Defined in 4 files as a function:
- sys/arm/freescale/imx/imx_spi.c, line 574 (as a function)
- sys/arm/freescale/vybrid/vf_spi.c, line 133 (as a function)
- sys/arm/samsung/exynos/exynos5_spi.c, line 97 (as a function)
- sys/dev/xilinx/axi_quad_spi.c, line 112 (as a function)