From: Steen Hegelund <steen.hegelund@microchip.com>
To: Rob Herring <robh@kernel.org>
Cc: Andrew Lunn <andrew@lunn.ch>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
devicetree@vger.kernel.org,
Gregory Clement <gregory.clement@bootlin.com>,
linux-kernel@vger.kernel.org,
Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 3/3] arm64: dts: reset: add microchip sparx5 switch reset driver
Date: Mon, 8 Feb 2021 08:58:40 +0100 [thread overview]
Message-ID: <c92626b109dacc133a38036bfdea8876b8963603.camel@microchip.com> (raw)
In-Reply-To: <20210205223526.GA3869001@robh.at.kernel.org>
Hi Rob,
On Fri, 2021-02-05 at 16:35 -0600, Rob Herring wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
> know the content is safe
>
> On Wed, Jan 20, 2021 at 09:19:21AM +0100, Steen Hegelund wrote:
> > This provides reset driver support for the Microchip Sparx5 PCB134
> > and
> > PCB135 reference boards.
>
> This isn't a compatible change. You need an explanation why that's
> okay
> if that's intended.
>
> >
> > Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
> > ---
> > arch/arm64/boot/dts/microchip/sparx5.dtsi | 14 +++++++++++---
> > 1 file changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > b/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > index 380281f312d8..4edbb9fcdce0 100644
> > --- a/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > +++ b/arch/arm64/boot/dts/microchip/sparx5.dtsi
> > @@ -132,9 +132,17 @@ mux: mux-controller {
> > };
> > };
> >
> > - reset@611010008 {
> > - compatible = "microchip,sparx5-chip-reset";
> > - reg = <0x6 0x11010008 0x4>;
> > + gcb_ctrl: syscon@611010000 {
> > + compatible = "microchip,sparx5-gcb-syscon",
> > "syscon";
> > + reg = <0x6 0x11010000 0x10000>;
> > + };
> > +
> > + reset: reset-controller@0 {
> > + compatible = "microchip,sparx5-switch-reset";
> > + reg = <0x6 0x0 0x0>;
>
> Your register length is 0?
Yes, I only use the syscons.
>
> > + #reset-cells = <1>;
> > + cpu-syscon = <&cpu_ctrl>;
>
> Can't you accomplish the same thing adding these to
> "microchip,sparx5-chip-reset"? Or possibly as a child node.
>
> Define nodes based on h/w blocks, not as containers of things you
> happen
> to want for some driver.
Yes - I think the idea of using syscons came from another reset driver,
but it probably makes more sense to just use IO ranges directly.
I will try that out.
>
> > + gcb-syscon = <&gcb_ctrl>;
> > };
> >
> > uart0: serial@600100000 {
> > --
> > 2.29.2
> >
Thanks for your comments
BR
Steen
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next prev parent reply other threads:[~2021-02-08 8:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 8:19 [PATCH v4 0/3] Adding the Sparx5 Switch Reset Driver Steen Hegelund
2021-01-20 8:19 ` [PATCH v4 1/3] dt-bindings: reset: microchip sparx5 reset driver bindings Steen Hegelund
2021-01-20 8:19 ` [PATCH v4 2/3] reset: mchp: sparx5: add switch reset driver Steen Hegelund
2021-01-20 8:19 ` [PATCH v4 3/3] arm64: dts: reset: add microchip sparx5 " Steen Hegelund
2021-02-05 22:35 ` Rob Herring
2021-02-08 7:58 ` Steen Hegelund [this message]
2021-02-08 13:20 ` Steen Hegelund
2021-02-08 17:00 ` Rob Herring
2021-02-03 8:02 ` [PATCH v4 0/3] Adding the Sparx5 Switch Reset Driver Steen Hegelund
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