* [Patch v6 1/6] devres: introduce API "devm_kmemdup
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 2/6] IIO: core: Introduce read_raw_multi Srinivas Pandruvada
` (4 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
Introduce devm_kmemdup, which uses resource managed kmalloc.
There are several request from maintainers to add this instead
of using kmemdup.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
Documentation/driver-model/devres.txt | 1 +
drivers/base/devres.c | 21 +++++++++++++++++++++
include/linux/device.h | 2 ++
3 files changed, 24 insertions(+)
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 4f7897e..4999518 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -236,6 +236,7 @@ certainly invest a bit more effort into libata core layer).
MEM
devm_kzalloc()
devm_kfree()
+ devm_kmemdup()
IIO
devm_iio_device_alloc()
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db4e264..d0914cb 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -831,3 +831,24 @@ void devm_kfree(struct device *dev, void *p)
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_kfree);
+
+/**
+ * devm_kmemdup - Resource-managed kmemdup
+ * @dev: Device this memory belongs to
+ * @src: Memory region to duplicate
+ * @len: Memory region length
+ * @gfp: GFP mask to use
+ *
+ * Duplicate region of a memory using resource managed kmalloc
+ */
+void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
+{
+ void *p;
+
+ p = devm_kmalloc(dev, len, gfp);
+ if (p)
+ memcpy(p, src, len);
+
+ return p;
+}
+EXPORT_SYMBOL_GPL(devm_kmemdup);
diff --git a/include/linux/device.h b/include/linux/device.h
index 233bbbe..4a37849 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -629,6 +629,8 @@ static inline void *devm_kcalloc(struct device *dev,
}
extern void devm_kfree(struct device *dev, void *p);
extern char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp);
+extern void *devm_kmemdup(struct device *dev, const void *src, size_t len,
+ gfp_t gfp);
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
void __iomem *devm_request_and_ioremap(struct device *dev,
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread* [Patch v6 2/6] IIO: core: Introduce read_raw_multi
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 1/6] devres: introduce API "devm_kmemdup Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 3/6] IIO: core: Modify scan element type Srinivas Pandruvada
` (3 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
This callback is introduced to overcome some limitations of existing
read_raw callback. The functionality of both existing read_raw and
read_raw_multi is similar, both are used to request values from the
device. The current read_raw callback allows only two return values.
The new read_raw_multi allows returning multiple values. Instead of
passing just address of val and val2, it passes length and pointer
to values. Depending on the type and length of passed buffer, iio
client drivers can return multiple values.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/iio/iio_core.h | 2 +-
drivers/iio/industrialio-core.c | 65 ++++++++++++++++++++++++++--------------
drivers/iio/industrialio-event.c | 6 ++--
drivers/iio/inkern.c | 16 ++++++++--
include/linux/iio/iio.h | 17 +++++++++++
include/linux/iio/types.h | 1 +
6 files changed, 80 insertions(+), 27 deletions(-)
diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h
index f6db6af..5f0ea77 100644
--- a/drivers/iio/iio_core.h
+++ b/drivers/iio/iio_core.h
@@ -35,7 +35,7 @@ int __iio_add_chan_devattr(const char *postfix,
struct list_head *attr_list);
void iio_free_chan_devattr_list(struct list_head *attr_list);
-ssize_t iio_format_value(char *buf, unsigned int type, int val, int val2);
+ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
/* Event interface flags */
#define IIO_BUSY_BIT_POS 1
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index ede16aec..e22a984 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -373,41 +373,53 @@ EXPORT_SYMBOL_GPL(iio_enum_write);
* @buf: The buffer to which the formated value gets written
* @type: One of the IIO_VAL_... constants. This decides how the val and val2
* parameters are formatted.
- * @val: First part of the value, exact meaning depends on the type parameter.
- * @val2: Second part of the value, exact meaning depends on the type parameter.
+ * @vals: pointer to the values, exact meaning depends on the type parameter.
