linux-kernel - Re: [PATCH v4] clk: rockchip: switch PLLs to slow mode before reboot for rk3288

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Date:	Tue, 01 Dec 2015 19:25:24 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	Chris Zhong <zyw@...k-chips.com>
Cc:	dianders@...omium.org, Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] clk: rockchip: switch PLLs to slow mode before reboot for rk3288

Am Freitag, 27. November 2015, 10:09:30 schrieb Chris Zhong:
> We've been seeing some crashes at reboot test on rk3288-based systems,
> which boards have not reset pin connected to NPOR, they reboot by
> setting 0xfdb9 to RK3288_GLB_SRST_FST register. If the APLL works in
> a high frequency mode, some IPs might hang during soft reset.
> It appears that we can fix the problem by switching to slow mode before
> reboot, just like what we did before suspend.
> 
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> Reviewed-by: Heiko Stuebner <heiko@...ech.de>

applied to my clock branch for 4.5


Thanks
Heiko
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