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| author | Julius Werner <[email protected]> | 2015-03-26 23:30:25 +0000 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2015-03-27 00:42:21 +0000 |
| commit | 76b17e6e4923e4138ed9a4d480cba148ff239dc9 (patch) | |
| tree | df93239b9d52f60f9031e3b66aefd5a5153e454f /net/switchdev/switchdev.c | |
| parent | spi/rockchip: do an error handling in proper time (diff) | |
| download | kernel-76b17e6e4923e4138ed9a4d480cba148ff239dc9.tar.gz kernel-76b17e6e4923e4138ed9a4d480cba148ff239dc9.zip | |
spi/rockchip: Add device tree property to configure Rx Sample Delay
We have found that we can sometimes see read failures on boards with
high-capacitance SPI lines. It seems that the controller samples the Rx
data line too early, and its register interface has an "Rx Sample Delay"
setting to fine-tune against this issue.
This patch adds a new optional device tree entry that can configure this
delay in terms of nanoseconds. The kernel will calculate the
best-fitting amount of parent clock ticks to program the controller with
based on that.
Signed-off-by: Julius Werner <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions