linux-kernel - Re: [PATCH v1 0/2] iio: Add parent

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Message-ID: <ea85bd0e-90c5-ca08-172f-91d48e35f369@metafoo.de>
Date:   Mon, 6 Feb 2017 15:26:12 +0100
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        linux-kernel@...r.kernel.org, jic23@...nel.org,
        linux-iio@...r.kernel.org, knaack.h@....de, pmeerw@...erw.net
Cc:     fabrice.gasnier@...com, linaro-kernel@...ts.linaro.org,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: Re: [PATCH v1 0/2] iio: Add parent_trigger attribute to triggers

On 02/06/2017 03:21 PM, Benjamin Gaignard wrote:
> Thoses patches add parent_trigger attribute to IIO triggers.
> The goal is to allow triggers to use triggers like is this done for iio
> devices.
> With this patch it will be possible to chain triggers, for example
> stm32 triggers could be used as clock of an other triggers:
> echo "tim1_trgo" > trigger0/parent_trigger.

Can you explain how this is different to assigning the parent_trigger
directly to the device?