Merge tag 'staging-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / IIO driver updates from Greg KH:
 "Here is the big staging and iio driver update for 5.2-rc1.

  Lots of tiny fixes all over the staging and IIO driver trees here,
  along with some new IIO drivers.

  The "counter" subsystem was added in here as well, as it is needed by
  the IIO drivers and subsystem.

  Also we ended up deleting two drivers, making this pull request remove
  a few hundred thousand lines of code, always a nice thing to see. Both
  of the drivers removed have been replaced with "real" drivers in their
  various subsystem directories, and they will be coming to you from
  those locations during this merge window.

  There are some core vt/selection changes in here, that was due to some
  cleanups needed for the speakup fixes. Those have all been acked by
  the various subsystem maintainers (i.e. me), so those are ok.

  We also added a few new drivers, for some odd hardware, giving new
  developers plenty to work on with basic coding style cleanups to come
  in the near future.

  Other than that, nothing unusual here.

  All of these have been in linux-next for a while with no reported
  issues, other than an odd gcc warning for one of the new drivers that
  should be fixed up soon"

[ I fixed up the warning myself  - Linus ]

* tag 'staging-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (663 commits)
  staging: kpc2000: kpc_spi: Fix build error for {read,write}q
  Staging: rtl8192e: Remove extra space before break statement
  Staging: rtl8192u: ieee80211: Fix if-else indentation warning
  Staging: rtl8192u: ieee80211: Fix indentation errors by removing extra spaces
  staging: most: cdev: fix chrdev_region leak in mod_exit
  staging: wlan-ng: Fix improper SPDX comment style
  staging: rtl8192u: ieee80211: Resolve ERROR reported by checkpatch
  staging: vc04_services: bcm2835-camera: Compress two lines into one line
  staging: rtl8723bs: core: Use !x in place of NULL comparison.
  staging: rtl8723bs: core: Prefer using the BIT Macro.
  staging: fieldbus: anybus-s: fix wait_for_completion_timeout return handling
  staging: kpc2000: fix up build problems with readq()
  staging: rtlwifi: move remaining phydm .h files
  staging: rtlwifi: strip down phydm .h files
  staging: rtlwifi: delete the staging driver
  staging: fieldbus: anybus-s: rename bus id field to avoid confusion
  staging: fieldbus: anybus-s: keep device bus id in bus endianness
  Staging: sm750fb: Change *array into *const array
  staging: rtl8192u: ieee80211: Fix spelling mistake
  staging: rtl8192u: ieee80211: Replace bit shifting with BIT macro
  ...

1 files changed, 99 insertions, 21 deletions

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index ebb8de03bbce..24c70c3cefb4 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -31,7 +31,7 @@
  * Scales are computed as 5000/32768 and 10000/32768 respectively,
  * so that when applied to the raw values they provide mV values
  */
-static const unsigned int scale_avail[2] = {
+static const unsigned int ad7606_scale_avail[2] = {
 	152588, 305176
 };
 
@@ -39,6 +39,10 @@ static const unsigned int ad7606_oversampling_avail[7] = {
 	1, 2, 4, 8, 16, 32, 64,
 };
 
+static const unsigned int ad7616_oversampling_avail[8] = {
+	1, 2, 4, 8, 16, 32, 64, 128,
+};
+
 static int ad7606_reset(struct ad7606_state *st)
 {
 	if (st->gpio_reset) {
@@ -154,7 +158,7 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
-		*val2 = scale_avail[st->range];
+		*val2 = st->scale_avail[st->range];
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
 		*val = st->oversampling;
@@ -163,21 +167,31 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-static ssize_t in_voltage_scale_available_show(struct device *dev,
-					       struct device_attribute *attr,
-					       char *buf)
+static ssize_t ad7606_show_avail(char *buf, const unsigned int *vals,
+				 unsigned int n, bool micros)
 {
-	int i, len = 0;
-
-	for (i = 0; i < ARRAY_SIZE(scale_avail); i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
-				 scale_avail[i]);
+	size_t len = 0;
+	int i;
 
+	for (i = 0; i < n; i++) {
+		len += scnprintf(buf + len, PAGE_SIZE - len,
+			micros ? "0.%06u " : "%u ", vals[i]);
+	}
 	buf[len - 1] = '\n';
 
 	return len;
 }
 
+static ssize_t in_voltage_scale_available_show(struct device *dev,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct ad7606_state *st = iio_priv(indio_dev);
+
+	return ad7606_show_avail(buf, st->scale_avail, st->num_scales, true);
+}
+
 static IIO_DEVICE_ATTR_RO(in_voltage_scale_available, 0);
 
 static int ad7606_write_raw(struct iio_dev *indio_dev,
@@ -193,7 +207,7 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 	switch (mask) {
 	case IIO_CHAN_INFO_SCALE:
 		mutex_lock(&st->lock);
-		i = find_closest(val2, scale_avail, ARRAY_SIZE(scale_avail));
+		i = find_closest(val2, st->scale_avail, st->num_scales);
 		gpiod_set_value(st->gpio_range, i);
 		st->range = i;
 		mutex_unlock(&st->lock);
@@ -202,15 +216,20 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
 		if (val2)
 			return -EINVAL;
-		i = find_closest(val, ad7606_oversampling_avail,
-				 ARRAY_SIZE(ad7606_oversampling_avail));
+		i = find_closest(val, st->oversampling_avail,
+				 st->num_os_ratios);
 
 		values[0] = i;
 
 		mutex_lock(&st->lock);
 		gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,
 				      st->gpio_os->info, values);
-		st->oversampling = ad7606_oversampling_avail[i];
+
+		/* AD7616 requires a reset to update value */
+		if (st->chip_info->os_req_reset)
+			ad7606_reset(st);
+
+		st->oversampling = st->oversampling_avail[i];
 		mutex_unlock(&st->lock);
 
 		return 0;
@@ -219,11 +238,23 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 	}
 }
 