*/
-ssize_t iio_format_value(char *buf, unsigned int type, int val, int val2)
+ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals)
{
unsigned long long tmp;
bool scale_db = false;
switch (type) {
case IIO_VAL_INT:
- return sprintf(buf, "%d\n", val);
+ return sprintf(buf, "%d\n", vals[0]);
case IIO_VAL_INT_PLUS_MICRO_DB:
scale_db = true;
case IIO_VAL_INT_PLUS_MICRO:
- if (val2 < 0)
- return sprintf(buf, "-%ld.%06u%s\n", abs(val), -val2,
+ if (vals[1] < 0)
+ return sprintf(buf, "-%ld.%06u%s\n", abs(vals[0]),
+ -vals[1],
scale_db ? " dB" : "");
else
- return sprintf(buf, "%d.%06u%s\n", val, val2,
+ return sprintf(buf, "%d.%06u%s\n", vals[0], vals[1],
scale_db ? " dB" : "");
case IIO_VAL_INT_PLUS_NANO:
- if (val2 < 0)
- return sprintf(buf, "-%ld.%09u\n", abs(val), -val2);
+ if (vals[1] < 0)
+ return sprintf(buf, "-%ld.%09u\n", abs(vals[0]),
+ -vals[1]);
else
- return sprintf(buf, "%d.%09u\n", val, val2);
+ return sprintf(buf, "%d.%09u\n", vals[0], vals[1]);
case IIO_VAL_FRACTIONAL:
- tmp = div_s64((s64)val * 1000000000LL, val2);
- val2 = do_div(tmp, 1000000000LL);
- val = tmp;
- return sprintf(buf, "%d.%09u\n", val, val2);
+ tmp = div_s64((s64)vals[0] * 1000000000LL, vals[1]);
+ vals[1] = do_div(tmp, 1000000000LL);
+ vals[0] = tmp;
+ return sprintf(buf, "%d.%09u\n", vals[0], vals[1]);
case IIO_VAL_FRACTIONAL_LOG2:
- tmp = (s64)val * 1000000000LL >> val2;
- val2 = do_div(tmp, 1000000000LL);
- val = tmp;
- return sprintf(buf, "%d.%09u\n", val, val2);
+ tmp = (s64)vals[0] * 1000000000LL >> vals[1];
+ vals[1] = do_div(tmp, 1000000000LL);
+ vals[0] = tmp;
+ return sprintf(buf, "%d.%09u\n", vals[0], vals[1]);
+ case IIO_VAL_INT_MULTIPLE:
+ {
+ int i;
+ int len = 0;
+
+ for (i = 0; i < size; ++i)
+ len += snprintf(&buf[len], PAGE_SIZE - len, "%d ",
+ vals[i]);
+ len += snprintf(&buf[len], PAGE_SIZE - len, "\n");
+ return len;
+ }
default:
return 0;
}
@@ -419,14 +431,23 @@ static ssize_t iio_read_channel_info(struct device *dev,
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- int val, val2;
- int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
- &val, &val2, this_attr->address);
+ int vals[INDIO_MAX_RAW_ELEMENTS];
+ int ret;
+ int val_len = 2;
+
+ if (indio_dev->info->read_raw_multi)
+ ret = indio_dev->info->read_raw_multi(indio_dev, this_attr->c,
+ INDIO_MAX_RAW_ELEMENTS,
+ vals, &val_len,
+ this_attr->address);
+ else
+ ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
+ &vals[0], &vals[1], this_attr->address);
if (ret < 0)
return ret;
- return iio_format_value(buf, ret, val, val2);
+ return iio_format_value(buf, ret, val_len, vals);
}
/**
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index ea6e06b..1b4f31b 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -270,7 +270,7 @@ static ssize_t iio_ev_value_show(struct device *dev,
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- int val, val2;
+ int val, val2, val_arr[2];
int ret;
ret = indio_dev->info->read_event_value(indio_dev,
@@ -279,7 +279,9 @@ static ssize_t iio_ev_value_show(struct device *dev,
&val, &val2);
if (ret < 0)
return ret;
- return iio_format_value(buf, ret, val, val2);
+ val_arr[0] = val;
+ val_arr[1] = val2;
+ return iio_format_value(buf, ret, 2, val_arr);
}
static ssize_t iio_ev_value_store(struct device *dev,
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 0cf5f8e..75e5386 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -417,12 +417,24 @@ static int iio_channel_read(struct iio_channel *chan, int *val, int *val2,
enum iio_chan_info_enum info)
{
int unused;
+ int vals[INDIO_MAX_RAW_ELEMENTS];
+ int ret;
+ int val_len = 2;
if (val2 == NULL)
val2 = &unused;
- return chan->indio_dev->info->read_raw(chan->indio_dev, chan->channel,
- val, val2, info);
+ if (chan->indio_dev->info->read_raw_multi) {
+ ret = chan->indio_dev->info->read_raw_multi(chan->indio_dev,
+ chan->channel, INDIO_MAX_RAW_ELEMENTS,
+ vals, &val_len, info);
+ *val = vals[0];
+ *val2 = vals[1];
+ } else
+ ret = chan->indio_dev->info->read_raw(chan->indio_dev,
+ chan->channel, val, val2, info);
+
+ return ret;
}
int iio_read_channel_raw(struct iio_channel *chan, int *val)
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 5f2d00e..5629c92 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -288,6 +288,8 @@ static inline s64 iio_get_time_ns(void)
#define INDIO_ALL_BUFFER_MODES \
(INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE)
+#define INDIO_MAX_RAW_ELEMENTS 4
+
struct iio_trigger; /* forward declaration */
struct iio_dev;
@@ -302,6 +304,14 @@ struct iio_dev;
* the channel in question. Return value will specify the
* type of value returned by the device. val and val2 will
* contain the elements making up the returned value.
+ * @read_raw_multi: function to return values from the device.
