When running the busfreq driver on a custom board with i.MX6Q PoP CPU with LPDDR2 PoP memory, the system hangs when performing a frequency update.
If frequency scaling is disabled (), this crash is avoided.
When I studied busfreq-imx6.c, busfreq_ddr3.c, and busfreq_lpddr2.c source files, I did not find the expected imx6q/LPDDR2 entries,
only for imx6sl and imx6sx.
Is maybe i.MX6Q/LPPDR2 not supported yet, is the driver obsolete or did I miss something?
Some details about the configuration:
Linux kernel: Based on imx_3.14.28_1.0.0_ga
CPU: Freescale iMX6Q rev 1.5
PoP Memory: MT42L128M64D2LL-25-AT
Btw, U-Boot works as expected, so the LPDDR2 initialization seems to be OK!