linux-kernel - Re: [PATCH v7 0/7] Add PLL clocks driver and syscon for StarFive JH7110 SoC

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Date:   Mon, 17 Jul 2023 19:14:16 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Xingyu Wu <xingyu.wu@...rfivetech.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...rfivetech.com>,
        William Qiu <william.qiu@...rfivetech.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v7 0/7] Add PLL clocks driver and syscon for StarFive
 JH7110 SoC

Hey Xingyu,

On Mon, Jul 17, 2023 at 10:30:33AM +0800, Xingyu Wu wrote:
> This patch serises are to add PLL clocks driver and providers by writing
> and reading syscon registers for the StarFive JH7110 RISC-V SoC. And add 
> documentation and nodes to describe StarFive System Controller(syscon)
> Registers. This patch serises are based on Linux 6.4.
> 
> PLLs are high speed, low jitter frequency synthesizers in JH7110.
> Each PLL clock works in integer mode or fraction mode by some dividers,
> and the dividers are set in several syscon registers.
> The formula for calculating frequency is: 
> Fvco = Fref * (NI + NF) / M / Q1
> 
> The first patch adds docunmentation to describe PLL clock bindings,
> and the second patch adds documentation to decribe syscon registers.
> The patch 3 modifies the SYSCRG bindings and adds PLL clock inputs.
> The patch 4 adds driver to support PLL clocks for JH7110.
> The patch 5 modifies the system clock driver and can select the PLL clock
> source from PLL clocks driver. And the patch 6 adds the 
> stg/sys/aon syscon nodes for JH7110 SoC. The last patch modifies the 
> syscrg node in JH7110 dts file.

Just FYI, I have picked up the binding & clock portions of this series
and your other one adding the stg syscon. I've pushed them out here for
the test robots to have a look:
https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/log/?h=clk-starfive

If that passes, my plan is to send Stephen a PR for the lot, later this
week.

Thanks,
Conor.

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