+ * mask specifies which value. Note 0 means a reading of
+ * the channel in question. Return value will specify the
+ * type of value returned by the device. vals pointer
+ * contain the elements making up the returned value.
+ * max_len specifies maximum number of elements
+ * vals pointer can contain. val_len is used to return
+ * length of valid elements in vals.
* @write_raw: function to write a value to the device.
* Parameters are the same as for read_raw.
* @write_raw_get_fmt: callback function to query the expected
@@ -328,6 +338,13 @@ struct iio_info {
int *val2,
long mask);
+ int (*read_raw_multi)(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int max_len,
+ int *vals,
+ int *val_len,
+ long mask);
+
int (*write_raw)(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 084d882..a13c224 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -79,6 +79,7 @@ enum iio_event_direction {
#define IIO_VAL_INT_PLUS_MICRO 2
#define IIO_VAL_INT_PLUS_NANO 3
#define IIO_VAL_INT_PLUS_MICRO_DB 4
+#define IIO_VAL_INT_MULTIPLE 5
#define IIO_VAL_FRACTIONAL 10
#define IIO_VAL_FRACTIONAL_LOG2 11
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread* [Patch v6 3/6] IIO: core: Modify scan element type
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 1/6] devres: introduce API "devm_kmemdup Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 2/6] IIO: core: Introduce read_raw_multi Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
2014-04-25 18:02 ` Jonathan Cameron
2014-04-15 18:21 ` [Patch v6 4/6] IIO: core: Add quaternion modifier Srinivas Pandruvada
` (2 subsequent siblings)
5 siblings, 1 reply; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
The current scan element type uses the following format:
[be|le]:[s|u]bits/storagebits[>>shift].
To specify multiple elements in this type, added a repeat value.
So new format is:
[be|le]:[s|u]bits/storagebits{X[repeat]}[>>shift].
Here X is specifying how may times, real/storage bits are repeating.
When X is value is 0 or 1, then repeat value is not used in the format,
and it will be same as existing format.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/iio/industrialio-buffer.c | 41 +++++++++++++++++++++++++++++++++------
include/linux/iio/iio.h | 7 +++++++
2 files changed, 42 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index e108f2a..aa90c68 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -150,7 +150,16 @@ static ssize_t iio_show_fixed_type(struct device *dev,
type = IIO_BE;
#endif
}
- return sprintf(buf, "%s:%c%d/%d>>%u\n",
+ if (this_attr->c->scan_type.repeat > 1)
+ return sprintf(buf, "%s:%c%d/%d{%d[repeat]}>>%u\n",
+ iio_endian_prefix[type],
+ this_attr->c->scan_type.sign,
+ this_attr->c->scan_type.realbits,
+ this_attr->c->scan_type.storagebits,
+ this_attr->c->scan_type.repeat,
+ this_attr->c->scan_type.shift);
+ else
+ return sprintf(buf, "%s:%c%d/%d>>%u\n",
iio_endian_prefix[type],
this_attr->c->scan_type.sign,
this_attr->c->scan_type.realbits,
@@ -474,14 +483,22 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev,
for_each_set_bit(i, mask,
indio_dev->masklength) {
ch = iio_find_channel_from_si(indio_dev, i);
- length = ch->scan_type.storagebits / 8;
+ if (ch->scan_type.repeat > 1)
+ length = ch->scan_type.storagebits / 8 *
+ ch->scan_type.repeat;
+ else
+ length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
if (timestamp) {
ch = iio_find_channel_from_si(indio_dev,
indio_dev->scan_index_timestamp);
- length = ch->scan_type.storagebits / 8;
+ if (ch->scan_type.repeat > 1)
+ length = ch->scan_type.storagebits / 8 *
+ ch->scan_type.repeat;
+ else
+ length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
@@ -957,7 +974,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
indio_dev->masklength,
in_ind + 1);
ch = iio_find_channel_from_si(indio_dev, in_ind);
- length = ch->scan_type.storagebits/8;
+ if (ch->scan_type.repeat > 1)
+ length = ch->scan_type.storagebits / 8 *
+ ch->scan_type.repeat;
+ else
+ length = ch->scan_type.storagebits / 8;
/* Make sure we are aligned */
in_loc += length;
if (in_loc % length)
@@ -969,7 +990,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
goto error_clear_mux_table;
}
ch = iio_find_channel_from_si(indio_dev, in_ind);
- length = ch->scan_type.storagebits/8;
+ if (ch->scan_type.repeat > 1)
+ length = ch->scan_type.storagebits / 8 *
+ ch->scan_type.repeat;
+ else
+ length = ch->scan_type.storagebits / 8;
if (out_loc % length)
out_loc += length - out_loc % length;
if (in_loc % length)
@@ -990,7 +1015,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
}
ch = iio_find_channel_from_si(indio_dev,
indio_dev->scan_index_timestamp);
- length = ch->scan_type.storagebits/8;
+ if (ch->scan_type.repeat > 1)
+ length = ch->scan_type.storagebits / 8 *
+ ch->scan_type.repeat;
+ else
+ length = ch->scan_type.storagebits / 8;
if (out_loc % length)
out_loc += length - out_loc % length;
if (in_loc % length)
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 5629c92..ccde917 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -177,6 +177,12 @@ struct iio_event_spec {
* shift: Shift right by this before masking out
* realbits.
* endianness: little or big endian
+ * repeat: Number of times real/storage bits
+ * repeats. When the repeat element is
+ * more than 1, then the type element in
+ * sysfs will show a repeat value.
+ * Otherwise, the number of repetitions is
+ * omitted.
* @info_mask_separate: What information is to be exported that is specific to
* this channel.
* @info_mask_shared_by_type: What information is to be exported that is shared
@@ -219,6 +225,7 @@ struct iio_chan_spec {
u8 realbits;
u8 storagebits;
u8 shift;
+ u8 repeat;
enum iio_endian endianness;
} scan_type;
long info_mask_separate;
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [Patch v6 3/6] IIO: core: Modify scan element type
2014-04-15 18:21 ` [Patch v6 3/6] IIO: core: Modify scan element type Srinivas Pandruvada
@ 2014-04-25 18:02 ` Jonathan Cameron
2014-04-26 19:36 ` Srinivas Pandruvada
0 siblings, 1 reply; 9+ messages in thread
From: Jonathan Cameron @ 2014-04-25 18:02 UTC (permalink / raw)
To: Srinivas Pandruvada
Cc: linux-iio, linux-kernel, Lars-Peter Clausen, Peter Meerwald
On 15/04/14 19:21, Srinivas Pandruvada wrote:
> The current scan element type uses the following format:
> [be|le]:[s|u]bits/storagebits[>>shift].
> To specify multiple elements in this type, added a repeat value.
> So new format is:
> [be|le]:[s|u]bits/storagebits{X[repeat]}[>>shift].
> Here X is specifying how may times, real/storage bits are repeating.
>
> When X is value is 0 or 1, then repeat value is not used in the format,
> and it will be same as existing format.
>
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Hi Srinivas,
I'm afraid I've been rather useless in my reviewing of earlier versions of this.
What I originally meant to suggest was that we'd have descriptions along the lines
of
u12/16{X4}>>2 (or u12/16X4>>2 without the brackets) rather than u12/16{4repeat}>>2
Now obviously you've gone a long way with this approach so I guess perhaps people
actually like the word repeat in there?
Sorry again that I didn't pick up on this in any of the last 4 versions you have posted.
Sometimes the eye sees what it expects to rather than what is there!
I don't particularly mind the version using the word 'repeat' if others like, it simply
isn't what I thought we had here!
(the rest of this series are fine now btw)
J
> ---
> drivers/iio/industrialio-buffer.c | 41 +++++++++++++++++++++++++++++++++------
> include/linux/iio/iio.h | 7 +++++++
> 2 files changed, 42 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
> index e108f2a..aa90c68 100644
> --- a/drivers/iio/industrialio-buffer.c
> +++ b/drivers/iio/industrialio-buffer.c
> @@ -150,7 +150,16 @@ static ssize_t iio_show_fixed_type(struct device *dev,
> type = IIO_BE;
> #endif
> }
> - return sprintf(buf, "%s:%c%d/%d>>%u\n",
> + if (this_attr->c->scan_type.repeat > 1)
> + return sprintf(buf, "%s:%c%d/%d{%d[repeat]}>>%u\n",
> + iio_endian_prefix[type],
> + this_attr->c->scan_type.sign,
> + this_attr->c->scan_type.realbits,
> + this_attr->c->scan_type.storagebits,
> + this_attr->c->scan_type.repeat,
> + this_attr->c->scan_type.shift);
> + else
> + return sprintf(buf, "%s:%c%d/%d>>%u\n",
> iio_endian_prefix[type],
> this_attr->c->scan_type.sign,
> this_attr->c->scan_type.realbits,
> @@ -474,14 +483,22 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev,
> for_each_set_bit(i, mask,
> indio_dev->masklength) {
> ch = iio_find_channel_from_si(indio_dev, i);
> - length = ch->scan_type.storagebits / 8;
> + if (ch->scan_type.repeat > 1)
> + length = ch->scan_type.storagebits / 8 *
> + ch->scan_type.repeat;
> + else
> + length = ch->scan_type.storagebits / 8;
> bytes = ALIGN(bytes, length);
> bytes += length;
> }
> if (timestamp) {
> ch = iio_find_channel_from_si(indio_dev,
> indio_dev->scan_index_timestamp);
> - length = ch->scan_type.storagebits / 8;
> + if (ch->scan_type.repeat > 1)
> + length = ch->scan_type.storagebits / 8 *
> + ch->scan_type.repeat;
> + else
> + length = ch->scan_type.storagebits / 8;
> bytes = ALIGN(bytes, length);
