erebion/coreboot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Tegra124: SPI: Set and unset CS in spi_claim_bus and spi_release_bus.

Browse source 
These functions are intended to start and end a transaction on the bus and so
need to manage the CS line.

BUG=None
TEST=Used a Logic16 to watch the SPI bus as coreboot attempted to use it to
talk to the EC. With this change, CS was set (low) during the transaction when
before it wasn't.
BRANCH=None

Change-Id: I37992dc2e51dec878d565ebea1da586bdcac6400
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/173953
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
This commit is contained in:
Gabe Black 2013-10-22 05:58:24 -07:00 • committed by chrome-internal-fetch
commit a2df8f3a9c
1 changed files with 2 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/soc/nvidia/tegra124/spi.c
View file

@ -806,9 +806,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
int spi_claim_bus(struct spi_slave *slave)
{
tegra_spi_init(slave->bus);
spi_cs_activate(slave);
return 0;
}
void spi_release_bus(struct spi_slave *slave)
{
spi_cs_deactivate(slave);
}