linux-kernel - Re: [PATCH 3/8] phy: rockchip-usb: move per-phy init into a separate function

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Date:	Wed, 4 Nov 2015 15:53:44 -0800
From:	Doug Anderson <dianders@...omium.org>
To:	Heiko Stuebner <heiko@...ech.de>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Romain Perier <romain.perier@...il.com>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 3/8] phy: rockchip-usb: move per-phy init into a separate function

Heiko,

On Wed, Nov 4, 2015 at 1:44 PM, Heiko Stuebner <heiko@...ech.de> wrote:
>         for_each_available_child_of_node(dev->of_node, child) {
> -               rk_phy = devm_kzalloc(dev, sizeof(*rk_phy), GFP_KERNEL);
> -               if (!rk_phy)
> -                       return -ENOMEM;
> -
> -               if (of_property_read_u32(child, "reg", &reg_offset)) {
> -                       dev_err(dev, "missing reg property in node %s\n",
> -                               child->name);
> -                       return -EINVAL;
> -               }
> -
> -               rk_phy->reg_offset = reg_offset;
> -
> -               rk_phy->clk = of_clk_get_by_name(child, "phyclk");
> -               if (IS_ERR(rk_phy->clk))
> -                       rk_phy->clk = NULL;
> -
> -               err = devm_add_action(dev, rockchip_usb_phy_action, rk_phy);
> -               if (err) {
> -                       if (rk_phy->clk)
> -                               clk_put(rk_phy->clk);
> -                       return err;
> -               }
> -
> -               rk_phy->phy = devm_phy_create(dev, child, &ops);
> -               if (IS_ERR(rk_phy->phy)) {
> -                       dev_err(dev, "failed to create PHY\n");
> -                       return PTR_ERR(rk_phy->phy);
> -               }
> -               phy_set_drvdata(rk_phy->phy, rk_phy);
> -
> -               /* only power up usb phy when it use, so disable it when init*/
> -               err = rockchip_usb_phy_power(rk_phy, 1);
> -               if (err)
> +               err = rockchip_usb_phy_init(phy_base, child);
> +               if (err < 0)
>                         return err;

You've also included the minor unrelated tweak to check for erorrs
with "err < 0" rather than "err" that has the incredibly small chance
to affect behavior, making this not a 100% noop change.

I don't personally care that much since it's terribly unlikely to
affect anything.  ...but you get a 1-line better diffstat if you don't
change it and it's unlikely to matter much either way...

Reviewed-by: Douglas Anderson <dianders@...omium.org>


-Doug
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