> bytes += length;
> }
> @@ -957,7 +974,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
> indio_dev->masklength,
> in_ind + 1);
> ch = iio_find_channel_from_si(indio_dev, in_ind);
> - length = ch->scan_type.storagebits/8;
> + if (ch->scan_type.repeat > 1)
> + length = ch->scan_type.storagebits / 8 *
> + ch->scan_type.repeat;
> + else
> + length = ch->scan_type.storagebits / 8;
> /* Make sure we are aligned */
> in_loc += length;
> if (in_loc % length)
> @@ -969,7 +990,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
> goto error_clear_mux_table;
> }
> ch = iio_find_channel_from_si(indio_dev, in_ind);
> - length = ch->scan_type.storagebits/8;
> + if (ch->scan_type.repeat > 1)
> + length = ch->scan_type.storagebits / 8 *
> + ch->scan_type.repeat;
> + else
> + length = ch->scan_type.storagebits / 8;
> if (out_loc % length)
> out_loc += length - out_loc % length;
> if (in_loc % length)
> @@ -990,7 +1015,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
> }
> ch = iio_find_channel_from_si(indio_dev,
> indio_dev->scan_index_timestamp);
> - length = ch->scan_type.storagebits/8;
> + if (ch->scan_type.repeat > 1)
> + length = ch->scan_type.storagebits / 8 *
> + ch->scan_type.repeat;
> + else
> + length = ch->scan_type.storagebits / 8;
> if (out_loc % length)
> out_loc += length - out_loc % length;
> if (in_loc % length)
> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
> index 5629c92..ccde917 100644
> --- a/include/linux/iio/iio.h
> +++ b/include/linux/iio/iio.h
> @@ -177,6 +177,12 @@ struct iio_event_spec {
> * shift: Shift right by this before masking out
> * realbits.
> * endianness: little or big endian
> + * repeat: Number of times real/storage bits
> + * repeats. When the repeat element is
> + * more than 1, then the type element in
> + * sysfs will show a repeat value.
> + * Otherwise, the number of repetitions is
> + * omitted.
> * @info_mask_separate: What information is to be exported that is specific to
> * this channel.
> * @info_mask_shared_by_type: What information is to be exported that is shared
> @@ -219,6 +225,7 @@ struct iio_chan_spec {
> u8 realbits;
> u8 storagebits;
> u8 shift;
> + u8 repeat;
> enum iio_endian endianness;
> } scan_type;
> long info_mask_separate;
>
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [Patch v6 3/6] IIO: core: Modify scan element type
2014-04-25 18:02 ` Jonathan Cameron
@ 2014-04-26 19:36 ` Srinivas Pandruvada
0 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-26 19:36 UTC (permalink / raw)
To: Jonathan Cameron
Cc: linux-iio, linux-kernel, Lars-Peter Clausen, Peter Meerwald
On 04/25/2014 11:02 AM, Jonathan Cameron wrote:
> On 15/04/14 19:21, Srinivas Pandruvada wrote:
>> The current scan element type uses the following format:
>> [be|le]:[s|u]bits/storagebits[>>shift].
>> To specify multiple elements in this type, added a repeat value.
>> So new format is:
>> [be|le]:[s|u]bits/storagebits{X[repeat]}[>>shift].
>> Here X is specifying how may times, real/storage bits are repeating.
>>
>> When X is value is 0 or 1, then repeat value is not used in the format,
>> and it will be same as existing format.
>>
>> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> Hi Srinivas,
>
> I'm afraid I've been rather useless in my reviewing of earlier
> versions of this.
> What I originally meant to suggest was that we'd have descriptions
> along the lines
> of
> u12/16{X4}>>2 (or u12/16X4>>2 without the brackets) rather than
> u12/16{4repeat}>>2
I don't mind using u12/16X4>>2, will submit series again.
Thanks,
Srinivas
>
> Now obviously you've gone a long way with this approach so I guess
> perhaps people
> actually like the word repeat in there?
>
> Sorry again that I didn't pick up on this in any of the last 4
> versions you have posted.
> Sometimes the eye sees what it expects to rather than what is there!
>
> I don't particularly mind the version using the word 'repeat' if
> others like, it simply
> isn't what I thought we had here!
