srf04_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -230,6 +247,7 @@ static int srf04_probe(struct platform_device *pdev)
 
 	data = iio_priv(indio_dev);
 	data->dev = dev;
+	data->cfg = of_match_device(of_srf04_match, dev)->data;
 
 	mutex_init(&data->lock);
 	init_completion(&data->rising);
@@ -280,13 +298,6 @@ static int srf04_probe(struct platform_device *pdev)
 	return devm_iio_device_register(dev, indio_dev);
 }
 
-static const struct of_device_id of_srf04_match[] = {
-	{ .compatible = "devantech,srf04", },
-	{},
-};
-
-MODULE_DEVICE_TABLE(of, of_srf04_match);
-
 static struct platform_driver srf04_driver = {
 	.probe		= srf04_probe,
 	.driver		= {
diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c
index f2bf783f829a..b23ce446b7be 100644
--- a/drivers/iio/proximity/srf08.c
+++ b/drivers/iio/proximity/srf08.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * srf08.c - Support for Devantech SRFxx ultrasonic ranger
  *           with i2c interface
@@ -5,10 +6,6 @@
  *
  * Copyright (c) 2016, 2017 Andreas Klinger <ak@it-klinger.de>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License. See the file COPYING in the main
- * directory of this archive for more details.
- *
  * For details about the device see:
  * http://www.robot-electronics.co.uk/htm/srf08tech.html
  * http://www.robot-electronics.co.uk/htm/srf10tech.htm
diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c
index ff80409e0c44..612f79c53cfc 100644
--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2014 Intel Corporation
  *
  * Driver for Semtech's SX9500 capacitive proximity/button solution.
  * Datasheet available at
  * <http://www.semtech.com/images/datasheet/sx9500.pdf>.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/kernel.h>