我在board-am335xevm.c中添加如下代码：
/* Module pin mux for SPI fash by xingchu*/
static struct pinmux_config spi1_pin_mux[] = {
{"mcasp0_aclkx.spi1_sclk", OMAP_MUX_MODE3 | AM33XX_PULL_ENBL
| AM33XX_INPUT_EN},
{"mcasp0_fsx.spi1_d0", OMAP_MUX_MODE3 | AM33XX_PULL_ENBL
| AM33XX_PULL_UP | AM33XX_INPUT_EN},
{"mcasp0_axr0.spi1_d1", OMAP_MUX_MODE3 | AM33XX_PULL_ENBL
| AM33XX_INPUT_EN},
{"mcasp0_ahclkr.spi1_cs0", OMAP_MUX_MODE3 | AM33XX_PULL_ENBL
| AM33XX_PULL_UP | AM33XX_INPUT_EN},
{NULL, 0},
};
static struct spi_board_info xxx_spi1_slave_info[] = {
{
.modalias = "xxx_spi_init",
// .platform_data = &xxx_spi_info,
.max_speed_hz = 24000000,
.bus_num = 2,
.chip_select = 0,
.mode = SPI_3WIRE,
},
};
系统启动时打印信息：
spi spi2.0: setup: unsupported mode bits 10