imx6 SDP 1.3Ghz overclocking?

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imx6 SDP 1.3Ghz overclocking?

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hyunjaejun
Contributor II

Has anyone tried to overclock the imx6 sabresdp to 1.3GHz ?


Any issues ?


i don't know a config point.

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adrianmcgrath
Contributor III

I don't know if anyone is still interested in this thread? If so, have a look at the link below. The poster modified an older kernel but the config settings will be of use to implement in a more recent kernel.

UDOO i.MX6 overclocked (1.2GHz) | UDOO Forum

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AnsonHuang
NXP Employee
NXP Employee

Hi, hyunjae

     Our BSP do NOT support 1.3GHz on our i.MX6 Sabre SDP platform, the max speed is 1.2GHz, so there is no config for 1.3GHz.

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hyunjaejun
Contributor II

Hi, Yongcai Huang

I found clock configuration in cpu_op-mx6.c

void mx6_cpu_op_init(void)

{

  unsigned int reg;

  void __iomem *base;

  if (!cpu_is_mx6sl()) {

  /*read fuse bit to know the max cpu freq : offset 0x440

  * bit[17:16]:SPEED_GRADING[1:0],for mx6dq/dl*/

  base = IO_ADDRESS(OCOTP_BASE_ADDR);

  reg = __raw_readl(base + 0x440);

  reg &= (0x3 << OCOTP_SPEED_BIT_OFFSET);

  reg >>= OCOTP_SPEED_BIT_OFFSET;

  /*choose the little value to run lower max cpufreq*/

  arm_max_freq = CPU_AT_1_2GHz;     //   Modify  1.2 GHz

}

Then, I run a my camera preview application.

but, my application went down.


Is a max frequency unstable?

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AnsonHuang
NXP Employee
NXP Employee

We didn't have unstable issue on max freq, you need to check your board, can you measure the VDDARM_CAP, VDDSOC/PU_CAP?

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