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Yuji Sasaki 88a8824951 Gale: spi: add vector operation method 
Adding spi_xfer_two_vectors as .xfer_vector for ipq40xx spi_ctrlr.
Commit 22e7b86790 ("UPSTREAM: spi: Get rid of SPI_ATOMIC_SEQUENCING")
has added new driver method xfer_vector to support combined write-read
operation within single CS cycle. The metohd is wrapped in
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 quick fix to prevent this.

BUG=None
BRANCH=none
TEST=built and run on Gale
Change-Id: I031e85ce5b847353cb1084f6f68b2af8c6f702e1
Signed-off-by: Yuji Sasaki <sasakiy@google.com>
Reviewed-on: https://chromium-review.googlesource.com/433439
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Kan Yan <kyan@google.com>
2017-02-03 17:52:18 -08:00
..
broadcom/cygnus UPSTREAM: spi: Get rid of SPI_ATOMIC_SEQUENCING 2017-01-05 11:00:04 -08:00
dmp/vortex86ex UPSTREAM: src/soc: Capitalize CPU, ACPI, RAM and ROM 2016-08-04 23:37:59 -07:00
imgtec/pistachio UPSTREAM: spi: Get rid of SPI_ATOMIC_SEQUENCING 2017-01-05 11:00:04 -08:00
intel UPSTREAM: soc/intel/skylake: Include I2C code in romstage 2017-01-23 02:03:25 -08:00
lowrisc/lowrisc UPSTREAM: soc/lowrisc: Place CBMEM at top of autodetected RAM 2016-12-08 12:30:55 -08:00
marvell UPSTREAM: soc/marvell/mvmap2315: Mark mvmap2315_reset() as noreturn 2017-01-13 18:41:29 -08:00
mediatek/mt8173 UPSTREAM: spi: Get rid of SPI_ATOMIC_SEQUENCING 2017-01-05 11:00:04 -08:00
nvidia UPSTREAM: spi: Define and use spi_ctrlr structure 2016-12-08 12:30:16 -08:00
qualcomm Gale: spi: add vector operation method 2017-02-03 17:52:18 -08:00
rdc/r8610 rdc/r8610: Move to src/soc 2016-05-05 20:08:58 +02:00
rockchip UPSTREAM: rockchip/rk3399: use our ARM compiler to build rk3399m0 firmware 2017-01-22 05:03:16 -08:00
samsung UPSTREAM: samsung/exynos5420: Fix test for src < 0 2016-12-16 15:42:11 -08:00
ucb/riscv UPSTREAM: soc/ucb/riscv: Place CBMEM at top of autodetected RAM 2016-12-08 12:30:48 -08:00