topic Re: Can I have code example how to read DCFG_CCSR_FUSESR register. Thanks in T-Series

Can I have code example how to read DCFG_CCSR_FUSESR register. Thanks

sergeyuskach — Thu, 16 Jul 2015 12:21:30 GMT

Can I have code example how to read DCFG_CCSR_FUSESR register. Thanks

hi ,

thanks for the answer but I would like to look if it is possible for the function fusesr = in_be32(&gur->dcfg_fusesr); in yiou sample attached.

Message was edited by: Sergey Uskach

Re: Can I have code example how to read DCFG_CCSR_FUSESR register. Thanks

lunminliang — Tue, 21 Jul 2015 06:48:22 GMT

Hello Sergey Uskach,

As it's memory-mapped CCSR register, access it at its address list in reference manual. What's your problem of reading this register?

There is code in U-boot reading this register, see attached code in board\freescale\common\vid.c

Have a great day,
Lunmin

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Re: Can I have code example how to read DCFG_CCSR_FUSESR register. Thanks

lunminliang — Mon, 27 Jul 2015 09:03:34 GMT

Hello Sergey Uskach,

The function in_be32( ) is an inline function for PowerPC defined in u-boot:

extern inline u32 in_be32(const volatile unsigned __iomem *addr)
{
u32 ret;

     __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
        "twi 0,%0,0;\n"
        "isync" : "=r" (ret) : "m" (*addr));
      return ret;
}

Have a great day,
Lunmin