topic Re: i.MX535 - LPDDR2 Kernel Config in i.MX Processors

i.MX535 - LPDDR2 Kernel Config

SrideviK — Sat, 30 Nov 2013 13:38:00 GMT

Hi,

We are using Android R10.4 BSP as our reference.

In our custom platform we are using LPDDR2 interfaced to i.MX535 and PMIC used in MC34708.

Basically without Power management we have the device running properly as the Uboot DCD customization is done to meet the LPDDR2 requirement.

But when the power management is enabled & device enters suspend mode, it gets stuck in suspend_in_iram. There are some configurations in suspend.s.

Pls advice on the Kernel changes required with respect to LPDDR2 configuration.

Regards,

Sridevi

AnsonHuang — Mon, 02 Dec 2013 02:17:29 GMT

Hi, Sridevi

I think maybe you can try comment out the DDR IO related power setting(PM_SET_HIGHZ_PAD), as LPDDR2 has different IO settings.

SrideviK — Tue, 03 Dec 2013 13:04:33 GMT

Hi Yongcai Huang,

Yes. Commented out the DDR IO related power setting (PM_SET_HIGHZ_PAD) in suspend.S.

Suspend & Wakeup is working fine.

Thanks for the support.

Regards,

Sridevi