imx6 SDP 1.3Ghz overclocking?

[hyunjaejun]

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

Any issues ?

i don't know a config point.

[adrianmcgrath]

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

[AnsonHuang]

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.

[hyunjaejun]

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?

[AnsonHuang]

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