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authorGabor Juhos <juhosg@openwrt.org>2012-12-27 10:42:24 +0100
committerGrant Likely <grant.likely@secretlab.ca>2013-02-05 13:57:02 +0100
commit440114fdb13cbc53ea734bcc05b86bcf5b1e430c (patch)
tree142bd5e2a53569a200011624d7bf2a8863eab3dd /fs/eventpoll.c
parentmxs/spi: clear XFER_COUNT in ctrl0 field in DMA descriptor (diff)
downloadlinux-440114fdb13cbc53ea734bcc05b86bcf5b1e430c.tar.xz
linux-440114fdb13cbc53ea734bcc05b86bcf5b1e430c.zip
spi/ath79: add delay between SCK changes
The driver uses the "as fast as it can" approach to drive the SCK signal. However this does not work with certain low speed SPI chips (e.g. the PCF2123 RTC chip). The patch adds per-bit slowdowns in order to be able to use the driver with such chips as well. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'fs/eventpoll.c')
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