From 292d4e120efe46deee1c06989e3acb2ddfd6d060 Mon Sep 17 00:00:00 2001 From: Yuji Sasaki Date: Thu, 26 Jan 2017 10:17:45 -0800 Subject: qualcomm/ipq40xx: add vector operation method to SPI MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adding spi_xfer_two_vectors as .xfer_vector for ipq40xx spi_ctrlr. Commit c2973d196d1 ("UPSTREAM: spi: Get rid of SPI_ATOMIC_SEQUENCING") has added a new driver method xfer_vector to support combined write-read operation within a single CS cycle. The method is wrapped in the spi_xfer_vector() API. When spi_ctrlr structure does not have xfer_vector method, API calls write and read operations sequentially. However the QCA40xx SPI driver has "forced" CS activation-inactivation in xfer method, so individual operation will break CS after write operation, making combined write-read cycle broken. Adding xfer_vector method to spi_ctrlr is a simple fix to prevent this. BUG=None BRANCH=none TEST=built and run on Gale Change-Id: I2258e563d0793bcacd626f78b8e96b3649a8e4a4 Signed-off-by: Patrick Georgi Original-Commit-Id: 88a8824951cef4fe293dfa6e3a1a837ae07b6156 Original-Change-Id: I031e85ce5b847353cb1084f6f68b2af8c6f702e1 Original-Signed-off-by: Yuji Sasaki Original-Reviewed-on: https://chromium-review.googlesource.com/433439 Original-Reviewed-by: Aaron Durbin Original-Reviewed-by: Kan Yan Reviewed-on: https://review.coreboot.org/18297 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer Reviewed-by: Martin Roth --- src/soc/qualcomm/ipq40xx/spi.c | 1 + 1 file changed, 1 insertion(+) (limited to 'src') diff --git a/src/soc/qualcomm/ipq40xx/spi.c b/src/soc/qualcomm/ipq40xx/spi.c index 6d044b32f2..68c2dd0b72 100644 --- a/src/soc/qualcomm/ipq40xx/spi.c +++ b/src/soc/qualcomm/ipq40xx/spi.c @@ -656,6 +656,7 @@ static const struct spi_ctrlr spi_ctrlr = { .claim_bus = spi_ctrlr_claim_bus, .release_bus = spi_ctrlr_release_bus, .xfer = spi_ctrlr_xfer, + .xfer_vector = spi_xfer_two_vectors, }; int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave) -- cgit v1.2.3