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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Michel Pollet <michel.pollet@bp.renesas.com>
Cc: Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	Simon Horman <horms@verge.net.au>,
	Phil Edworthy <phil.edworthy@renesas.com>,
	Michel Pollet <buserror+upstream@gmail.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	linux-clk <linux-clk@vger.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 2/5] dt-bindings: clock: renesas,r9a06g032-sysctrl: documentation
Date: Fri, 25 May 2018 11:23:48 +0200	[thread overview]
Message-ID: <CAMuHMdUb4fWFB9oP41ejO0_FDxmgBPL0GxQnkFv18Zfb5=1-fw@mail.gmail.com> (raw)
In-Reply-To: <1527154169-32380-3-git-send-email-michel.pollet@bp.renesas.com>

Hi Michel,

On Thu, May 24, 2018 at 11:28 AM, Michel Pollet
<michel.pollet@bp.renesas.com> wrote:
> The Renesas R9A06G032 SYSCTRL node description.
>
> Signed-off-by: Michel Pollet <michel.pollet@bp.renesas.com>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt
> @@ -0,0 +1,32 @@
> +* Renesas R9A06G032 SYSCTRL
> +
> +Required Properties:
> +
> +  - compatible: Must be:
> +    - "renesas,r9a06g032-sysctrl"
> +  - reg: Base address and length of the SYSCTRL IO block.
> +  - #clock-cells: Must be 1

No clocks/clock-names for the external clock inputs?

"RZ/N1 has 3 clock sources, 1 reference clock inputs for RGMII, and 2
 reference clock outputs for RMII/MII."

Given the documentation explicitly mentions the module clocks are to be
used for power-management, you may want to add #power-domain-cells as well,
and let the driver register clock domain. But that can be added later
(although it will break backwards compatibility with old DTBs).

As PWRCTRL_* registers allow to reset individual modules, #reset-cells is
another thing to add later.  It's good to start thinking early about how to
reference resets, though.
E.g. on other Renesas-SoCs, module resets uses the same numerical
references as module clocks.


> +
> +Examples
> +--------
> +
> +  - SYSCTRL node:
> +
> +       sysctrl: sysctrl@4000c000 {

system-controller@

> +               compatible = "renesas,r9a06g032-sysctrl";
> +               reg = <0x4000c000 0x1000>;
> +               #clock-cells = <1>;
> +       };

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

  reply	other threads:[~2018-05-25  9:23 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-24  9:28 [PATCH v7 0/5] arm: Base support for Renesas RZN1D-DB Board Michel Pollet
2018-05-24  9:28 ` [PATCH v7 1/5] dt-bindings: Add the r9a06g032-sysctrl.h file Michel Pollet
2018-05-25 10:31   ` Geert Uytterhoeven
2018-05-31  9:11     ` M P
2018-05-31  9:32       ` Geert Uytterhoeven
2018-05-31 10:01         ` M P
2018-06-01  8:18           ` Geert Uytterhoeven
2018-05-24  9:28 ` [PATCH v7 2/5] dt-bindings: clock: renesas,r9a06g032-sysctrl: documentation Michel Pollet
2018-05-25  9:23   ` Geert Uytterhoeven [this message]
2018-05-31 10:16     ` M P
2018-06-01  8:22       ` Geert Uytterhoeven
2018-05-24  9:28 ` [PATCH v7 3/5] ARM: dts: Renesas R9A06G032 base device tree file Michel Pollet
2018-05-25  9:27   ` Geert Uytterhoeven
2018-05-28  9:15     ` Simon Horman
2018-05-24  9:28 ` [PATCH v7 4/5] ARM: dts: Renesas RZN1D-DB Board base file Michel Pollet
2018-05-25  9:28   ` Geert Uytterhoeven
2018-05-24  9:28 ` [PATCH v7 5/5] clk: renesas: Renesas R9A06G032 clock driver Michel Pollet
2018-05-26 13:45   ` kbuild test robot
2018-05-30 19:49   ` Geert Uytterhoeven

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