linux-kernel - Re: [PATCH 3/3] clk: meson-g12a: Add EE Clock controller driver

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Date:   Wed, 11 Jul 2018 15:45:52 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Jian Hu <jian.hu@...ogic.com>, Yixun Lan <yixun.lan@...ogic.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        qianggui.song@...ogic.com, sboyd@...nel.org, khilman@...libre.com,
        mturquette@...libre.com, linux-kernel@...r.kernel.org,
        bo.yang@...ogic.com, qiufang.dai@...ogic.com,
        linux-arm-kernel@...ts.infradead.org, carlo@...one.org,
        linux-amlogic@...ts.infradead.org, sunny.luo@...ogic.com,
        linux-clk@...r.kernel.org, xingyu.chen@...ogic.com,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH 3/3] clk: meson-g12a: Add EE Clock controller driver

On Wed, 2018-07-11 at 21:41 +0800, Jian Hu wrote:
> > > > > +static struct clk_regmap g12a_mpll0 = {
> > > > > +       .data = &(struct clk_regmap_gate_data){
> > > > > +               .offset = HHI_MPLL_CNTL1,
> > > > > +               .bit_idx = 31,
> > > > > +       },
> > > > > +       .hw.init = &(struct clk_init_data){
> > > > > +               .name = "mpll0",
> > > > > +               .ops = &clk_regmap_gate_ops,
> > > > > +               .parent_names = (const char *[]){ "mpll0_div" },
> > > > > +               .num_parents = 1,
> > > > > +               .flags = CLK_SET_RATE_PARENT,
> > > > > +       },
> > > > > +};
> > 
> > The previous had a predivider (1 or 2) in front of these mpll. Even if the
> > predivider is usually set to be a passthrough, it is better to model the tree
> > correctly.
> > 
> > Is this SoC any different ?
> > 
> 
> I am not sure the difference, I will confirm with IC design guys.

I suggest that you have a look at the (upstream) axg and gxbb clock driver for
this

Same goes for the fdiv gates.

Last, please trim your replies a bit. It will make easier to see what you are
replying to.