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References: <20240102-j7200-pcie-s2r-v2-0-8e4f7d228ec2@bootlin.com> <20240102-j7200-pcie-s2r-v2-6-8e4f7d228ec2@bootlin.com>
In-Reply-To: <20240102-j7200-pcie-s2r-v2-6-8e4f7d228ec2@bootlin.com>
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Fri, 26 Jan 2024 23:38:53 +0200
Message-ID: <CAHp75VcUY5_gB=VVWF2pAa4iEo_9Lt5itNH5RAy6NjnTk5PZWA@mail.gmail.com>
Subject: Re: [PATCH v2 06/15] phy: ti: phy-j721e-wiz: make wiz_clock_init
 callable multiple times
To: Thomas Richard <thomas.richard@bootlin.com>
Cc: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl>, 
	Andy Shevchenko <andy@kernel.org>, Tony Lindgren <tony@atomide.com>, 
	Haojian Zhuang <haojian.zhuang@linaro.org>, Vignesh R <vigneshr@ti.com>, 
	Aaro Koskinen <aaro.koskinen@iki.fi>, Janusz Krzysztofik <jmkrzyszt@gmail.com>, 
	Andi Shyti <andi.shyti@kernel.org>, Peter Rosin <peda@axentia.se>, Vinod Koul <vkoul@kernel.org>, 
	Kishon Vijay Abraham I <kishon@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, 
	Tom Joseph <tjoseph@cadence.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, 
	=?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>, 
	Rob Herring <robh@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>, linux-gpio@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
	linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, 
	linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, 
	gregory.clement@bootlin.com, theo.lebrun@bootlin.com, 
	thomas.petazzoni@bootlin.com, u-kumar1@ti.com
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On Fri, Jan 26, 2024 at 4:37=E2=80=AFPM Thomas Richard
<thomas.richard@bootlin.com> wrote:
>
> For suspend and resume support, wiz_clock_init needs to be called multipl=
e

wiz_clock_init()

> times.
>
> Add a parameter to wiz_clock_init to be able to skip clocks registration.

Ditto.

..to skip the registration of the clocks.

..

> -static int wiz_clock_init(struct wiz *wiz, struct device_node *node)
> +static int wiz_clock_init(struct wiz *wiz, struct device_node *node, boo=
l probe)

So, why not refactor this to two functions first?

..

> +               clk =3D devm_clk_get(dev, "core_ref_clk");
> +               if (IS_ERR(clk)) {

> +                       dev_err(dev, "core_ref_clk clock not found\n");
> +                       ret =3D PTR_ERR(clk);
> +                       return ret;

This is wrong and has to be fixed in the original code.
The correct approach is to use `return dev_err_probe(...)` or open
code it, but since we have a helper, open coding is highly
discouraged.

> +               }

..

> +               if (wiz->data->pma_cmn_refclk1_int_mode) {
> +                       clk =3D devm_clk_get(dev, "core_ref1_clk");
> +                       if (IS_ERR(clk)) {
> +                               dev_err(dev, "core_ref1_clk clock not fou=
nd\n");
> +                               ret =3D PTR_ERR(clk);
> +                               return ret;

Ditto.

> +                       }

..

> +               clk =3D devm_clk_get(dev, "ext_ref_clk");
> +               if (IS_ERR(clk)) {
> +                       dev_err(dev, "ext_ref_clk clock not found\n");
> +                       ret =3D PTR_ERR(clk);
> +                       return ret;

Ditto.

> +               }

..

> +       /* What follows is about registering clocks. */
> +       if (!probe)
> +               return 0;

Just refactor properly, no need to have this ugly mix of devm_*() for
probe stage, parameter and HW related things.

--=20
With Best Regards,
Andy Shevchenko