On Tue, Feb 14, 2017 at 9:19 AM, Chunyan Zhang
<chunyan.zhang@xxxxxxxxxxxxxx> wrote:
> From: Orson Zhai <orson.zhai@xxxxxxxxxxxxxx>
>
> 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 <orson.zhai@xxxxxxxxxxxxxx>
> Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxxxxxx>
> ---
> 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.
Can you get me the dump of:
grep "" /sys/devices/system/cpu/cpu*/cpuidle/state*/{time,usage}
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
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