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From:   Jernej =?utf-8?B?xaBrcmFiZWM=?= <jernej.skrabec@siol.net>
To:     Chen-Yu Tsai <wens@csie.org>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Mike Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        David Airlie <airlied@linux.ie>,
        Archit Taneja <architt@codeaurora.org>,
        Andrzej Hajda <a.hajda@samsung.com>,
        devicetree <devicetree@vger.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        linux-clk <linux-clk@vger.kernel.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        linux-sunxi <linux-sunxi@googlegroups.com>,
        Icenowy Zheng <icenowy@aosc.io>
Subject: Re: [PATCH 08/27] clk: sunxi-ng: Add support for H6 DE3 clocks
Date:   Tue, 04 Sep 2018 19:45:59 +0200
Message-ID: <1677668.BePkXd9qNa@jernej-laptop>
In-Reply-To: <CAGb2v66y1iVDknM0uQKbHQFoWn7RveTky8jZO=_2iDqL=bJd-w@mail.gmail.com>
References: <20180902072643.4917-1-jernej.skrabec@siol.net> <20180902072643.4917-9-jernej.skrabec@siol.net> <CAGb2v66y1iVDknM0uQKbHQFoWn7RveTky8jZO=_2iDqL=bJd-w@mail.gmail.com>
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Dne torek, 04. september 2018 ob 11:04:21 CEST je Chen-Yu Tsai napisal(a):
> On Sun, Sep 2, 2018 at 3:27 PM Jernej Skrabec <jernej.skrabec@siol.net> 
wrote:
> > Support for mixer0, mixer1, writeback and rotation units is added.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> > ---
> > 
> >  drivers/clk/sunxi-ng/ccu-sun8i-de2.c | 65 ++++++++++++++++++++++++++++
> >  drivers/clk/sunxi-ng/ccu-sun8i-de2.h |  1 +
> >  2 files changed, 66 insertions(+)
> > 
> > diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
> > b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c index bae5ee67a797..4535c1c27d27
> > 100644
> > --- a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
> > +++ b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
> > @@ -31,6 +31,8 @@ static SUNXI_CCU_GATE(bus_mixer1_clk, "bus-mixer1",  
> > "bus-de",> 
> >                       0x04, BIT(1), 0);
> >  
> >  static SUNXI_CCU_GATE(bus_wb_clk,      "bus-wb",       "bus-de",
> >  
> >                       0x04, BIT(2), 0);
> > 
> > +static SUNXI_CCU_GATE(bus_rot_clk,     "bus-rot",      "bus-de",
> > +                     0x04, BIT(3), 0);
> > 
> >  static SUNXI_CCU_GATE(mixer0_clk,      "mixer0",       "mixer0-div",
> >  
> >                       0x00, BIT(0), CLK_SET_RATE_PARENT);
> > 
> > @@ -38,6 +40,8 @@ static SUNXI_CCU_GATE(mixer1_clk,     "mixer1",      
> > "mixer1-div",> 
> >                       0x00, BIT(1), CLK_SET_RATE_PARENT);
> >  
> >  static SUNXI_CCU_GATE(wb_clk,          "wb",           "wb-div",
> >  
> >                       0x00, BIT(2), CLK_SET_RATE_PARENT);
> > 
> > +static SUNXI_CCU_GATE(rot_clk,         "rot",          "rot-div",
> > +                     0x00, BIT(3), CLK_SET_RATE_PARENT);
> > 
> >  static SUNXI_CCU_M(mixer0_div_clk, "mixer0-div", "de", 0x0c, 0, 4,
> >  
> >                    CLK_SET_RATE_PARENT);
> > 
> > @@ -45,6 +49,8 @@ static SUNXI_CCU_M(mixer1_div_clk, "mixer1-div", "de",
> > 0x0c, 4, 4,> 
> >                    CLK_SET_RATE_PARENT);
> >  
> >  static SUNXI_CCU_M(wb_div_clk, "wb-div", "de", 0x0c, 8, 4,
> >  
> >                    CLK_SET_RATE_PARENT);
> > 
> > +static SUNXI_CCU_M(rot_div_clk, "rot-div", "de", 0x0c, 0x0c, 4,
> > +                  CLK_SET_RATE_PARENT);
> > 
> >  static SUNXI_CCU_M(mixer0_div_a83_clk, "mixer0-div", "pll-de", 0x0c, 0,
> >  4,
> >  
> >                    CLK_SET_RATE_PARENT);
> > 
> > @@ -53,6 +59,24 @@ static SUNXI_CCU_M(mixer1_div_a83_clk, "mixer1-div",
> > "pll-de", 0x0c, 4, 4,> 
> >  static SUNXI_CCU_M(wb_div_a83_clk, "wb-div", "pll-de", 0x0c, 8, 4,
> >  
> >                    CLK_SET_RATE_PARENT);
> > 
> > +static struct ccu_common *sun50i_h6_de3_clks[] = {
> > +       &mixer0_clk.common,
> > +       &mixer1_clk.common,
> > +       &wb_clk.common,
> > +
> > +       &bus_mixer0_clk.common,
> > +       &bus_mixer1_clk.common,
> > +       &bus_wb_clk.common,
> > +
> > +       &mixer0_div_clk.common,
> > +       &mixer1_div_clk.common,
> > +       &wb_div_clk.common,
> > +
> > +       &bus_rot_clk.common,
> > +       &rot_clk.common,
> > +       &rot_div_clk.common,
> > +};
> > +
> > 
> >  static struct ccu_common *sun8i_a83t_de2_clks[] = {
> >  
> >         &mixer0_clk.common,
> >         &mixer1_clk.common,
> > 
> > @@ -92,6 +116,26 @@ static struct ccu_common *sun8i_v3s_de2_clks[] = {
> > 
> >         &wb_div_clk.common,
> >  
> >  };
> > 
> > +static struct clk_hw_onecell_data sun50i_h6_de3_hw_clks = {
> > +       .hws    = {
> > +               [CLK_MIXER0]            = &mixer0_clk.common.hw,
> > +               [CLK_MIXER1]            = &mixer1_clk.common.hw,
> > +               [CLK_WB]                = &wb_clk.common.hw,
> > +               [CLK_ROT]               = &rot_clk.common.hw,
> > +
> > +               [CLK_BUS_MIXER0]        = &bus_mixer0_clk.common.hw,
> > +               [CLK_BUS_MIXER1]        = &bus_mixer1_clk.common.hw,
> > +               [CLK_BUS_WB]            = &bus_wb_clk.common.hw,
> > +               [CLK_BUS_ROT]           = &bus_rot_clk.common.hw,
> > +
> > +               [CLK_MIXER0_DIV]        = &mixer0_div_clk.common.hw,
> > +               [CLK_MIXER1_DIV]        = &mixer1_div_clk.common.hw,
> > +               [CLK_WB_DIV]            = &wb_div_clk.common.hw,
> > +               [CLK_ROT_DIV]           = &rot_div_clk.common.hw,
> > +       },
> > +       .num    = 12,
> 
> It's best not to openly code these. It is error prone, like having
> an index beyond .num, which then never gets registered.
> 
> Instead, please update CLK_NUMBERS and use that instead. sunxi_ccu_probe()
> can handle holes in .hws.

