Add to support Exynos Auto v9 SoC's spi. By supporting USI(Universal Serial Interface) mode, the SoC can support up to 12 spi ports. Thus, we need to increase MAX_SPI_PORTS from 6 to 12. The spi of the SoC can support loopback mode unlike previous exynos SoCs. To separate the feature, we need to add .has_loopback to the s3c64xx_spi_port_config. Furthermore, it uses 4 as the default internal clock divider. We also need to clk_div field of the structure. If the value is specified, the value will be used. Otherwise, "2" will be the default value of the divider. Device tree definitions of exynosautov9-spi will be added in separated patchset to include usi(i2c/uart/spi) nodes all together. Chanho Park (5): spi: spi-s3c64xx: increase MAX_SPI_PORTS to 12 spi: s3c64xx: support loopback mode spi: s3c64xx: support custom value of internal clock divider dt-bindings: samsung,spi: define exynosautov9 compatible spi: s3c64xx: add spi port configuration for Exynos Auto v9 SoC .../devicetree/bindings/spi/samsung,spi.yaml | 5 +- drivers/spi/spi-s3c64xx.c | 49 +++++++++++++++---- 2 files changed, 44 insertions(+), 10 deletions(-) -- 2.36.1
