[coreboot-gerrit] Change in coreboot[master]: soc/sifive/fu540: test and fix code of fu540 spi

[Xiang Wang (Code Review)]

Hello Patrick Rudolph, ron minnich, Arthur Heymans, Shawn C, build bot (Jenkins), Philipp Hug,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/35117

to look at the new patch set (#6).

Change subject: soc/sifive/fu540: test and fix code of fu540 spi
......................................................................

soc/sifive/fu540: test and fix code of fu540 spi

I tested the SPI through the SD card and fixed sd card communication problem.
Added two functions (claim_bus and release_bus). Setting CS signal is invalid by
default.

Change-Id: I60033a148c21bbd5b4946580f6cab0b439d346c6
Signed-off-by: Xiang Wang 
---
M src/soc/sifive/fu540/spi.c
1 file changed, 27 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/17/35117/6