>
> (the rest of this series are fine now btw)
>
> J
>> ---
>> drivers/iio/industrialio-buffer.c | 41
>> +++++++++++++++++++++++++++++++++------
>> include/linux/iio/iio.h | 7 +++++++
>> 2 files changed, 42 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/iio/industrialio-buffer.c
>> b/drivers/iio/industrialio-buffer.c
>> index e108f2a..aa90c68 100644
>> --- a/drivers/iio/industrialio-buffer.c
>> +++ b/drivers/iio/industrialio-buffer.c
>> @@ -150,7 +150,16 @@ static ssize_t iio_show_fixed_type(struct device
>> *dev,
>> type = IIO_BE;
>> #endif
>> }
>> - return sprintf(buf, "%s:%c%d/%d>>%u\n",
>> + if (this_attr->c->scan_type.repeat > 1)
>> + return sprintf(buf, "%s:%c%d/%d{%d[repeat]}>>%u\n",
>> + iio_endian_prefix[type],
>> + this_attr->c->scan_type.sign,
>> + this_attr->c->scan_type.realbits,
>> + this_attr->c->scan_type.storagebits,
>> + this_attr->c->scan_type.repeat,
>> + this_attr->c->scan_type.shift);
>> + else
>> + return sprintf(buf, "%s:%c%d/%d>>%u\n",
>> iio_endian_prefix[type],
>> this_attr->c->scan_type.sign,
>> this_attr->c->scan_type.realbits,
>> @@ -474,14 +483,22 @@ static int iio_compute_scan_bytes(struct
>> iio_dev *indio_dev,
>> for_each_set_bit(i, mask,
>> indio_dev->masklength) {
>> ch = iio_find_channel_from_si(indio_dev, i);
>> - length = ch->scan_type.storagebits / 8;
>> + if (ch->scan_type.repeat > 1)
>> + length = ch->scan_type.storagebits / 8 *
>> + ch->scan_type.repeat;
>> + else
>> + length = ch->scan_type.storagebits / 8;
>> bytes = ALIGN(bytes, length);
>> bytes += length;
>> }
>> if (timestamp) {
>> ch = iio_find_channel_from_si(indio_dev,
>> indio_dev->scan_index_timestamp);
>> - length = ch->scan_type.storagebits / 8;
>> + if (ch->scan_type.repeat > 1)
>> + length = ch->scan_type.storagebits / 8 *
>> + ch->scan_type.repeat;
>> + else
>> + length = ch->scan_type.storagebits / 8;
>> bytes = ALIGN(bytes, length);
>> bytes += length;
>> }
>> @@ -957,7 +974,11 @@ static int iio_buffer_update_demux(struct
>> iio_dev *indio_dev,
>> indio_dev->masklength,
>> in_ind + 1);
>> ch = iio_find_channel_from_si(indio_dev, in_ind);
>> - length = ch->scan_type.storagebits/8;
>> + if (ch->scan_type.repeat > 1)
>> + length = ch->scan_type.storagebits / 8 *
>> + ch->scan_type.repeat;
>> + else
>> + length = ch->scan_type.storagebits / 8;
>> /* Make sure we are aligned */
>> in_loc += length;
>> if (in_loc % length)
>> @@ -969,7 +990,11 @@ static int iio_buffer_update_demux(struct
>> iio_dev *indio_dev,
>> goto error_clear_mux_table;
>> }
>> ch = iio_find_channel_from_si(indio_dev, in_ind);
>> - length = ch->scan_type.storagebits/8;
>> + if (ch->scan_type.repeat > 1)
>> + length = ch->scan_type.storagebits / 8 *
>> + ch->scan_type.repeat;
>> + else
>> + length = ch->scan_type.storagebits / 8;
>> if (out_loc % length)
>> out_loc += length - out_loc % length;
>> if (in_loc % length)
>> @@ -990,7 +1015,11 @@ static int iio_buffer_update_demux(struct
>> iio_dev *indio_dev,
>> }
>> ch = iio_find_channel_from_si(indio_dev,
>> indio_dev->scan_index_timestamp);
>> - length = ch->scan_type.storagebits/8;
>> + if (ch->scan_type.repeat > 1)
>> + length = ch->scan_type.storagebits / 8 *
>> + ch->scan_type.repeat;
>> + else
>> + length = ch->scan_type.storagebits / 8;
>> if (out_loc % length)
>> out_loc += length - out_loc % length;
>> if (in_loc % length)
>> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
>> index 5629c92..ccde917 100644
>> --- a/include/linux/iio/iio.h
>> +++ b/include/linux/iio/iio.h
>> @@ -177,6 +177,12 @@ struct iio_event_spec {
>> * shift: Shift right by this before masking out
>> * realbits.
>> * endianness: little or big endian
>> + * repeat: Number of times real/storage bits
>> + * repeats. When the repeat element is
>> + * more than 1, then the type element in
>> + * sysfs will show a repeat value.
>> + * Otherwise, the number of repetitions is
>> + * omitted.
>> * @info_mask_separate: What information is to be exported that is
>> specific to
>> * this channel.
>> * @info_mask_shared_by_type: What information is to be exported
>> that is shared
>> @@ -219,6 +225,7 @@ struct iio_chan_spec {
>> u8 realbits;
>> u8 storagebits;
>> u8 shift;
>> + u8 repeat;
>> enum iio_endian endianness;
>> } scan_type;
>> long info_mask_separate;
>>
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Patch v6 4/6] IIO: core: Add quaternion modifier
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
` (2 preceding siblings ...)
