staging: iio: tsl2x7x: don't setup event handlers if interrupts are not configured

The driver would expose to userspace the events directory even if the
interrupts were not configured. This patch changes the driver so that
the events directory is not exposed to user space if interrupts are
not configured. This patch also corrects the indentation of the
chan_table_elements and info structure members.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

1 files changed, 112 insertions, 18 deletions

diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
index b4d77f65ca12..7e8db5178a2c 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -134,8 +134,9 @@ struct tsl2x7x_als_info {
 
 struct tsl2x7x_chip_info {
 	int chan_table_elements;
-	struct iio_chan_spec		channel[4];
-	const struct iio_info		*info;
+	struct iio_chan_spec channel_with_events[4];
+	struct iio_chan_spec channel_without_events[4];
+	const struct iio_info *info;
 };
 
 struct tsl2X7X_chip {
@@ -1447,7 +1448,7 @@ static const struct iio_event_spec tsl2x7x_events[] = {
 
 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 	[ALS] = {
-		.channel = {
+		.channel_with_events = {
 			{
 			.type = IIO_LIGHT,
 			.indexed = 1,
@@ -1469,11 +1470,31 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.channel = 1,
 			},
 		},
-	.chan_table_elements = 3,
-	.info = &tsl2X7X_device_info[ALS],
+		.channel_without_events = {
+			{
+			.type = IIO_LIGHT,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_INT_TIME) |
+				BIT(IIO_CHAN_INFO_CALIBSCALE) |
+				BIT(IIO_CHAN_INFO_CALIBBIAS),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 1,
+			},
+		},
+		.chan_table_elements = 3,
+		.info = &tsl2X7X_device_info[ALS],
 	},
 	[PRX] = {
-		.channel = {
+		.channel_with_events = {
 			{
 			.type = IIO_PROXIMITY,
 			.indexed = 1,
@@ -1483,11 +1504,19 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.num_event_specs = ARRAY_SIZE(tsl2x7x_events),
 			},
 		},
-	.chan_table_elements = 1,
-	.info = &tsl2X7X_device_info[PRX],
+		.channel_without_events = {
+			{
+			.type = IIO_PROXIMITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+			},
+		},
+		.chan_table_elements = 1,
+		.info = &tsl2X7X_device_info[PRX],
 	},
 	[ALSPRX] = {
-		.channel = {
+		.channel_with_events = {
 			{
 			.type = IIO_LIGHT,
 			.indexed = 1,
@@ -1517,11 +1546,37 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.num_event_specs = ARRAY_SIZE(tsl2x7x_events),
 			},
 		},
-	.chan_table_elements = 4,
-	.info = &tsl2X7X_device_info[ALSPRX],
+		.channel_without_events = {
+			{
+			.type = IIO_LIGHT,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_INT_TIME) |
+				BIT(IIO_CHAN_INFO_CALIBSCALE) |
+				BIT(IIO_CHAN_INFO_CALIBBIAS),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 1,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+			}, {
+			.type = IIO_PROXIMITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+			},
+		},
+		.chan_table_elements = 4,
+		.info = &tsl2X7X_device_info[ALSPRX],
 	},
 	[PRX2] = {
-		.channel = {
+		.channel_with_events = {
 			{
 			.type = IIO_PROXIMITY,
 			.indexed = 1,
@@ -1532,11 +1587,20 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.num_event_specs = ARRAY_SIZE(tsl2x7x_events),
 			},
 		},
-	.chan_table_elements = 1,
-	.info = &tsl2X7X_device_info[PRX2],
+		.channel_without_events = {
+			{
+			.type = IIO_PROXIMITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_CALIBSCALE),
+			},
+		},
+		.chan_table_elements = 1,
+		.info = &tsl2X7X_device_info[PRX2],
 	},
 	[ALSPRX2] = {
-		.channel = {
+		.channel_with_events = {
 			{
 			.type = IIO_LIGHT,
 			.indexed = 1,
@@ -1567,8 +1631,35 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.num_event_specs = ARRAY_SIZE(tsl2x7x_events),
 			},
 		},
-	.chan_table_elements = 4,
-	.info = &tsl2X7X_device_info[ALSPRX2],
+		.channel_without_events = {
+			{
+			.type = IIO_LIGHT,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_INT_TIME) |
+				BIT(IIO_CHAN_INFO_CALIBSCALE) |
+				BIT(IIO_CHAN_INFO_CALIBBIAS),
+			}, {
+			.type = IIO_INTENSITY,
+			.indexed = 1,
+			.channel = 1,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+			}, {
+			.type = IIO_PROXIMITY,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				BIT(IIO_CHAN_INFO_CALIBSCALE),
+			},
+		},
+		.chan_table_elements = 4,
+		.info = &tsl2X7X_device_info[ALSPRX2],
 	},
 };
 
@@ -1620,10 +1711,11 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
 	indio_dev->dev.parent = &clientp->dev;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->name = chip->client->name;
-	indio_dev->channels = chip->chip_info->channel;
 	indio_dev->num_channels = chip->chip_info->chan_table_elements;
 
 	if (clientp->irq) {
+		indio_dev->channels = chip->chip_info->channel_with_events;
+
 		ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
 						NULL,
 						&tsl2x7x_event_handler,
@@ -1636,6 +1728,8 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
 				"%s: irq request failed\n", __func__);
 			return ret;
 		}
+	} else {
+		indio_dev->channels = chip->chip_info->channel_without_events;
 	}
 
 	tsl2x7x_defaults(chip);