Felix Radensky wrote: > Hi, > > Almost all MPC85XX based systems have the compatible=:"fsl-i2c" in > respective > i2c device tree nodes. This causes FSL i2c driver to use the following > "backward > compatible" values: FSR=0x31 DFSR=0x10. This is regardless of CCB clock > frequency and i2c clock prescaler. > > On my custom MPC8536 based board with 432MHz CCB clock this results in > 65KHz i2c clock frequency (checked with scope). U-Boot correctly configures > the clock to 400KHz. > > I've fixed the problem by modifying device tree to use different > compatible value, > similar to what socrates board does. Is this the right approach ?
Are you aware of the properties described in "Documentation/powerpc/dts-bindings/fsl/i2c.txt": http://lxr.linux.no/#linux+v2.6.32/Documentation/powerpc/dts-bindings/fsl/i2c.txt Wolfgang. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
