linux-kernel - Re: [PATCH v8 2/2] clk: wpcm450: Add Nuvoton WPCM450 clock/reset controller driver

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Date:   Tue, 01 Aug 2023 12:14:48 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jonathan Neuschäfer <j.neuschaefer@....net>
Cc:     Jonathan Neuschäfer <j.neuschaefer@....net>,
        linux-clk@...r.kernel.org, openbmc@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Joel Stanley <joel@....id.au>
Subject: Re: [PATCH v8 2/2] clk: wpcm450: Add Nuvoton WPCM450 clock/reset controller driver

Quoting Jonathan Neuschäfer (2023-07-22 08:15:43)
> On Thu, Jul 20, 2023 at 05:02:15PM -0700, Stephen Boyd wrote:
> > Quoting Jonathan Neuschäfer (2023-04-28 12:02:26)
> > > diff --git a/drivers/clk/clk-wpcm450.c b/drivers/clk/clk-wpcm450.c
> [...]
> > > +static unsigned long wpcm450_clk_pll_recalc_rate(struct clk_hw *hw,
> > > +                                                unsigned long parent_rate)
> > > +{
> > > +       struct wpcm450_clk_pll *pll = to_wpcm450_clk_pll(hw);
[...]
> 
> > > +static const struct wpcm450_pll_data pll_data[] = {
> > > +       { "pll0", { .name = "ref" }, REG_PLLCON0, 0 },
> > 
> > This is new code, please don't use .name. Instead use .fw_name or .index with preference to
> > .index first and .hw if the pointer is available in this driver.
> 
> As far as I can see, .fw_name and .index depend on a struct device*
> being passed to clk_hw_register, which won't be available unless I
> actually convert the driver to a platform driver.

You can call of_clk_hw_register(), but a conversion to a platform driver
is preferred.

> 
> Not relying on .name would indeed be nice.

Cool.