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Date: Wed, 12 Sep 2018 16:55:07 +0200
From: Jernej Škrabec <jernej.skrabec@...l.net>
To: Chen-Yu Tsai <wens@...e.org>
Cc: Rob Herring <robh+dt@...nel.org>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Mark Rutland <mark.rutland@....com>,
Mike Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
David Airlie <airlied@...ux.ie>,
Archit Taneja <architt@...eaurora.org>,
Andrzej Hajda <a.hajda@...sung.com>,
devicetree <devicetree@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-clk <linux-clk@...r.kernel.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
linux-sunxi <linux-sunxi@...glegroups.com>,
Icenowy Zheng <icenowy@...c.io>
Subject: Re: [PATCH 08/27] clk: sunxi-ng: Add support for H6 DE3 clocks
Dne sreda, 12. september 2018 ob 14:20:08 CEST je Chen-Yu Tsai napisal(a):
> On Wed, Sep 5, 2018 at 1:46 AM Jernej Škrabec <jernej.skrabec@...l.net>
wrote:
> > 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@...l.net>
> >
> > wrote:
> > > > Support for mixer0, mixer1, writeback and rotation units is added.
> > > >
> > > > Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> > > > Signed-off-by: Icenowy Zheng <icenowy@...c.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.
>
> Then maybe have macros for both cases instead?
> CLK_NUMBER_WITH_ROT / CLK_NUMBER_WITHOUT_ROT?
That sounds reasonable. Do you want separate patch which renames original
macro CLK_NUMBER to CLK_NUMBER_WITHOUT_ROT?
Best regards,
Jernej
>
> ChenYu
>
> > 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
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