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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/iio/adc/max1363.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12  /*
23   * iio/adc/max1363.c
34   * Copyright (C) 2008-2010 Jonathan Cameron
....@@ -9,10 +10,6 @@
910   * Copyright (C) 2000 Russell King
1011   *
1112   * Driver for max1363 and similar chips.
12
-  *
13
-  * This program is free software; you can redistribute it and/or modify
14
-  * it under the terms of the GNU General Public License version 2 as
15
-  * published by the Free Software Foundation.
1613   */
1714 
1815 #include <linux/interrupt.h>
....@@ -25,8 +22,8 @@
2522 #include <linux/slab.h>
2623 #include <linux/err.h>
2724 #include <linux/module.h>
28
-#include <linux/of.h>
29
-#include <linux/of_device.h>
25
+#include <linux/mod_devicetable.h>
26
+#include <linux/property.h>
3027 
3128 #include <linux/iio/iio.h>
3229 #include <linux/iio/sysfs.h>
....@@ -153,6 +150,7 @@
153150  * @current_mode:	the scan mode of this chip
154151  * @requestedmask:	a valid requested set of channels
155152  * @reg:		supply regulator
153
+ * @lock:		lock to ensure state is consistent
156154  * @monitor_on:		whether monitor mode is enabled
157155  * @monitor_speed:	parameter corresponding to device monitor speed setting
158156  * @mask_high:		bitmask for enabled high thresholds
....@@ -172,6 +170,7 @@
172170 	const struct max1363_mode	*current_mode;
173171 	u32				requestedmask;
174172 	struct regulator		*reg;
173
+	struct mutex			lock;
175174 
176175 	/* Using monitor modes and buffer at the same time is
177176 	   currently not supported */
....@@ -367,7 +366,11 @@
367366 	struct max1363_state *st = iio_priv(indio_dev);
368367 	struct i2c_client *client = st->client;
369368 
370
-	mutex_lock(&indio_dev->mlock);
369
+	ret = iio_device_claim_direct_mode(indio_dev);
370
+	if (ret)
371
+		return ret;
372
+	mutex_lock(&st->lock);
373
+
371374 	/*
372375 	 * If monitor mode is enabled, the method for reading a single
373376 	 * channel will have to be rather different and has not yet
....@@ -375,7 +378,7 @@
375378 	 *
376379 	 * Also, cannot read directly if buffered capture enabled.
377380 	 */
378
-	if (st->monitor_on || iio_buffer_enabled(indio_dev)) {
381
+	if (st->monitor_on) {
379382 		ret = -EBUSY;
380383 		goto error_ret;
381384 	}
....@@ -407,8 +410,10 @@
407410 		data = rxbuf[0];
408411 	}
409412 	*val = data;
413
+
410414 error_ret:
411
-	mutex_unlock(&indio_dev->mlock);
415
+	mutex_unlock(&st->lock);
416
+	iio_device_release_direct_mode(indio_dev);
412417 	return ret;
413418 
414419 }
....@@ -708,9 +713,9 @@
708713 	if (!found)
709714 		return -EINVAL;
710715 
711
-	mutex_lock(&indio_dev->mlock);
716
+	mutex_lock(&st->lock);
712717 	st->monitor_speed = i;
713
-	mutex_unlock(&indio_dev->mlock);
718
+	mutex_unlock(&st->lock);
714719 
715720 	return 0;
716721 }
....@@ -813,12 +818,12 @@
813818 	int val;
814819 	int number = chan->channel;
815820 
816
-	mutex_lock(&indio_dev->mlock);
821
+	mutex_lock(&st->lock);
817822 	if (dir == IIO_EV_DIR_FALLING)
818823 		val = (1 << number) & st->mask_low;
819824 	else
820825 		val = (1 << number) & st->mask_high;
821
-	mutex_unlock(&indio_dev->mlock);
826
+	mutex_unlock(&st->lock);
822827 
823828 	return val;
824829 }
....@@ -965,7 +970,11 @@
965970 	u16 unifiedmask;
966971 	int number = chan->channel;
967972 
968
-	mutex_lock(&indio_dev->mlock);
973
+	ret = iio_device_claim_direct_mode(indio_dev);
974
+	if (ret)
975
+		return ret;
976
+	mutex_lock(&st->lock);
977
+
969978 	unifiedmask = st->mask_low | st->mask_high;
970979 	if (dir == IIO_EV_DIR_FALLING) {
971980 
....@@ -992,7 +1001,8 @@
9921001 
9931002 	max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low));
9941003 error_ret:
995
-	mutex_unlock(&indio_dev->mlock);
1004
+	mutex_unlock(&st->lock);
1005
+	iio_device_release_direct_mode(indio_dev);
9961006 
9971007 	return ret;
9981008 }
....@@ -1519,8 +1529,6 @@
15191529 	return IRQ_HANDLED;
15201530 }
15211531 
1522
-#ifdef CONFIG_OF
1523
-
15241532 #define MAX1363_COMPATIBLE(of_compatible, cfg) {		\
15251533 			.compatible = of_compatible,		\
15261534 			.data = &max1363_chip_info_tbl[cfg],	\
....@@ -1568,7 +1576,6 @@
15681576 	{ /* sentinel */ }
15691577 };
15701578 MODULE_DEVICE_TABLE(of, max1363_of_match);
1571
-#endif
15721579 
15731580 static int max1363_probe(struct i2c_client *client,
15741581 			 const struct i2c_device_id *id)
....@@ -1583,13 +1590,13 @@
15831590 	if (!indio_dev)
15841591 		return -ENOMEM;
15851592 
1586
-	indio_dev->dev.of_node = client->dev.of_node;
15871593 	ret = iio_map_array_register(indio_dev, client->dev.platform_data);
15881594 	if (ret < 0)
15891595 		return ret;
15901596 
15911597 	st = iio_priv(indio_dev);
15921598 
1599
+	mutex_init(&st->lock);
15931600 	st->reg = devm_regulator_get(&client->dev, "vcc");
15941601 	if (IS_ERR(st->reg)) {
15951602 		ret = PTR_ERR(st->reg);
....@@ -1603,7 +1610,7 @@
16031610 	/* this is only used for device removal purposes */
16041611 	i2c_set_clientdata(client, indio_dev);
16051612 
1606
-	st->chip_info = of_device_get_match_data(&client->dev);
1613
+	st->chip_info = device_get_match_data(&client->dev);
16071614 	if (!st->chip_info)
16081615 		st->chip_info = &max1363_chip_info_tbl[id->driver_data];
16091616 	st->client = client;
....@@ -1641,9 +1648,6 @@
16411648 	if (ret)
16421649 		goto error_disable_reg;
16431650 
1644
-	/* Establish that the iio_dev is a child of the i2c device */
1645
-	indio_dev->dev.parent = &client->dev;
1646
-	indio_dev->dev.of_node = client->dev.of_node;
16471651 	indio_dev->name = id->name;
16481652 	indio_dev->channels = st->chip_info->channels;
16491653 	indio_dev->num_channels = st->chip_info->num_channels;
....@@ -1749,7 +1753,7 @@
17491753 static struct i2c_driver max1363_driver = {
17501754 	.driver = {
17511755 		.name = "max1363",
1752
-		.of_match_table = of_match_ptr(max1363_of_match),
1756
+		.of_match_table = max1363_of_match,
17531757 	},
17541758 	.probe = max1363_probe,
17551759 	.remove = max1363_remove,