-static IIO_CONST_ATTR(oversampling_ratio_available, "1 2 4 8 16 32 64");
+static ssize_t ad7606_oversampling_ratio_avail(struct device *dev,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct ad7606_state *st = iio_priv(indio_dev);
+
+	return ad7606_show_avail(buf, st->oversampling_avail,
+				 st->num_os_ratios, false);
+}
+
+static IIO_DEVICE_ATTR(oversampling_ratio_available, 0444,
+		       ad7606_oversampling_ratio_avail, NULL, 0);
 
 static struct attribute *ad7606_attributes_os_and_range[] = {
 	&iio_dev_attr_in_voltage_scale_available.dev_attr.attr,
-	&iio_const_attr_oversampling_ratio_available.dev_attr.attr,
+	&iio_dev_attr_oversampling_ratio_available.dev_attr.attr,
 	NULL,
 };
 
@@ -232,7 +263,7 @@ static const struct attribute_group ad7606_attribute_group_os_and_range = {
 };
 
 static struct attribute *ad7606_attributes_os[] = {
-	&iio_const_attr_oversampling_ratio_available.dev_attr.attr,
+	&iio_dev_attr_oversampling_ratio_available.dev_attr.attr,
 	NULL,
 };
 
@@ -292,6 +323,36 @@ static const struct iio_chan_spec ad7606_channels[] = {
 	AD7606_CHANNEL(7),
 };
 
+/*
+ * The current assumption that this driver makes for AD7616, is that it's
+ * working in Hardware Mode with Serial, Burst and Sequencer modes activated.
+ * To activate them, following pins must be pulled high:
+ *	-SER/PAR
+ *	-SEQEN
+ * And following pins must be pulled low:
+ *	-WR/BURST
+ *	-DB4/SER1W
+ */
+static const struct iio_chan_spec ad7616_channels[] = {
+	IIO_CHAN_SOFT_TIMESTAMP(16),
+	AD7606_CHANNEL(0),
+	AD7606_CHANNEL(1),
+	AD7606_CHANNEL(2),
+	AD7606_CHANNEL(3),
+	AD7606_CHANNEL(4),
+	AD7606_CHANNEL(5),
+	AD7606_CHANNEL(6),
+	AD7606_CHANNEL(7),
+	AD7606_CHANNEL(8),
+	AD7606_CHANNEL(9),
+	AD7606_CHANNEL(10),
+	AD7606_CHANNEL(11),
+	AD7606_CHANNEL(12),
+	AD7606_CHANNEL(13),
+	AD7606_CHANNEL(14),
+	AD7606_CHANNEL(15),
+};
+
 static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
 	/* More devices added in future */
 	[ID_AD7605_4] = {
@@ -301,17 +362,27 @@ static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
 	[ID_AD7606_8] = {
 		.channels = ad7606_channels,
 		.num_channels = 9,
-		.has_oversampling = true,
+		.oversampling_avail = ad7606_oversampling_avail,
+		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
 	[ID_AD7606_6] = {
 		.channels = ad7606_channels,
 		.num_channels = 7,
-		.has_oversampling = true,
+		.oversampling_avail = ad7606_oversampling_avail,
+		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
 	[ID_AD7606_4] = {
 		.channels = ad7606_channels,
 		.num_channels = 5,
-		.has_oversampling = true,
+		.oversampling_avail = ad7606_oversampling_avail,
+		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
+	},
+	[ID_AD7616] = {
+		.channels = ad7616_channels,
+		.num_channels = 17,
+		.oversampling_avail = ad7616_oversampling_avail,
+		.oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail),
+		.os_req_reset = true,
 	},
 };
 
@@ -343,7 +414,7 @@ static int ad7606_request_gpios(struct ad7606_state *st)
 	if (IS_ERR(st->gpio_frstdata))
 		return PTR_ERR(st->gpio_frstdata);
 
-	if (!st->chip_info->has_oversampling)
+	if (!st->chip_info->oversampling_num)
 		return 0;
 
 	st->gpio_os = devm_gpiod_get_array_optional(dev,
@@ -467,6 +538,8 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 	/* tied to logic low, analog input range is +/- 5V */
 	st->range = 0;
 	st->oversampling = 1;
+	st->scale_avail = ad7606_scale_avail;
+	st->num_scales = ARRAY_SIZE(ad7606_scale_avail);
 
 	st->reg = devm_regulator_get(dev, "avcc");
 	if (IS_ERR(st->reg))
@@ -484,6 +557,11 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 
 	st->chip_info = &ad7606_chip_info_tbl[id];
 
+	if (st->chip_info->oversampling_num) {
+		st->oversampling_avail = st->chip_info->oversampling_avail;
+		st->num_os_ratios = st->chip_info->oversampling_num;
+	}
+
 	ret = ad7606_request_gpios(st);
 	if (ret)
 		return ret;