linux-kernel - Re: [PATCH/RFT v2 09/17] regulator: fixed: Add over current event

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Message-ID: <20161030204202.7t6qcwin7b5qi2ia@rob-hp-laptop>
Date:   Sun, 30 Oct 2016 15:42:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     ahaslam@...libre.com
Cc:     gregkh@...uxfoundation.org, johan@...nel.org, nsekhar@...com,
        stern@...land.harvard.edu, khilman@...libre.com,
        sshtylyov@...mvista.com, david@...hnology.com,
        manjunath.goudar@...aro.org, broonie@...nel.org,
        abailon@...libre.com, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH/RFT v2 09/17] regulator: fixed: Add over current event

On Mon, Oct 24, 2016 at 06:46:26PM +0200, ahaslam@...libre.com wrote:
> From: Axel Haslam <ahaslam@...libre.com>
> 
> Some regulator supplies have an over-current pin that is
> activated when the hw detects an over current condition.
> When this happens, the hardware enters a current limited
> mode.
> 
> Extend the fixed regulator driver with the ability
> to handle irq's from the over-current pin and report
> an over current event to the consumers via a regulator
> notifier. Also, add device tree bindings to allow to
> pass a gpio for over current monitoring.
> 
> Signed-off-by: Axel Haslam <ahaslam@...libre.com>
> ---
>  .../bindings/regulator/fixed-regulator.txt         |  4 ++
>  drivers/regulator/fixed.c                          | 64 ++++++++++++++++++++++
>  include/linux/regulator/consumer.h                 |  5 ++
>  include/linux/regulator/fixed.h                    |  3 +
>  4 files changed, 76 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
> index 4fae41d..d20bf67 100644
> --- a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
> +++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
> @@ -11,6 +11,8 @@ If this property is missing, the default assumed is Active low.
>  - gpio-open-drain: GPIO is open drain type.
>    If this property is missing then default assumption is false.
>  -vin-supply: Input supply name.
> +- oc-gpio: Input gpio that signals an over current condition

"-gpios" is the preferred form. So "oc-gpios".

> +- oc-active-high: The polarity of the over current pin is high

This should be specified in the gpio flags cell.

Rob