From mboxrd@z Thu Jan 1 00:00:00 1970 From: chunyan.zhang@spreadtrum.com (Chunyan Zhang) Date: Fri, 17 Feb 2017 15:28:39 +0800 Subject: [PATCH 1/5] arm64: dts: Add basic DT to support Spreadtrum's SP9860G In-Reply-To: References: <1487063952-7113-1-git-send-email-chunyan.zhang@spreadtrum.com> <1487063952-7113-2-git-send-email-chunyan.zhang@spreadtrum.com> Message-ID: <20170217072839.GA8767@spreadtrum.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Sudeep, On ?, 2? 14, 2017 at 04:44:53?? +0000, Sudeep Holla wrote: > On Tue, Feb 14, 2017 at 9:19 AM, Chunyan Zhang > wrote: > > From: Orson Zhai > > > > SC9860G is a 8 cores of A53 SoC with 4G LTE support SoC from Spreadtrum. > > > > According to regular hierarchy of sprd dts, whale2.dtsi contains SoC > > peripherals IP nodes, sc9860.dtsi contains stuff related to ARM core stuff > > and sp9860g dts is for the board level. > > > > Signed-off-by: Orson Zhai > > Signed-off-by: Chunyan Zhang > > --- > > arch/arm64/boot/dts/sprd/Makefile | 3 +- > > arch/arm64/boot/dts/sprd/sc9860.dtsi | 534 ++++++++++++++++++++++++++++++ > > arch/arm64/boot/dts/sprd/sp9860g-1h10.dts | 58 ++++ > > arch/arm64/boot/dts/sprd/whale2.dtsi | 66 ++++ > > 4 files changed, 660 insertions(+), 1 deletion(-) > > create mode 100644 arch/arm64/boot/dts/sprd/sc9860.dtsi > > create mode 100644 arch/arm64/boot/dts/sprd/sp9860g-1h10.dts > > create mode 100644 arch/arm64/boot/dts/sprd/whale2.dtsi > > > > diff --git a/arch/arm64/boot/dts/sprd/Makefile b/arch/arm64/boot/dts/sprd/Makefile > > index b658c5e..f0535e6 100644 > > --- a/arch/arm64/boot/dts/sprd/Makefile > > +++ b/arch/arm64/boot/dts/sprd/Makefile > > @@ -1,4 +1,5 @@ > > -dtb-$(CONFIG_ARCH_SPRD) += sc9836-openphone.dtb > > +dtb-$(CONFIG_ARCH_SPRD) += sc9836-openphone.dtb \ > > + sp9860g-1h10.dtb > > > > always := $(dtb-y) > > subdir-y := $(dts-dirs) > > diff --git a/arch/arm64/boot/dts/sprd/sc9860.dtsi b/arch/arm64/boot/dts/sprd/sc9860.dtsi > > new file mode 100644 > > index 0000000..604a8c9 > > --- /dev/null > > +++ b/arch/arm64/boot/dts/sprd/sc9860.dtsi > > @@ -0,0 +1,534 @@ > > [...] > > > + idle-states{ > > + entry-method = "arm,psci"; > > + > > + CORE_PD: core_pd { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <700>; > > + min-residency-us = <2500>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x00010002>; > > + }; > > + > > + CLUSTER_PD: cluster_pd { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <1000>; > > + min-residency-us = <3000>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x01010003>; > > + }; > > + > > + DEEP_SLEEP: deep_sleep { > > + compatible = "arm,idle-state"; > > + wakeup-latency-us = <0xffffffff>; > > A value > 4294 seconds(i.e >1 hour) seems suspicious. > Are you working around the firmware issue with high latency value so > that it's never entered ? Why not remove advertising the state from DT. > Haved checked with related colleagues, this node 'deep_sleep' was not for working around any firmware issue, but was a trick utilization of idle subsystem, and that was definitely not elegant, the author indeed intendly didn't want CPU entered this state, I will remove this node therefore. > Can you get me the dump of: > grep "" /sys/devices/system/cpu/cpu*/cpuidle/state*/{time,usage} > FYI: https://www.irccloud.com/pastebin/XyEMLzfq/ Thanks, Chunyan > IIUC, you might have seen boot issue without this values and workaround > the issue with such high values ? If so please drop this state. > > > + entry-latency-us = <1500>; > > + exit-latency-us = <1500>; > > + min-residency-us = <0xffffffff>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x01010005>; > > + }; > > + }; > > > > -- > Regards, > Sudeep From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chunyan Zhang Subject: Re: [PATCH 1/5] arm64: dts: Add basic DT to support Spreadtrum's SP9860G Date: Fri, 17 Feb 2017 15:28:39 +0800 Message-ID: <20170217072839.GA8767@spreadtrum.com> References: <1487063952-7113-1-git-send-email-chunyan.zhang@spreadtrum.com> <1487063952-7113-2-git-send-email-chunyan.zhang@spreadtrum.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Sudeep Holla Cc: Mark Rutland , 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Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755711AbdBQHaa (ORCPT ); Fri, 17 Feb 2017 02:30:30 -0500 Received: from sci-ig2.spreadtrum.com ([222.66.158.135]:44528 "EHLO SHSQR01.spreadtrum.