Hi, Stephen Best Regards! Anson Huang > -----Original Message----- > From: Stephen Boyd [mailto:sboyd@xxxxxxxxxx] > Sent: 2019年2月22日 4:48 > To: devicetree@xxxxxxxxxxxxxxx; festevam@xxxxxxxxx; > kernel@xxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux- > clk@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; mark.rutland@xxxxxxx; > mturquette@xxxxxxxxxxxx; robh+dt@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; > shawnguo@xxxxxxxxxx; viresh.kumar@xxxxxxxxxx; Aisheng Dong > <aisheng.dong@xxxxxxx>; Anson Huang <anson.huang@xxxxxxx>; Daniel > Baluta <daniel.baluta@xxxxxxx> > Cc: dl-linux-imx <linux-imx@xxxxxxx> > Subject: Re: [PATCH V4 2/2] clk: imx: scu: add cpu frequency scaling support > > 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 <Anson.Huang@xxxxxxx> > > --- > > 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? I have resent the patch set based on top of clk-next and tested the function. Please apply this resent patch, https://patchwork.kernel.org/patch/10825085/ Thanks, Anson.
