linux-kernel - Re: [PATCH 0/7] PM / OPP: per OPP node clock support and imx7ulp cpufreq driver

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Date:   Mon, 11 Sep 2017 15:28:06 +0800
From:   Dong Aisheng <dongas86@...il.com>
To:     Dong Aisheng <aisheng.dong@....com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, sboyd@...eaurora.org,
        vireshk@...nel.org, nm@...com, rjw@...ysocki.net,
        shawnguo@...nel.org, Anson.Huang@....com, ping.bai@....com
Subject: Re: [PATCH 0/7] PM / OPP: per OPP node clock support and imx7ulp
 cpufreq driver

Hi Viresh and Rafael,

On Thu, Aug 24, 2017 at 12:10:03AM +0800, Dong Aisheng wrote:
> This patch series does three things:
> 1) Add platform specific set_clk function
> 2) Add per OPP node clock support
> 3) Add imx7ulp cpufreq driver support
> 
> 3 is depends on 1 & 2.
> 
> MX7ULP supports HSRUN mode (528 Mhz), RUN mode (413 Mhz) and VLPR mode
> (restricted to FIRC clock, usually 48 Mhz). This patch adds the cpufreq
> driver support for HSRUN and RUN mode.
> When in different modes, the A7 core is using different clocks:
> RUN:	clk run_divcore
> HSRUN:	clk hsrun_divcore
> 
> Thus, this driver replies on the newly added features in OPP core framework
> patch 1~6: e.g.
> "PM / OPP: use OPP node clock to set CPU frequency"
> 
> And since IMX7ULP CPU clock setting is different from the generic
> set OPP clock, we also implemented a private set_clk function.
> 
> Dong Aisheng (7):
>   PM / OPP: Add platform specific set_clk function
>   dt-bindings: PM / OPP: add clocks per OPP node support
>   PM / OPP: rename opp_table->clk to opp_table->cur_clk
>   PM / OPP: use OPP node clock to set CPU frequency
>   PM / OPP: Add dev_pm_opp_get_cur_clk()
>   cpufreq: make cpufreq_generic_init transition_latency default to
>     CPUFREQ_ETERNAL
>   cpufreq: add imx7ulp cpufreq driver
> 

Do you have any comments about this series?

Regards
Dong Aisheng

>  Documentation/devicetree/bindings/opp/opp.txt |  52 ++++++
>  drivers/base/power/opp/core.c                 | 155 ++++++++++++++---
>  drivers/base/power/opp/of.c                   |   8 +
>  drivers/base/power/opp/opp.h                  |  11 +-
>  drivers/cpufreq/Kconfig.arm                   |   8 +
>  drivers/cpufreq/Makefile                      |   1 +
>  drivers/cpufreq/cpufreq.c                     |   2 +
>  drivers/cpufreq/imx7ulp-cpufreq.c             | 234 ++++++++++++++++++++++++++
>  include/linux/pm_opp.h                        |  16 ++
>  9 files changed, 466 insertions(+), 21 deletions(-)
>  create mode 100644 drivers/cpufreq/imx7ulp-cpufreq.c
> 
> -- 
> 2.7.4
>