linux-kernel - Re: [PATCH 4.19 073/321] bus: ti-sysc: Check for no-reset and no-idle flags at the child level

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Message-ID: <20191204130007.GB25176@duo.ucw.cz>
Date:   Wed, 4 Dec 2019 14:00:07 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 073/321] bus: ti-sysc: Check for no-reset and
 no-idle flags at the child level

On Tue 2019-12-03 23:32:19, Greg Kroah-Hartman wrote:
> From: Tony Lindgren <tony@...mide.com>
> 
> [ Upstream commit 4014c08ba39476a18af546186da625a6833a1529 ]
> 
> With ti-sysc, we need to now have the device tree properties for
> ti,no-reset-on-init and ti,no-idle-on-init at the module level instead
> of the child device level.
> 
> Let's check for these properties at the child device level to enable
> quirks, and warn about moving the properties to the module level.
> 
> Otherwise am335x-evm based boards tagging gpio1 with ti,no-reset-on-init
> will have their DDR power disabled if wired up in such a tricky way.
> 
> Note that this should not be an issue for earlier kernels as we don't
> rely on this until the dts files have been updated to probe with ti-sysc
> interconnect target driver.

This is queued for 4.19-stable, but the comment seems to say it is not
needed in the older kernels.

Tony, do we want this in 4.19?

Best regards,
							Pavel
							
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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