linux-kernel - Re: [PATCH 2/4] dt-bindings: pinctrl: Document optional BCM7211 wake-up interrupts

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Date:   Fri, 29 May 2020 12:36:27 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Rob Herring <robh@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        "maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE..." 
        <bcm-kernel-feedback-list@...adcom.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        "open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/4] dt-bindings: pinctrl: Document optional BCM7211
 wake-up interrupts

On 5/29/20 12:33 PM, Rob Herring wrote:
> On Thu, May 28, 2020 at 12:21:10PM -0700, Florian Fainelli wrote:
>> BCM7211 supports wake-up interrupts in the form of optional interrupt
>> lines, one per bank, plus the "all banks" interrupt line.
>>
>> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
>> ---
>>  .../devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt         | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt
>> index dfc67b90591c..5682b2010e50 100644
>> --- a/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt
>> +++ b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt
>> @@ -16,7 +16,9 @@ Required properties:
>>    second cell is used to specify optional parameters:
>>    - bit 0 specifies polarity (0 for normal, 1 for inverted)
>>  - interrupts : The interrupt outputs from the controller. One interrupt per
>> -  individual bank followed by the "all banks" interrupt.
>> +  individual bank followed by the "all banks" interrupt. For BCM7211, an
>> +  additional set of per-bank interrupt line and an "all banks" wake-up
>> +  interrupt may be specified.
> 
> Is 'all banks' the name? Generally 'wakeup' is used for a wake up irq.

The firmware provided DTB on 7211 names the interrupts "gpio_%d" for the
standard interrupts, including the "all banks" which is then "gpio_3"
and the wake-up interrupts are named "gpio_%d_wake", and the all banks
wake-up is "gpio_3_wake".
-- 
Florian