Is it possible to add some gpio chip select for support more than one chip select on board ? Loooked on ... ers/spi/spi-sunxi.c I am not found any support of gpio here.   Also here we can see that only one chip select can be used:   /* About CS */ #ifdef CONFIG_ARCH_SUN8IW1P1 #define SUNXI_CS_BITMAP(ch) (ch%2 == 0 ? 1 : 3) #define SUNXI_CS_NUM(ch) (ch%2 == 0 ?