linux-kernel - Re: [PATCH 2/3] gpio: of: support gpio-ranges for multiple gpiochip devices

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Date: Wed, 24 Apr 2024 16:14:31 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: Doug Berger <opendmb@...il.com>, Linus Walleij
 <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>
Cc: Phil Elwell <phil@...pberrypi.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, bcm-kernel-feedback-list@...adcom.com,
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] gpio: of: support gpio-ranges for multiple gpiochip
 devices

On 4/24/24 11:50, Doug Berger wrote:
> Some drivers (e.g. gpio-mt7621 and gpio-brcmstb) have multiple
> gpiochip banks within a single device. Unfortunately, the
> gpio-ranges property of the device node was being applied to
> every gpiochip of the device with device relative GPIO offset
> values rather than gpiochip relative GPIO offset values.
> 
> This commit makes use of the gpio_chip offset value which can be
> non-zero for such devices to split the device node gpio-ranges
> property into GPIO offset ranges that can be applied to each
> of the relevant gpiochips of the device.
> 
> Signed-off-by: Doug Berger <opendmb@...il.com>

Acked-by: Florian Fainelli <florian.fainelli@...adcom.com>
-- 
Florian


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