2014-04-15 18:21 ` [Patch v6 3/6] IIO: core: Modify scan element type Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 5/6] iio: hid-sensors: Added device rotation support Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 6/6] iio: Added ABI description for quaternion Srinivas Pandruvada
5 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
Added quaternion in the list of supported modifiers.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/iio/industrialio-core.c | 1 +
include/linux/iio/types.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index e22a984..dcc1849 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -84,6 +84,7 @@ static const char * const iio_modifier_names[] = {
[IIO_MOD_LIGHT_RED] = "red",
[IIO_MOD_LIGHT_GREEN] = "green",
[IIO_MOD_LIGHT_BLUE] = "blue",
+ [IIO_MOD_QUATERNION] = "quaternion",
};
/* relies on pairs of these shared then separate */
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index a13c224..4fdab2e 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -53,6 +53,7 @@ enum iio_modifier {
IIO_MOD_LIGHT_RED,
IIO_MOD_LIGHT_GREEN,
IIO_MOD_LIGHT_BLUE,
+ IIO_MOD_QUATERNION,
};
enum iio_event_type {
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread* [Patch v6 5/6] iio: hid-sensors: Added device rotation support
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
` (3 preceding siblings ...)
2014-04-15 18:21 ` [Patch v6 4/6] IIO: core: Add quaternion modifier Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
2014-04-15 18:21 ` [Patch v6 6/6] iio: Added ABI description for quaternion Srinivas Pandruvada
5 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
Added usage id processing for device rotation. This uses IIO
interfaces for triggered buffer to present data to user
mode.This uses HID sensor framework for registering callback
events from the sensor hub.
Data is exported to user space in the form of quaternion rotation
format.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/iio/orientation/Kconfig | 12 +
drivers/iio/orientation/Makefile | 1 +
drivers/iio/orientation/hid-sensor-rotation.c | 348 ++++++++++++++++++++++++++
include/linux/hid-sensor-ids.h | 1 +
4 files changed, 362 insertions(+)
create mode 100644 drivers/iio/orientation/hid-sensor-rotation.c
diff --git a/drivers/iio/orientation/Kconfig b/drivers/iio/orientation/Kconfig
index 58c62c8..e3aa1e5 100644
--- a/drivers/iio/orientation/Kconfig
+++ b/drivers/iio/orientation/Kconfig
@@ -16,4 +16,16 @@ config HID_SENSOR_INCLINOMETER_3D
Say yes here to build support for the HID SENSOR
Inclinometer 3D.
+config HID_SENSOR_DEVICE_ROTATION
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Device Rotation"
+ help
+ Say yes here to build support for the HID SENSOR
+ device rotation. The output of a device rotation sensor
+ is presented using quaternion format.
+
endmenu
diff --git a/drivers/iio/orientation/Makefile b/drivers/iio/orientation/Makefile
index 2c97572..4734dab 100644
--- a/drivers/iio/orientation/Makefile
+++ b/drivers/iio/orientation/Makefile
@@ -4,3 +4,4 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_HID_SENSOR_INCLINOMETER_3D) += hid-sensor-incl-3d.o
+obj-$(CONFIG_HID_SENSOR_DEVICE_ROTATION) += hid-sensor-rotation.o
diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
new file mode 100644
index 0000000..51387bb
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-rotation.c
@@ -0,0 +1,348 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/hid-sensor-hub.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>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+struct dev_rot_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info quaternion;
+ u32 sampled_vals[4];
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec dev_rot_channels[] = {
+ {
+ .type = IIO_ROT,
+ .modified = 1,
+ .channel2 = IIO_MOD_QUATERNION,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS)
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void dev_rot_adjust_channel_bit_mask(struct iio_chan_spec *chan,
+ int size)
+{
+ chan->scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ chan->scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ chan->scan_type.storagebits = sizeof(u32) * 8;
+ chan->scan_type.repeat = 4;
+}
+
+/* Channel read_raw handler */
+static int dev_rot_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int size, int *vals, int *val_len,
+ long mask)
+{
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+ int ret_type;
+ int i;
+
+ vals[0] = 0;
+ vals[1] = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (size >= 4) {
+ for (i = 0; i < 4; ++i)
+ vals[i] = rot_state->sampled_vals[i];
+ ret_type = IIO_VAL_INT_MULTIPLE;
+ *val_len = 4;
+ } else
+ ret_type = -EINVAL;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &rot_state->common_attributes, &vals[0], &vals[1]);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &rot_state->common_attributes, &vals[0], &vals[1]);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int dev_rot_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &rot_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &rot_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info dev_rot_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw_multi = &dev_rot_read_raw,
+ .write_raw = &dev_rot_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data >>\n");
+ iio_push_to_buffers(indio_dev, (u8 *)data);
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data <<\n");
+
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "dev_rot_proc_event [%d]\n",
+ rot_state->common_attributes.data_ready);
+
+ if (rot_state->common_attributes.data_ready)
+ hid_sensor_push_data(indio_dev,
+ (u8 *)rot_state->sampled_vals,
+ sizeof(rot_state->sampled_vals));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int dev_rot_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
