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author | David Hendricks <dhendrix@chromium.org> | 2014-04-11 19:48:55 -0700 |
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committer | Marc Jones <marc.jones@se-eng.com> | 2014-12-17 04:51:28 +0100 |
commit | 032c84381751bab0fe1da2e963af41cbe52c303d (patch) | |
tree | d41094b25b849379980b81cbb526fce23620501c /src/soc/nvidia/tegra124/Kconfig | |
parent | f101bbe4f07b154cb58212a2913112e6ffbce4d0 (diff) | |
download | coreboot-032c84381751bab0fe1da2e963af41cbe52c303d.tar.xz |
spi_flash: Move (de-)assertion of /CS to single location
This consolidates all calls to spi_claim_bus() and spi_release_bus()
to a single location where spi_xfer() is called. This avoids confusing
(and potentially redundant) calls that were being done throughout the
generic spi_flash.c functions and chip-specific functions.
I don't think the current approach could even work since many chip
drivers assert /CS once and then issue multiple commands such as page
program followed by reading the status register. I suspect the reason
we didn't notice it on x86 is because the ICH/PCH handled each
individual command correctly (spi_claim_bus() and spi_release_bus()
are noops) in spite of the broken code.
BUG=none
BRANCH=none
TEST=tested on nyan and link
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Original-Change-Id: I3257e2f6a2820834f4c9018069f90fcf2bab05f6
Original-Reviewed-on: https://chromium-review.googlesource.com/194510
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Commit-Queue: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit d3394d34fb49e9e252f67371674d5b3aa220bc9e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ieb62309b18090d8f974f91a6e448af3d65dd3d1d
Reviewed-on: http://review.coreboot.org/7829
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/soc/nvidia/tegra124/Kconfig')
0 files changed, 0 insertions, 0 deletions