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Linux 4.10-rc1
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| What: /sys/bus/fsl-mc/drivers/.../bind | ||
| Date: December 2016 | ||
| Contact: stuart.yoder@nxp.com | ||
| Description: | ||
| Writing a device location to this file will cause | ||
| the driver to attempt to bind to the device found at | ||
| this location. The format for the location is Object.Id | ||
| and is the same as found in /sys/bus/fsl-mc/devices/. | ||
| For example: | ||
| # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/bind | ||
|
|
||
| What: /sys/bus/fsl-mc/drivers/.../unbind | ||
| Date: December 2016 | ||
| Contact: stuart.yoder@nxp.com | ||
| Description: | ||
| Writing a device location to this file will cause the | ||
| driver to attempt to unbind from the device found at | ||
| this location. The format for the location is Object.Id | ||
| and is the same as found in /sys/bus/fsl-mc/devices/. | ||
| For example: | ||
| # echo dpni.2 > /sys/bus/fsl-mc/drivers/fsl_dpaa2_eth/unbind |
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36 changes: 36 additions & 0 deletions
36
Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_altvoltageY_invert | ||
| Date: October 2016 | ||
| KernelVersion: 4.9 | ||
| Contact: Peter Rosin <peda@axentia.se> | ||
| Description: | ||
| The DAC is used to find the peak level of an alternating | ||
| voltage input signal by a binary search using the output | ||
| of a comparator wired to an interrupt pin. Like so: | ||
| _ | ||
| | \ | ||
| input +------>-------|+ \ | ||
| | \ | ||
| .-------. | }---. | ||
| | | | / | | ||
| | dac|-->--|- / | | ||
| | | |_/ | | ||
| | | | | ||
| | | | | ||
| | irq|------<-------' | ||
| | | | ||
| '-------' | ||
| The boolean invert attribute (0/1) should be set when the | ||
| input signal is centered around the maximum value of the | ||
| dac instead of zero. The envelope detector will search | ||
| from below in this case and will also invert the result. | ||
| The edge/level of the interrupt is also switched to its | ||
| opposite value. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_altvoltageY_compare_interval | ||
| Date: October 2016 | ||
| KernelVersion: 4.9 | ||
| Contact: Peter Rosin <peda@axentia.se> | ||
| Description: | ||
| Number of milliseconds to wait for the comparator in each | ||
| step of the binary search for the input peak level. Needs | ||
| to relate to the frequency of the input signal. |
125 changes: 125 additions & 0 deletions
125
Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_count_count_direction_available | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_count_count_mode_available | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_count_noise_error_available | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_index_index_polarity_available | ||
| What: /sys/bus/iio/devices/iio:deviceX/in_index_synchronous_mode_available | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Discrete set of available values for the respective counter | ||
| configuration are listed in this file. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_direction | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Read-only attribute that indicates whether the counter for | ||
| channel Y is counting up or down. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_mode | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Count mode for channel Y. Four count modes are available: | ||
| normal, range limit, non-recycle, and modulo-n. The preset value | ||
| for channel Y is used by the count mode where required. | ||
|
|
||
| Normal: | ||
| Counting is continuous in either direction. | ||
|
|
||
| Range Limit: | ||
| An upper or lower limit is set, mimicking limit switches | ||
| in the mechanical counterpart. The upper limit is set to | ||
| the preset value, while the lower limit is set to 0. The | ||
| counter freezes at count = preset when counting up, and | ||
| at count = 0 when counting down. At either of these | ||
| limits, the counting is resumed only when the count | ||
| direction is reversed. | ||
|
|
||
| Non-recycle: | ||
| Counter is disabled whenever a 24-bit count overflow or | ||
| underflow takes place. The counter is re-enabled when a | ||
| new count value is loaded to the counter via a preset | ||
| operation or write to raw. | ||
|
|
||
| Modulo-N: | ||
| A count boundary is set between 0 and the preset value. | ||
| The counter is reset to 0 at count = preset when | ||
| counting up, while the counter is set to the preset | ||
| value at count = 0 when counting down; the counter does | ||
| not freeze at the bundary points, but counts | ||
| continuously throughout. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_noise_error | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Read-only attribute that indicates whether excessive noise is | ||
| present at the channel Y count inputs in quadrature clock mode; | ||
| irrelevant in non-quadrature clock mode. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_preset | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| If the counter device supports preset registers, the preset | ||
| count for channel Y is provided by this attribute. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_quadrature_mode | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Configure channel Y counter for non-quadrature or quadrature | ||
| clock mode. Selecting non-quadrature clock mode will disable | ||
| synchronous load mode. In quadrature clock mode, the channel Y | ||
| scale attribute selects the encoder phase division (scale of 1 | ||
| selects full-cycle, scale of 0.5 selects half-cycle, scale of | ||
| 0.25 selects quarter-cycle) processed by the channel Y counter. | ||
|
|
||
| Non-quadrature: | ||
| The filter and decoder circuit are bypassed. Encoder A | ||
| input serves as the count input and B as the UP/DOWN | ||
| direction control input, with B = 1 selecting UP Count | ||
| mode and B = 0 selecting Down Count mode. | ||
|
|
||
| Quadrature: | ||
| Encoder A and B inputs are digitally filtered and | ||
| decoded for UP/DN clock. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_countY_set_to_preset_on_index | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Whether to set channel Y counter with channel Y preset value | ||
| when channel Y index input is active, or continuously count. | ||
| Valid attribute values are boolean. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_indexY_index_polarity | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Active level of channel Y index input; irrelevant in | ||
| non-synchronous load mode. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/in_indexY_synchronous_mode | ||
| KernelVersion: 4.9 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Configure channel Y counter for non-synchronous or synchronous | ||
| load mode. Synchronous load mode cannot be selected in | ||
| non-quadrature clock mode. | ||
|
|
||
| Non-synchronous: | ||
| A logic low level is the active level at this index | ||
| input. The index function (as enabled via | ||
| set_to_preset_on_index) is performed directly on the | ||
| active level of the index input. | ||
|
|
||
| Synchronous: | ||
| Intended for interfacing with encoder Index output in | ||
| quadrature clock mode. The active level is configured | ||
| via index_polarity. The index function (as enabled via | ||
| set_to_preset_on_index) is performed synchronously with | ||
| the quadrature clock on the active level of the index | ||
| input. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| What: /sys/bus/iio/devices/iio:deviceX/calibrate | ||
| Date: July 2015 | ||
| KernelVersion: 4.7 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| Writing '1' will perform a FOC (Fast Online Calibration). The | ||
| corresponding calibration offsets can be read from *_calibbias | ||
| entries. | ||
|
|
||
| What: /sys/bus/iio/devices/iio:deviceX/location | ||
| Date: July 2015 | ||
| KernelVersion: 4.7 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| This attribute returns a string with the physical location where | ||
| the motion sensor is placed. For example, in a laptop a motion | ||
| sensor can be located on the base or on the lid. Current valid | ||
| values are 'base' and 'lid'. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw_available | ||
| Date: October 2016 | ||
| KernelVersion: 4.9 | ||
| Contact: Peter Rosin <peda@axentia.se> | ||
| Description: | ||
| The range of available values represented as the minimum value, | ||
| the step and the maximum value, all enclosed in square brackets. | ||
| Example: [0 1 256] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| What: /sys/bus/iio/devices/iio:deviceX/proximity_on_chip_ambient_infrared_suppression | ||
| Date: January 2011 | ||
| KernelVersion: 2.6.37 | ||
| Contact: linux-iio@vger.kernel.org | ||
| Description: | ||
| From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the | ||
| infrared suppression: | ||
|
|
||
| Scheme 0, makes full n (4, 8, 12, 16) bits (unsigned) proximity | ||
| detection. The range of Scheme 0 proximity count is from 0 to | ||
| 2^n. Logic 1 of this bit, Scheme 1, makes n-1 (3, 7, 11, 15) | ||
| bits (2's complementary) proximity_less_ambient detection. The | ||
| range of Scheme 1 proximity count is from -2^(n-1) to 2^(n-1). | ||
| The sign bit is extended for resolutions less than 16. While | ||
| Scheme 0 has wider dynamic range, Scheme 1 proximity detection | ||
| is less affected by the ambient IR noise variation. | ||
|
|
||
| 0 Sensing IR from LED and ambient | ||
| 1 Sensing IR from LED with ambient IR rejection |
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