LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Rob Herring <robh@kernel.org>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: p.zabel@pengutronix.de, linux-kernel@vger.kernel.org,
	Mark Rutland <mark.rutland@arm.com>,
	Brian Norris <computersforpeace@gmail.com>,
	Gregory Fong <gregory.0xf0@gmail.com>,
	"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" 
	<bcm-kernel-feedback-list@broadcom.com>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>,
	"moderated list:BROADCOM BCM7XXX ARM ARCHITECTURE" 
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/2] dt-bindings: reset: Add document for Broadcom STB reset controller
Date: Thu, 3 Jan 2019 13:19:15 -0600
Message-ID: <20190103191915.GB6613@bogus> (raw)
In-Reply-To: <2a54c2cf-5595-ade5-fb29-40e8b6d3133e@gmail.com>

On Thu, Jan 03, 2019 at 10:53:25AM -0800, Florian Fainelli wrote:
> On 1/3/19 9:41 AM, Rob Herring wrote:
> > On Thu, Dec 20, 2018 at 05:34:08PM -0800, Florian Fainelli wrote:
> >> Add a binding document for the Broadcom STB reset controller, also known
> >> as SW_INIT-style reset controller.
> >>
> >> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> >> ---
> >>  .../devicetree/bindings/reset/brcm,reset.txt  | 27 +++++++++++++++++++
> >>  1 file changed, 27 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/reset/brcm,reset.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/reset/brcm,reset.txt b/Documentation/devicetree/bindings/reset/brcm,reset.txt
> >> new file mode 100644
> >> index 000000000000..6e5341b4f891
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/reset/brcm,reset.txt
> >> @@ -0,0 +1,27 @@
> >> +Broadcom STB SW_INIT-style reset controller
> >> +===========================================
> >> +
> >> +Broadcom STB SoCs have a SW_INIT-style reset controller with separate
> >> +SET/CLEAR/STATUS registers and possibly multiple banks, each of 32 bit
> >> +reset lines.
> >> +
> >> +Please also refer to reset.txt in this directory for common reset
> >> +controller binding usage.
> >> +
> >> +Required properties:
> >> +- compatible: should be brcm,brcmstb-reset
> >> +- reg: register base and length
> >> +- #reset-cells: must be set to 1
> >> +
> >> +Example:
> >> +
> >> +	reset: reset-controller@8404318 {
> >> +		compatible = "brcm,brcmstb-reset";
> >> +		reg = <0x8404318 0x30>;
> > 
> > Based on this address, should this be a sub-node of something else? Or 
> > not even a sub-node and just make the parent be a reset provider?
> 
> The reset controller is part of a larger "sundry" node which has a
> collection of functionality, from pinmux/pinctrl, reset controller,
> spare bits, chicken bits, anything the designers forgot to put somewhere
> else and decided to put there.
> 
> If there is one thing consistent though is that given a set of 32-bit
> register groups, they have a self contained functionality such that you
> can break up the larger "sundry" space into smaller sub-blocks which
> have one an only one functionality. Do you think this warrants a
> different representation in Device Tree?

With pinctrl in the mix, you're going to need sub-nodes anyways. So just 
define what this is a sub-node of.

Also, I'd prefer to have complete example for the "sundry" node and 
child nodes than partial examples spread across the tree.

Rob

  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-21  1:34 [PATCH 0/2] reset: Add Broadcom STB SW_INIT reset controller driver Florian Fainelli
2018-12-21  1:34 ` [PATCH 1/2] dt-bindings: reset: Add document for Broadcom STB reset controller Florian Fainelli
2018-12-31 23:13   ` Scott Branden
2019-01-02 20:38     ` Florian Fainelli
2019-01-03 17:41   ` Rob Herring
2019-01-03 18:53     ` Florian Fainelli
2019-01-03 19:19       ` Rob Herring [this message]
2019-01-03 19:31         ` Florian Fainelli
2019-01-03 22:54           ` Rob Herring
2019-01-11 18:51             ` Florian Fainelli
2018-12-21  1:34 ` [PATCH 2/2] reset: Add Broadcom STB SW_INIT reset controller driver Florian Fainelli
2019-01-02 10:44   ` Philipp Zabel
2019-01-02 20:38     ` Florian Fainelli

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190103191915.GB6613@bogus \
    --to=robh@kernel.org \
    --cc=bcm-kernel-feedback-list@broadcom.com \
    --cc=computersforpeace@gmail.com \
    --cc=devicetree@vger.kernel.org \
    --cc=f.fainelli@gmail.com \
    --cc=gregory.0xf0@gmail.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=p.zabel@pengutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org linux-kernel@archiver.kernel.org
	public-inbox-index lkml


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox