linux-kernel - Re: [PATCH v4 2/6] dt: bindings: add mt7621-clk device tree binding documentation

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Message-ID: <CAMhs-H_Zu-yvbcajPYm=AfVo915dM6_3kBf9wpN4rt3LZ6LXpw@mail.gmail.com>
Date:   Thu, 17 Dec 2020 11:54:17 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        John Crispin <john@...ozen.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Chuanhong Guo <gch981213@...il.com>,
        Weijie Gao <hackpascal@...il.com>,
        COMMON CLK FRAMEWORK <linux-clk@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:MIPS <linux-mips@...r.kernel.org>, open list:STAGING
        SUBSYSTEM <devel@...verdev.osuosl.org>, NeilBrown <neil@...wn.name>,
        open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 2/6] dt: bindings: add mt7621-clk device tree binding documentation

On Thu, Dec 17, 2020 at 11:50 AM Stephen Boyd <sboyd@...nel.org> wrote:
>
> Quoting Sergio Paracuellos (2020-12-17 02:38:37)
> > On Thu, Dec 17, 2020 at 11:32 AM Stephen Boyd <sboyd@...nel.org> wrote:
> > >
> > > Quoting Sergio Paracuellos (2020-12-17 02:14:10)
> > > > node is to use architecture operations in
> > > > 'arch/mips/include/asm/mach-ralink/ralink_regs.h'
> > > > instead of getting a phandle using the regmap is being currently used...
> > >
> > > Can that be done with
> > >
> > > CLK_OF_DECLARE_DRIVER("mediatek,mt7621-sysc", my_timer_clk_init)
> > >
> > > ? Is the syscon used anywhere besides by the clk driver?
> >
> > Yes, for example all the gates use them to access SYSC_REG_CLKCFG1 in
> > all of their 'mt7621_gate_ops' and also in all 'recalc_rate' functions
> > where SYSC_REG_SYSTEM_CONFIG0, is readed.
>
> That sounds like it's only used by the clk provider/driver? Any other
> code uses the syscon?

The only child node for the syscon for this platform is the clock
driver now, I introduced it in this series, so no other driver is
using this syscon now. All of them use global arch operations in
'arch/mips/include/asm/mach-ralink/ralink_regs.h'.