ARM: rockchip: fix undefined instruction of reset_ctrl_regs

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Sometimes the debug module may not work well after resume, since it has
not been correctly reset when wakeup from suspend. That cause system
crash during reusme, and a 'undefined instruction' is displayed on the
console. Set the GRF_FORCE_JTAG bit of RK3288_GRF_SOC_CON0 can ensure
that debug modul is reset. And we can change the value of
RK3288_GRF_SOC_CON0 back when system resume.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Tested-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>

According to discussions, there does not seem a better solution available.
Please also see the potential security implication described in the
comment inline in the code.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>

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Chris Zhong 2015-03-22 00:04:51 +08:00 • committed by Heiko Stuebner

parent 0ea001d3b4

commit b403125d3b

2 changed files with 30 additions and 0 deletions

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26

arch/arm/mach-rockchip/pm.c

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4

arch/arm/mach-rockchip/pm.h

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