Defined in 4 files as a function:
- sys/arm/freescale/imx/imx_spi.c, line 410 (as a function)
- sys/arm/freescale/vybrid/vf_spi.c, line 250 (as a function)
- sys/arm/samsung/exynos/exynos5_spi.c, line 191 (as a function)
- sys/dev/xilinx/axi_quad_spi.c, line 180 (as a function)