Re: [PATCH V7 2/2] clk: imx: scu: add cpu frequency scaling support

2019-02-26 Thread Stephen Boyd
Quoting Anson Huang (2019-02-25 21:17:36) > 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 sys

[PATCH V7 2/2] clk: imx: scu: add cpu frequency scaling support

2019-02-25 Thread Anson Huang
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 scalin