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| author | Lothar Waßmann <LW@KARO-electronics.de> | 2013-07-05 16:28:00 (GMT) |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-08-16 16:09:05 (GMT) |
| commit | 869c6a3ededbb108b03a11a7c9d4c8a4fb607063 (patch) | |
| tree | 428951cc716dc7ea6fd131314f40e1ec872ac35d /samples | |
| parent | b7d12a8667d78ba340829280da8ff62d3b733664 (diff) | |
| download | linux-869c6a3ededbb108b03a11a7c9d4c8a4fb607063.tar.xz | |
i2c: mxs: fix broken timing calculation
The timing calculation is rather bogus and gives extremely wrong
results for higher frequencies (on an i.MX28). E.g. instead of 400 kHz
I measured 770 kHz.
Implement a calculation that adheres to the I2C spec and gives exact
results for I2C frequencies from 12.56 kHz to 960 kHz.
Also the bus_free and leadin parameters are programmed according to
the I2C spec for standard and fast mode.
This was tested on a Ka-Ro TX28 module with a DS1339, TSC2007, PCA9554
and SGTL5000 client.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Marek Vasut <marex@denx.de>
[wsa: patch fixes whitespace issue, too]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions