查/var/log/syslog,有如下记录:
rockchip-spi feb10000.spi: no high_speed pinctrl state
rockchip-spi feb20000.spi: no high_speed pinctrl state
rk806 spi2.0: chip id RD806,ver:0x2,0x1
rk806 spi2.0: ON: 0x40 OFF: 0x0
rk806 spi2.0: no sleep-setting state
rk806 spi2.0: no reset-setting pinctrl state
rk806 spi2.0: no dvs-setting pinctrl state
register firefly_spi_init spi return v =:0
....
input: rk805 pwrkey as devices/platform/feb20000.spi/spi_master/spi2/spi2.0/rk805-pwrkey.2.auto/input/input6
....
register spi return v =:0
以上记录未发现SPI成功挂载的信息,而可查到UART7成功挂载的信息,如下:
feba0000.serial: ttyS7 at MMIO 0xfeba0000(irq = 92, base_baud = 1500000) is a 16550A