linux-kernel - Re: [linux-sunxi] Re: [PATCH 02/21] arm64: dts: allwinner: a64: Add DE2 CCU

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Message-ID: <918A5AB7-E83F-40BD-9C4C-772230F798CF@aosc.io>
Date:   Wed, 02 May 2018 19:55:25 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     linux-arm-kernel@...ts.infradead.org,
        Jagan Teki <jagannadh.teki@...il.com>
CC:     Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Michael Turquette <mturquette@...libre.com>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Will Deacon <will.deacon@....com>,
        Stephen Boyd <sboyd@...nel.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh+dt@...nel.org>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-clk@...r.kernel.org
Subject: Re: [linux-sunxi] Re: [PATCH 02/21] arm64: dts: allwinner: a64: Add DE2 CCU

于 2018年5月2日 GMT+08:00 下午7:50:19, Jagan Teki <jagannadh.teki@...il.com> 写到:
>On Wed, May 2, 2018 at 5:04 PM, Icenowy Zheng <icenowy@...c.io> wrote:
>>
>>
>> 于 2018年5月2日 GMT+08:00 下午7:32:50, Maxime Ripard
><maxime.ripard@...tlin.com> 写到:
>>>On Mon, Apr 30, 2018 at 05:10:39PM +0530, Jagan Teki wrote:
>>>> DE2 in A64 has clock control unit and behavior is
>>>> same like H3/H5, so reuse the same in A64.
>>>>
>>>> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
>>>> ---
>>>>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 15 +++++++++++++++
>>>>  1 file changed, 15 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> index 1b2ef28c42bd..67b80bbe5bf5 100644
>>>> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
>>>> @@ -43,9 +43,11 @@
>>>>   */
>>>>
>>>>  #include <dt-bindings/clock/sun50i-a64-ccu.h>
>>>> +#include <dt-bindings/clock/sun8i-de2.h>
>>>>  #include <dt-bindings/clock/sun8i-r-ccu.h>
>>>>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>>>>  #include <dt-bindings/reset/sun50i-a64-ccu.h>
>>>> +#include <dt-bindings/reset/sun8i-de2.h>
>>>>
>>>>  / {
>>>>      interrupt-parent = <&gic>;
>>>> @@ -168,6 +170,19 @@
>>>>              #size-cells = <1>;
>>>>              ranges;
>>>>
>>>> +            display_clocks: clock@...0000 {
>>>> +                    compatible = "allwinner,sun50i-a64-de2-clk",
>>>> +                                 "allwinner,sun50i-h5-de2-clk";
>>>
>>>The A64 was released before the H5, so that should be the other way
>>>around.
>>>
>>>> +                    reg = <0x01000000 0x100000>;
>>>> +                    clocks = <&ccu CLK_DE>,
>>>> +                             <&ccu CLK_BUS_DE>;
>>>> +                    clock-names = "mod",
>>>> +                                  "bus";
>>>> +                    resets = <&ccu RST_BUS_DE>;
>>>> +                    #clock-cells = <1>;
>>>> +                    #reset-cells = <1>;
>>>> +            };
>>>> +
>>>
>>>So it turns out we don't need the SRAM to access the CCU driver?
>>
>> As now U-Boot claims SRAM, people may forget thus :-(
>
>I've sent few mails about how we represent de2 with sram_c [1] but
>none response after. Can I get further inputs so-that we can include
>sram_c in proper manner.

Please wait for the SRAMC driver sent by Chen-Yu (and commited
by me) and the DE2 bus driver pending for the SRAMC part.

>
>[1] https://patchwork.kernel.org/patch/10289737/
>
>Jagan.
>
>_______________________________________________
>linux-arm-kernel mailing list
>linux-arm-kernel@...ts.infradead.org
>http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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