linux-kernel - Re: [RFC PATCH 3/3] clk: lan966x: Extend lan966x clock driver for clock gating support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20211029093556.tdvroyommqi5xb6g@soft-dev3-1.localhost>
Date:   Fri, 29 Oct 2021 11:35:56 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Stephen Boyd <sboyd@...nel.org>
CC:     <mturquette@...libre.com>, <robh+dt@...nel.org>,
        <nicolas.ferre@...rochip.com>, <kavyasree.kotagiri@...rochip.com>,
        <eugen.hristev@...rochip.com>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 3/3] clk: lan966x: Extend lan966x clock driver for
 clock gating support

The 10/28/2021 23:41, Stephen Boyd wrote:

Hi Stephen,

> 
> Quoting Horatiu Vultur (2021-10-19 01:44:49)
> > diff --git a/drivers/clk/clk-lan966x.c b/drivers/clk/clk-lan966x.c
> > index 19bec94e1551..40be47092a31 100644
> > --- a/drivers/clk/clk-lan966x.c
> > +++ b/drivers/clk/clk-lan966x.c
> > @@ -188,26 +202,64 @@ static struct clk_hw *lan966x_gck_clk_register(struct device *dev, int i)
> >         return &priv->hw;
> >  };
> >
> > +static int lan966x_gate_clk_register(struct device *dev,
> > +                                    struct clk_hw_onecell_data *hw_data,
> > +                                    void __iomem *gate_base)
> > +{
> > +       int i;
> > +
> > +       for (i = GCK_GATE_UHPHS; i < N_CLOCKS; ++i) {
> > +               int idx = i - GCK_GATE_UHPHS;
> > +
> > +               hw_data->hws[i] =
> > +                       clk_hw_register_gate(dev, clk_gate_desc[idx].name,
> 
> Use devm?

I couldn't find any devm_clk_hw_register_gate or something similar for
the gate.

> 
> > +                                            "lan966x", 0, base,
> > +                                            clk_gate_desc[idx].bit_idx,
> > +                                            0, &clk_gate_lock);
> > +
> > +               if (IS_ERR(hw_data->hws[i]))
> > +                       return dev_err_probe(dev, PTR_ERR(hw_data->hws[i]),
> > +                                            "failed to register %s clock\n",
> > +                                            clk_gate_desc[idx].name);
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +static void lan966x_gate_clk_unregister(struct clk_hw_onecell_data *hw_data)
> > +{
> > +       int i;
> > +
> > +       for (i = GCK_GATE_UHPHS; i < N_CLOCKS; ++i)
> 
> for (int i =
> 
> should suffice

That would not work. I will get the error:
error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode

> 
> > +               if (!IS_ERR(hw_data->hws[i]))
> > +                       clk_hw_unregister(hw_data->hws[i]);
> > +}
> > +

-- 
/Horatiu