linux-kernel - Re: [PATCH v2 1/3] mailbox/omap: Add ti,mbox-send-noirq quirk to fix AM33xx CPU Idle

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Message-ID: <20150805102840.GA16878@atomide.com>
Date:	Wed, 5 Aug 2015 03:28:40 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Dave Gerlach <d-gerlach@...com>
Cc:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Jassi Brar <jassisinghbrar@...il.com>,
	Santosh Shilimkar <ssantosh@...nel.org>,
	Suman Anna <s-anna@...com>, Keerthy <j-keerthy@...com>
Subject: Re: [PATCH v2 1/3] mailbox/omap: Add ti,mbox-send-noirq quirk to fix
 AM33xx CPU Idle

* Dave Gerlach <d-gerlach@...com> [150717 13:59]:
> --- a/Documentation/devicetree/bindings/mailbox/omap-mailbox.txt
> +++ b/Documentation/devicetree/bindings/mailbox/omap-mailbox.txt
> @@ -75,6 +75,14 @@ data that represent the following:
>      Cell #3 (usr_id)  - mailbox user id for identifying the interrupt line
>                          associated with generating a tx/rx fifo interrupt.
>  
> +Optional Properties:
> +--------------------
> +- ti,mbox-send-noirq:   Quirk flag to allow the client user of this sub-mailbox
> +                        to send messages without triggering a Tx ready interrupt,
> +                        and to control the Tx ticker. Should be used only on
> +                        sub-mailboxes used to communicate with WkupM3 remote
> +                        processor on AM33xx/AM43xx SoCs.
> +

Hmm can't you do this just by setting a flag in the device driver
based on the compatible string?

Regards,

Tony
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