linux-kernel - RE: [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt

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Message-ID: <AM0PR04MB4481FF78BB300729E59D6D8C88E70@AM0PR04MB4481.eurprd04.prod.outlook.com>
Date:   Mon, 2 Mar 2020 01:40:30 +0000
From:   Peng Fan <peng.fan@....com>
To:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Abel Vesa <abel.vesa@....com>
Subject: RE: [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt

Hi Shawn,

> Subject: [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt

Is it possible for you to pick up patch 1~8, 12? Or any comments?

Thanks,
Peng.

> 
> From: Peng Fan <peng.fan@....com>
> 
> V2:
>  Per Stephen's comments, I drop the cpuv2 clk code, and find another
> solution to change ARM clk  Included get_intermediate/target_intermedate
> for cpufreq-dt  Add i.MX7ULP intermedidate implementation.
>  Per Fabio's comments, disallow HSRUN when LDO enabled.
>  Add dt-bindings and pmc node
> 
> V1:
>  https://patchwork.kernel.org/patch/11364609/
> 
> This patchset aims to use cpufreq-dt for i.MX7ULP to avoid plaform specific
> cpufreq driver. i.MX7ULP has some specicial requirements to change ARM
> core clock, see patch 11/13,
> "cpufreq: imx-cpufreq-dt: support i.MX7ULP"
> 
> Patch [1,2]/13: add pmc bindings and node. We need read pmc registers
>   to get system info.
> Patch [3-6]/13: i.MX7ULP clk pfd/pll code change to make sure to get the
>   expected pfd output clk. For RUN/HSRUN clock, we use API
>   imx_clk_hw_cpu to make sure RUN or HSRUN could not shutdown clock
> output.
> 
> Patch [7-8]/13: Make sure we could run into HSRUN mode and not when LDO
>   enabled.
> 
> Patch 9/13: let cpufred-dt could have get_intermediate/target_intermediate
>   hooks to allow platform specific freq set.
> 
> Patch [10-12]/13: i.MX7ULP cpufreq support
> 
> Patch 13/13: Test dts, should not apply.
> 
> For rpmsg/vitio part, I have posted patchset, if you wanna rpmsg regulator:
> https://patchwork.kernel.org/cover/11390481/
> 
> Anson Huang (1):
>   clk: imx: Fix division by zero warning on pfdv2
> 
> Peng Fan (13):
>   dt-bindings: fsl: add i.MX7ULP PMC binding doc
>   ARM: dts: imx7ulp: add pmc node
>   clk: imx: pfdv2: switch to use determine_rate
>   clk: imx: pfdv2: determine best parent rate
>   clk: imx: pllv4: use prepare/unprepare
>   clk: imx7ulp: make it easy to change ARM core clk
>   ARM: imx: imx7ulp: support HSRUN mode
>   ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN
>   cpufreq: dt: Allow platform specific intermediate callbacks
>   cpufreq: Add i.MX7ULP to cpufreq-dt-platdev blacklist
>   cpufreq: imx-cpufreq-dt: support i.MX7ULP
>   ARM: imx7ulp: enable cpufreq
>   [Do not Apply] ARM: dts: imx7ulp: add cpu OPP points
> 
>  .../bindings/arm/freescale/imx7ulp_pmc.yaml        | 32 +++++++++
>  arch/arm/boot/dts/imx7ulp.dtsi                     | 38 ++++++++++
>  arch/arm/mach-imx/common.h                         |  1 +
>  arch/arm/mach-imx/cpuidle-imx7ulp.c                | 14 +++-
>  arch/arm/mach-imx/mach-imx7ulp.c                   |  3 +
>  arch/arm/mach-imx/pm-imx7ulp.c                     | 25 +++++++
>  drivers/clk/imx/clk-imx7ulp.c                      |  6 +-
>  drivers/clk/imx/clk-pfdv2.c                        | 61
> +++++++++++-----
>  drivers/clk/imx/clk-pllv4.c                        | 12 ++--
>  drivers/cpufreq/cpufreq-dt-platdev.c               |  1 +
>  drivers/cpufreq/cpufreq-dt.c                       |  4 ++
>  drivers/cpufreq/cpufreq-dt.h                       |  4 ++
>  drivers/cpufreq/imx-cpufreq-dt.c                   | 83
> +++++++++++++++++++++-
>  include/dt-bindings/clock/imx7ulp-clock.h          |  5 +-
>  14 files changed, 257 insertions(+), 32 deletions(-)  create mode 100644
> Documentation/devicetree/bindings/arm/freescale/imx7ulp_pmc.yaml
> 
> --
> 2.16.4