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1755057AbdBQHa2 (ORCPT ); Fri, 17 Feb 2017 02:30:28 -0500 Date: Fri, 17 Feb 2017 15:28:39 +0800 From: Chunyan Zhang To: Sudeep Holla CC: Rob Herring , Mark Rutland , Greg Kroah-Hartman , Catalin Marinas , Will Deacon , Arnd Bergmann , , , open list , linux-arm Subject: Re: [PATCH 1/5] arm64: dts: Add basic DT to support Spreadtrum's SP9860G Message-ID: <20170217072839.GA8767@spreadtrum.com> Mail-Followup-To: Sudeep Holla , Rob Herring , Mark Rutland , Greg Kroah-Hartman , Catalin Marinas , Will Deacon , Arnd Bergmann , devicetree@vger.kernel.org, orson.zhai@spreadtrum.com, open list , linux-arm References: <1487063952-7113-1-git-send-email-chunyan.zhang@spreadtrum.com> <1487063952-7113-2-git-send-email-chunyan.zhang@spreadtrum.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-MAIL: SHSQR01.spreadtrum.com v1H7T7El031567 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Sudeep, On 二, 2月 14, 2017 at 04:44:53下午 +0000, Sudeep Holla wrote: > On Tue, Feb 14, 2017 at 9:19 AM, Chunyan Zhang > wrote: > > From: Orson Zhai > > > > SC9860G is a 8 cores of A53 SoC with 4G LTE support SoC from Spreadtrum. > > > > According to regular hierarchy of sprd dts, whale2.dtsi contains SoC > > peripherals IP nodes, sc9860.dtsi contains stuff related to ARM core stuff > > and sp9860g dts is for the board level. > > > > Signed-off-by: Orson Zhai > > Signed-off-by: Chunyan Zhang > > --- > > arch/arm64/boot/dts/sprd/Makefile | 3 +- > > arch/arm64/boot/dts/sprd/sc9860.dtsi | 534 ++++++++++++++++++++++++++++++ > > arch/arm64/boot/dts/sprd/sp9860g-1h10.dts | 58 ++++ > > arch/arm64/boot/dts/sprd/whale2.dtsi | 66 ++++ > > 4 files changed, 660 insertions(+), 1 deletion(-) > > create mode 100644 arch/arm64/boot/dts/sprd/sc9860.dtsi > > create mode 100644 arch/arm64/boot/dts/sprd/sp9860g-1h10.dts > > create mode 100644 arch/arm64/boot/dts/sprd/whale2.dtsi > > > > diff --git a/arch/arm64/boot/dts/sprd/Makefile b/arch/arm64/boot/dts/sprd/Makefile > > index b658c5e..f0535e6 100644 > > --- a/arch/arm64/boot/dts/sprd/Makefile > > +++ b/arch/arm64/boot/dts/sprd/Makefile > > @@ -1,4 +1,5 @@ > > -dtb-$(CONFIG_ARCH_SPRD) += sc9836-openphone.dtb > > +dtb-$(CONFIG_ARCH_SPRD) += sc9836-openphone.dtb \ > > + sp9860g-1h10.dtb > > > > always := $(dtb-y) > > subdir-y := $(dts-dirs) > > diff --git a/arch/arm64/boot/dts/sprd/sc9860.dtsi b/arch/arm64/boot/dts/sprd/sc9860.dtsi > > new file mode 100644 > > index 0000000..604a8c9 > > --- /dev/null > > +++ b/arch/arm64/boot/dts/sprd/sc9860.dtsi > > @@ -0,0 +1,534 @@ > > [...] > > > + idle-states{ > > + entry-method = "arm,psci"; > > + > > + CORE_PD: core_pd { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <700>; > > + min-residency-us = <2500>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x00010002>; > > + }; > > + > > + CLUSTER_PD: cluster_pd { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <1000>; > > + min-residency-us = <3000>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x01010003>; > > + }; > > + > > + DEEP_SLEEP: deep_sleep { > > + compatible = "arm,idle-state"; > > + wakeup-latency-us = <0xffffffff>; > > A value > 4294 seconds(i.e >1 hour) seems suspicious. > Are you working around the firmware issue with high latency value so > that it's never entered ? Why not remove advertising the state from DT. > Haved checked with related colleagues, this node 'deep_sleep' was not for working around any firmware issue, but was a trick utilization of idle subsystem, and that was definitely not elegant, the author indeed intendly didn't want CPU entered this state, I will remove this node therefore. > Can you get me the dump of: > grep "" /sys/devices/system/cpu/cpu*/cpuidle/state*/{time,usage} > FYI: https://www.irccloud.com/pastebin/XyEMLzfq/ Thanks, Chunyan > IIUC, you might have seen boot issue without this values and workaround > the issue with such high values ? If so please drop this state. > > > + entry-latency-us = <1500>; > > + exit-latency-us = <1500>; > > + min-residency-us = <0xffffffff>; > > + local-timer-stop; > > + arm,psci-suspend-param = <0x01010005>; > > + }; > > + }; > > > > -- > Regards, > Sudeep