linux-kernel - Re: [PATCH v8 04/16] clk: npcm8xx: add clock controller

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Message-Id: <20220809180228.22D78C433D7@smtp.kernel.org>
Date:   Tue, 09 Aug 2022 11:02:26 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Tomer Maimon <tmaimon77@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Avi Fishman <avifishman70@...il.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Greg KH <gregkh@...uxfoundation.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Jiri Slaby <jirislaby@...nel.org>,
        Joel Stanley <joel@....id.au>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Lubomir Rintel <lkundrak@...sk>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Michael Turquette <mturquette@...libre.com>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>,
        Olof Johansson <olof@...om.net>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Robert Hancock <robert.hancock@...ian.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Tali Perry <tali.perry1@...il.com>,
        Thomas G leixner <tglx@...utronix.de>,
        Patrick Venture <venture@...gle.com>,
        Vinod Koul <vkoul@...nel.org>, Will Deacon <will@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Nancy Yuen <yuenn@...gle.com>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        SERIAL DRIVERS <linux-serial@...r.kernel.org>,
        LINUXWATCHDOG <linux-watchdog@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v8 04/16] clk: npcm8xx: add clock controller

Quoting Tomer Maimon (2022-08-08 06:08:08)
> On Mon, 8 Aug 2022 at 15:37, Tomer Maimon <tmaimon77@...il.com> wrote:
> > > Using platform APIs means using platform_*() functions, not of_*()
> > > functions, which are open-firmware/DT related. Regmap can be used to
> > > operate on registers mapped as __iomem, which is different from platform
> > > APIs.
> > I will use platform_get_resource() and devm_ioremap_resource()
> > functions in the next version.
> I will use platform_get_resource() and ioremap() function next
> veriosn, is it fine?

As stated earlier it will work for now but eventually you'll get patches
from janitors trying to convert to a devm based API that reserves the
register region. Can you ioremap the register once and register an
auxiliary device and driver for the reset (or clk) part so that the
driver can be moved out to the drivers/reset/ path?