linux mcp2515驅(qū)動(dòng)

yu9148

大神們，求助!!!!

      imx31平臺(tái)，linux系統(tǒng)  使用兩路spi 外接 2路 mcp2515   
      驅(qū)動(dòng)：內(nèi)核自帶的mcp251x.c


問(wèn)題：
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

驅(qū)動(dòng)打印SPI發(fā)送復(fù)位后，不能進(jìn)入配置模式！  通過(guò)示波器測(cè)量SPI確實(shí)有發(fā)送，時(shí)鐘，片選正常， 另外測(cè)試MCP2515外接無(wú)源晶振沒(méi)有波形，兩端只有2.4V電壓？？

大神們，這是因?yàn)榫�體沒(méi)起振，還是因?yàn)檐浖��?qū)動(dòng)的問(wèn)題�。�？？  求助!!!!