From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@kernel.org (Kevin Hilman) Date: Wed, 03 Dec 2014 11:23:26 -0800 Subject: [PATCH v10 0/4] This suspend patch is only support cut off the power of cpu and some external In-Reply-To: <547F1639.3030102@rock-chips.com> (Chris Zhong's message of "Wed, 03 Dec 2014 21:55:05 +0800") References: <1417423940-1669-1-git-send-email-zyw@rock-chips.com> <7htx1f409k.fsf@deeprootsystems.com> <7hmw763kql.fsf@deeprootsystems.com> <547F1639.3030102@rock-chips.com> Message-ID: <7hiohszgep.fsf@deeprootsystems.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Chris Zhong writes: [...] > I have test these patches on evb board base on next-20141128 with a > defconfig[0], and with u-boot[1]. > As Doug said, we need below 3 patches for resume. > > 1.https://patchwork.kernel.org/patch/5051881/ - clocksource: > arch_timer: Allow the device tree to specify uninitialized timer > registers > > 2.https://patchwork.kernel.org/patch/5363671/ - clocksource: > arch_timer: Fix code to use physical timers when requested > > 3.https://patchwork.kernel.org/patch/5382141/ - ARM: dts: rk3288: add > arm,cpu-registers-not-fw-configured > > > And it will auto wakeup, as Heiko said in v8. OK, with your series plus those 3 patches on top of next-20141128, I'm now seeing it auto-wakeup, either with multi_v7_defconfig or Heiko's rk3288_defconfig. > But I have never notice before, since the u-boot never enable edp, and > I use the coreboot with edp display. Actually it is a bug in rk3288, > the rk3288 have not 27Mhz clock source, but the edp initially set to > this non-existent clock. At this time, edp is working on a unknown > state, and it always bring a interrupt, this interrupt avoid system > enter suspend. I see, good find! > So if we want to enter suspend normally, the > edp_24m_sel(bit 15) of CRU_CLKSEL28_CON(0xff7600d0) must be set to 1. I didn't try your u-boot fix, but it sounds like there should be a kernel fix for this. Why doesn't the disabling of unused clocks put the EDP into a safe/disabled state? Kevin