Quoting Anson Huang (2019-02-13 17:54:08)

On NXP's i.MX SoCs with system controller inside, CPU frequency
scaling can ONLY be done by system controller firmware, and it
can ONLY be requested from secure mode, so Linux kernel has to
call ARM SMC to trap to ARM-Trusted-Firmware to request system
controller firmware to do CPU frequency scaling.

This patch adds i.MX system controller CPU frequency scaling support,
it reuses cpufreq-dt driver and implement the CPU frequency scaling
inside SCU clock driver.

Signed-off-by: Anson Huang <redacted>
---
Changes since V3:
        - use different clk ops for CPU clock to avoid runtime check in clk_set_rate;
        - use rsrc_id to determine whether it is CPU frequency change and also to get
          cluster ID for SMC call.

This directly conflicts with a patch to add get/set parent support from
Aisheng Dong. Can you please work together and rebase the patch on top
of that patch (which is in clk-next) and resend this?


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel