linux mcp2515驱动

yu9148

大神们，求助!!!!

      imx31平台，linux系统  使用两路spi 外接 2路 mcp2515   
      驱动：内核自带的mcp251x.c


问题：
spi_imx spi_imx.0: probed
spi_imx spi_imx.1: probed
CAN device driver interface
---------mcp251x_hw_probe-------1----
mcp251x spi0.0: MCP251x didn't enter in conf mode after reset
CANSTAT 0x00 CANCTRL 0x00
mcp251x spi0.0: Probe failed
mcp251x spi0.0: probe failed
---------mcp251x_hw_probe-------1----
mcp251x spi1.1: MCP251x didn't enter in conf mode after reset
CANSTAT 0x00 CANCTRL 0x00
mcp251x spi1.1: Probe failed
mcp251x spi1.1: probe failed

驱动打印SPI发送复位后，不能进入配置模式！  通过示波器测量SPI确实有发送，时钟，片选正常， 另外测试MCP2515外接无源晶振没有波形，两端只有2.4V电压？？

大神们，这是因为晶体没起振，还是因为软件驱动的问题啊？？？  求助!!!!