I'm not sure this will work. All newly introduced indices are at the end, so 
other arrays will still have same length (hole at the end). You will just 
claim that arrays are larger than they really are, which means bad things.

But I take any other suggestion. I really can't think of better solution.

Best regards,
Jernej

> 
> On the other hand, it can't handle holes in the ccu_reset_map. Hope we
> never have to deal with such an instance.
> 
> ChenYu
> 
> > +};
> > +
> > 
> >  static struct clk_hw_onecell_data sun8i_a83t_de2_hw_clks = {
> >  
> >         .hws    = {
> >         
> >                 [CLK_MIXER0]            = &mixer0_clk.common.hw,
> > 
> > @@ -156,6 +200,13 @@ static struct ccu_reset_map sun50i_a64_de2_resets[] =
> > {> 
> >         [RST_WB]        = { 0x08, BIT(2) },
> >  
> >  };
> > 
> > +static struct ccu_reset_map sun50i_h6_de3_resets[] = {
> > +       [RST_MIXER0]    = { 0x08, BIT(0) },
> > +       [RST_MIXER1]    = { 0x08, BIT(1) },
> > +       [RST_WB]        = { 0x08, BIT(2) },
> > +       [RST_ROT]       = { 0x08, BIT(3) },
> > +};
> > +
> > 
> >  static const struct sunxi_ccu_desc sun8i_a83t_de2_clk_desc = {
> >  
> >         .ccu_clks       = sun8i_a83t_de2_clks,
> >         .num_ccu_clks   = ARRAY_SIZE(sun8i_a83t_de2_clks),
> > 
> > @@ -186,6 +237,16 @@ static const struct sunxi_ccu_desc
> > sun50i_a64_de2_clk_desc = {> 
> >         .num_resets     = ARRAY_SIZE(sun50i_a64_de2_resets),
> >  
> >  };
> > 
> > +static const struct sunxi_ccu_desc sun50i_h6_de3_clk_desc = {
> > +       .ccu_clks       = sun50i_h6_de3_clks,
> > +       .num_ccu_clks   = ARRAY_SIZE(sun50i_h6_de3_clks),
> > +
> > +       .hw_clks        = &sun50i_h6_de3_hw_clks,
> > +
> > +       .resets         = sun50i_h6_de3_resets,
> > +       .num_resets     = ARRAY_SIZE(sun50i_h6_de3_resets),
> > +};
> > +
> > 
> >  static const struct sunxi_ccu_desc sun8i_v3s_de2_clk_desc = {
> >  
> >         .ccu_clks       = sun8i_v3s_de2_clks,
> >         .num_ccu_clks   = ARRAY_SIZE(sun8i_v3s_de2_clks),
> > 
> > @@ -296,6 +357,10 @@ static const struct of_device_id sunxi_de2_clk_ids[]
> > = {> 
> >                 .compatible = "allwinner,sun50i-h5-de2-clk",
> >                 .data = &sun50i_a64_de2_clk_desc,
> >         
> >         },
> > 
> > +       {
> > +               .compatible = "allwinner,sun50i-h6-de3-clk",
> > +               .data = &sun50i_h6_de3_clk_desc,
> > +       },
> > 
> >         { }
> >  
> >  };
> > 
> > diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-de2.h
> > b/drivers/clk/sunxi-ng/ccu-sun8i-de2.h index 530c006e0ae9..27bd88539f42
> > 100644
> > --- a/drivers/clk/sunxi-ng/ccu-sun8i-de2.h
> > +++ b/drivers/clk/sunxi-ng/ccu-sun8i-de2.h
> > @@ -22,6 +22,7 @@
> > 
> >  #define CLK_MIXER0_DIV 3
> >  #define CLK_MIXER1_DIV 4
> >  #define CLK_WB_DIV     5
> > 
> > +#define CLK_ROT_DIV    11
> > 
> >  #define CLK_NUMBER     (CLK_WB + 1)
> > 
> > --
> > 2.18.0