+ memcpy(rot_state->sampled_vals, raw_data,
+ sizeof(rot_state->sampled_vals));
+ dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
+ sizeof(rot_state->sampled_vals));
+ }
+
+ return 0;
+}
+
+/* Parse report which is specific to an usage id*/
+static int dev_rot_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct dev_rot_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev,
+ HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_ORIENT_QUATERNION,
+ &st->quaternion);
+ if (ret)
+ return ret;
+
+ dev_rot_adjust_channel_bit_mask(&channels[0],
+ st->quaternion.size / 4);
+
+ dev_dbg(&pdev->dev, "dev_rot %x:%x\n", st->quaternion.index,
+ st->quaternion.report_id);
+
+ dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
+ st->quaternion.size);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_ORIENTATION,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+
+ return 0;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_dev_rot_probe(struct platform_device *pdev)
+{
+ int ret;
+ static char *name = "dev_rotation";
+ struct iio_dev *indio_dev;
+ struct dev_rot_state *rot_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_chan_spec *channels;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev,
+ sizeof(struct dev_rot_state));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ rot_state = iio_priv(indio_dev);
+ rot_state->common_attributes.hsdev = hsdev;
+ rot_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev,
+ HID_USAGE_SENSOR_DEVICE_ORIENTATION,
+ &rot_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
+ sizeof(dev_rot_channels), GFP_KERNEL);
+ if (!channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = dev_rot_parse_report(pdev, hsdev, channels,
+ HID_USAGE_SENSOR_DEVICE_ORIENTATION, rot_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ return ret;
+ }
+
+ indio_dev->channels = channels;
+ indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &dev_rot_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ return ret;
+ }
+ rot_state->common_attributes.data_ready = false;
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &rot_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ rot_state->callbacks.send_event = dev_rot_proc_event;
+ rot_state->callbacks.capture_sample = dev_rot_capture_sample;
+ rot_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev,
+ HID_USAGE_SENSOR_DEVICE_ORIENTATION,
+ &rot_state->callbacks);
+ if (ret) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return 0;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&rot_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_dev_rot_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_DEVICE_ORIENTATION);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&rot_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return 0;
+}
+
+static struct platform_device_id hid_dev_rot_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-20008a",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);
+
+static struct platform_driver hid_dev_rot_platform_driver = {
+ .id_table = hid_dev_rot_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = hid_dev_rot_probe,
+ .remove = hid_dev_rot_remove,
+};
+module_platform_driver(hid_dev_rot_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Device Rotation");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
index 14ead9e..109f0e6 100644
--- a/include/linux/hid-sensor-ids.h
+++ b/include/linux/hid-sensor-ids.h
@@ -76,6 +76,7 @@
#define HID_USAGE_SENSOR_ORIENT_TILT_Y 0x200480
#define HID_USAGE_SENSOR_ORIENT_TILT_Z 0x200481
+#define HID_USAGE_SENSOR_DEVICE_ORIENTATION 0x20008A
#define HID_USAGE_SENSOR_ORIENT_ROTATION_MATRIX 0x200482
#define HID_USAGE_SENSOR_ORIENT_QUATERNION 0x200483
#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX 0x200484
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread* [Patch v6 6/6] iio: Added ABI description for quaternion
2014-04-15 18:21 [Patch v6 0/6] Quaternion support Srinivas Pandruvada
` (4 preceding siblings ...)
2014-04-15 18:21 ` [Patch v6 5/6] iio: hid-sensors: Added device rotation support Srinivas Pandruvada
@ 2014-04-15 18:21 ` Srinivas Pandruvada
5 siblings, 0 replies; 9+ messages in thread
From: Srinivas Pandruvada @ 2014-04-15 18:21 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-kernel, Srinivas Pandruvada
Added documentation for reading quaternion components for 3D rotations.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
Documentation/ABI/testing/sysfs-bus-iio | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 6e02c50..d2c59f9 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -784,6 +784,7 @@ What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
+What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@@ -799,6 +800,7 @@ What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
What: /sys/.../iio:deviceX/scan_elements/in_timestamp_type
What: /sys/.../iio:deviceX/scan_elements/in_pressureY_type
What: /sys/.../iio:deviceX/scan_elements/in_pressure_type
+What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@@ -845,6 +847,7 @@ What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index
What: /sys/.../iio:deviceX/scan_elements/in_pressureY_index
What: /sys/.../iio:deviceX/scan_elements/in_pressure_index
+What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@@ -891,3 +894,12 @@ Contact: linux-iio@vger.kernel.org
Description:
This attribute is used to get/set the integration time in
seconds.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
+KernelVersion: 3.15
+Contact: linux-iio@vger.kernel.org
+Description:
+ Raw value of quaternion components using a format
+ x y z w. Here x, y, and z component represents the axis about
+ which a rotation will occur and w component represents the
+ amount of rotation.
--
1.7.11.7
^ permalink raw reply related [flat|nested] 9+ messages in thread