system_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_smc.c'))
system_ss.add(when: 'CONFIG_MSF2', if_true: files('mss-spi.c'))
system_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_fiu.c', 'npcm_pspi.c'))
system_ss.add(when: 'CONFIG_PL022', if_true: files('pl022.c'))
system_ss.add(when: 'CONFIG_SIFIVE_SPI', if_true: files('sifive_spi.c'))
system_ss.add(when: 'CONFIG_SSI', if_true: files('ssi.c'))
system_ss.add(when: 'CONFIG_STM32F2XX_SPI', if_true: files('stm32f2xx_spi.c'))
system_ss.add(when: 'CONFIG_XILINX_SPI', if_true: files('xilinx_spi.c'))
system_ss.add(when: 'CONFIG_XILINX_SPIPS', if_true: files('xilinx_spips.c'))
system_ss.add(when: 'CONFIG_XLNX_VERSAL', if_true: files('xlnx-versal-ospi.c'))
system_ss.add(when: 'CONFIG_IMX', if_true: files('imx_spi.c'))
system_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_spi.c'))
system_ss.add(when: 'CONFIG_IBEX', if_true: files('ibex_spi_host.c'))
system_ss.add(when: 'CONFIG_BCM2835_SPI', if_true: files('bcm2835_spi.c'))