From: heiko@sntech.de (Heiko Stübner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: rockchip: disable dapswjdp during suspend
Date: Sat, 25 Apr 2015 02:14:58 +0200 [thread overview]
Message-ID: <2083913.tsdTRJp6Sn@diego> (raw)
In-Reply-To: <1429077431-31326-1-git-send-email-zyw@rock-chips.com>
Am Mittwoch, 15. April 2015, 13:57:11 schrieb Chris Zhong:
> Reset dapswjdp is controlled by JTAG_TRSTN, if the iomux of this pin is
> not "jtag_trstn". the AP would think this pin is always high, so it can
> not reset before resume. When system resume, but the dapswjdp is not in
> a default state, it may Access some illegal address, it cause system
> crash during resume.
> Let's disable this jtag function by clear the dapdeviceen bit, it
> prohibit the dapswjdp to access memory and registers. This bit would
> be enable in MASKROM, so we need clear it in suspend everytime.
>
> Signed-off-by: Chris Zhong <zyw@rock-chips.com>
applied to a fixes branch for 4.1
Thanks
Heiko
prev parent reply other threads:[~2015-04-25 0:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-15 5:57 [PATCH] ARM: rockchip: disable dapswjdp during suspend Chris Zhong
2015-04-15 22:38 ` Doug Anderson
2015-04-25 0:14 ` Heiko Stübner [this message]
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