A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 02:32:09 -04:00
Code Issues Projects Releases Packages Wiki Activity

spi_mpc83xx: add small delay after asserting chip-select line

Browse source 
This is needed for some underlaying GPIO controllers that may be a bit
slow, or if chip-select signal need some time to stabilize.

For what it's worth, we already have the similar delay for chip-select
de-assertion case.

Signed-off-by: Anton Vorontsov <[email protected]>
Cc: Kumar Gala <[email protected]>
Cc: David Brownell <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Anton Vorontsov 2009-06-18 16:49:01 -07:00 • committed by Linus Torvalds
commit 5afbf098d1
1 changed files with 3 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/spi/spi_mpc83xx.c
View file

@ -383,8 +383,10 @@ static void mpc83xx_spi_work(struct work_struct *work)
break;
}
if (cs_change)
if (cs_change) {
mpc83xx_spi_chipselect(spi, BITBANG_CS_ACTIVE);
ndelay(nsecs);
}
cs_change = t->cs_change;
if (t->len)
status = mpc83xx_spi_bufs(spi, t);