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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2014-12-29 10:27:20 +0000 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-01-05 18:59:56 +0000 |
| commit | a5b940fa4ac0c4d8d9e07bda17a68a042e4d1d94 (patch) | |
| tree | 040029358bb5bba0b454eb53f6802165f699eb21 /Documentation | |
| parent | 6a191c7025f80c328156a358871f5d947f443aa9 (diff) | |
| download | op-kernel-dev-a5b940fa4ac0c4d8d9e07bda17a68a042e4d1d94.zip op-kernel-dev-a5b940fa4ac0c4d8d9e07bda17a68a042e4d1d94.tar.gz | |
DT: mxs-lradc: fix ranges of ts properties
This patch fixes off-by-one issues in the devicetree binding of
mxs-lradc.
According to the i.MX23 and i.MX28 reference manuals [1][2] the range of
NUM_SAMPLES is 0..31, but property ave-ctrl is substracted by 1 before used.
Considering all limitations the range of DELAY is 1..2047, but also
property ave-delay is substracted by 1 before used.
The patch has been suggested by Hartmut Knaack and Kristina Martsenko.
[1] - http://cache.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf
[2] - http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdf
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt b/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt index ee05dc3..3075377 100644 --- a/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt +++ b/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt @@ -12,9 +12,9 @@ Optional properties: property is not present, then the touchscreen is disabled. 5 wires is valid for i.MX28 SoC only. - fsl,ave-ctrl: number of samples per direction to calculate an average value. - Allowed value is 1 ... 31, default is 4 + Allowed value is 1 ... 32, default is 4 - fsl,ave-delay: delay between consecutive samples. Allowed value is - 1 ... 2047. It is used if 'fsl,ave-ctrl' > 1, counts at + 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at 2 kHz and its default is 2 (= 1 ms) - fsl,settling: delay between plate switch to next sample. Allowed value is 1 ... 2047. It counts at 2 kHz and its default is |
