From: Florian Fainelli <f.fainelli@gmail.com>
To: Rob Herring <robh@kernel.org>, Florian Fainelli <f.fainelli@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
p.zabel@pengutronix.de, linux-kernel@vger.kernel.org,
"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
<bcm-kernel-feedback-list@broadcom.com>,
Gregory Fong <gregory.0xf0@gmail.com>,
Brian Norris <computersforpeace@gmail.com>,
"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 10:53:25 -0800 [thread overview]
Message-ID: <2a54c2cf-5595-ade5-fb29-40e8b6d3133e@gmail.com> (raw)
In-Reply-To: <20190103174117.GA6613@bogus>
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?
--
Florian
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next prev parent reply other threads:[~2019-01-03 18:53 UTC|newest]
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 [this message]
2019-01-03 19:19 ` Rob Herring
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
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