[U-Boot] [PATCH 0/2 V4] SPI: Enable SPI_PREAMBLE Mode

This patch set enables PREAMBLE Mode for EXYNOS SPI.

Changes in v2: - Remove preamable_count variable which is not really needed - Fix checkpatch warning (multiple assignments) Changes in V3: - Modified the if logic in spi_rx_tx function - Added blank lines as suggested by Minkyu Kang. - Removed in_bytes check in while loop. - Added a error check. Changes in V4: - Corrected a if condition. Rajeshwari Shinde (2): SPI: Add support for preamble bytes EXYNOS: SPI: Support SPI_PREAMBLE mode

drivers/spi/exynos_spi.c | 69 +++++++++++++++++++++++++++++++++++++++------ include/spi.h | 5 +++ 2 files changed, 64 insertions(+), 10 deletions(-)