[PATCH] ARM: rockchip: disable dapswjdp during suspend
heiko at sntech.de
Fri Apr 24 17:14:58 PDT 2015
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 at rock-chips.com>
applied to a fixes branch for 4.1
More information about the Linux-rockchip