[U-Boot] [PATCH 0/4] spi: exynos: Improve performance

This patchset has a set of patches which improves the performance of spi on exynos. Have combined all individual patches into a single patchset. Patches are based on u-boot-spi.git master branch.

Rajeshwari S Shinde (3): exynos: Export timer_get_us() to get microsecond timer spi: exynos: Support a delay after deactivate spi: exynos: Minimise access to SPI FIFO level spi: exynos: Support word transfers

arch/arm/include/asm/arch-exynos/spi.h | 11 +++- drivers/spi/exynos_spi.c | 107 +++++++++++++++++++++++++++------ include/common.h | 6 ++ 3 files changed, 104 insertions(+), 20 deletions(-)