[参考译文] AM625：挂起至 RAM 现在支持一个 A53内核

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1452490/am625-suspend-to-ram-does-now-work-with-one-a53-core

工具与软件：

您好！

我的客户使用 SK-AM62-LP 和 Linux SDK 09.02.01.10 /评估挂起至 RAM  10.00.07.04。
挂起至 RAM 进入由以下命令完成。

root@am62xx-LP-EVM：~# echo deep >/sys/power/mem_sleep
root@am62xx-LP-EVM：~# echo mem >/sys/power/state

将 USB 电缆连接到板上的 Type-C 连接器即可唤醒。
当所有4个内核都启用后、它会正常运行。
下面是日志。

root@am62xx-lp-evm:~# cat /proc/cmdline
console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 root=/dev/mmcblk1p2 rw rootfstype=ext4 rootwait resume=/dev/mmcblk1p3 resumewait no_console_suspend
root@am62xx-lp-evm:~#
root@am62xx-lp-evm:~# cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 400.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 1
BogoMIPS        : 400.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 2
BogoMIPS        : 400.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 3
BogoMIPS        : 400.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

root@am62xx-lp-evm:~# uname -a
Linux am62xx-lp-evm 6.1.83-ti-gc1c2f1971fbf #1 SMP PREEMPT Mon May 13 20:19:51 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
root@am62xx-lp-evm:~#
root@am62xx-lp-evm:~# echo deep > /sys/power/mem_sleep
root@am62xx-lp-evm:~# echo mem > /sys/power/state
[   40.801705] PM: suspend entry (deep)
[   41.073248] Filesystems sync: 0.267 seconds
[   41.112697] remoteproc remoteproc0: stopped remote processor 5000000.m4fss
[   41.120145] Freezing user space processes
[   41.126412] Freezing user space processes completed (elapsed 0.002 seconds)
[   41.133495] OOM killer disabled.
[   41.136737] Freezing remaining freezable tasks
[   41.142749] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
[[   41.830706] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 19
[   41.846209] am65-cpsw-nuss 8000000.ethernet eth0: PHY [8000f00.mdio:00] driver [TI DP83867] (irq=POLL)
[   41.855547] am65-cpsw-nuss 8000000.ethernet eth0: configuring for phy/rgmii-rxid link mode
[   41.997888] OOM killer enabled.
[   42.001117] Restarting tasks ... done.
[   42.007708] random: crng reseeded on system resumption
[   42.013012] remoteproc remoteproc0: powering up 5000000.m4fss
[   42.018860] remoteproc remoteproc0: Booting fw image am62-mcu-m4f0_0-fw, size 55016
[   42.028102] rproc-virtio rproc-virtio.2.auto: assigned reserved memory node m4f-dma-memory@9cb00000
[   42.038833] virtio_rpmsg_bus virtio0: rpmsg host is online
[   42.039140] virtio_rpmsg_bus virtio0: creating channel ti.ipc4.ping-pong addr 0xd
[   42.044598] rproc-virtio rproc-virtio.2.auto: registered virtio0 (type 7)
[   42.053845] virtio_rpmsg_bus virtio0: creating channel rpmsg_chrdev addr 0xe
[   42.058750] remoteproc remoteproc0: remote processor 5000000.m4fss is now up
[   42.073111] PM: suspend exit
root@am62xx-lp-evm:~# [   42.489760] xhci-hcd xhci-hcd.7.auto: xHCI Host Controller
[   42.495601] xhci-hcd xhci-hcd.7.auto: new USB bus registered, assigned bus number 2
[   42.504081] xhci-hcd xhci-hcd.7.auto: USB3 root hub has no ports
[   42.510217] xhci-hcd xhci-hcd.7.auto: hcc params 0x0258fe6d hci version 0x110 quirks 0x0000008000010010
[   42.519827] xhci-hcd xhci-hcd.7.auto: irq 464, io mem 0x31000000
[   42.527166] hub 2-0:1.0: USB hub found
[   42.531215] hub 2-0:1.0: 1 port detected
[   42.788555] usb 2-1: new low-speed USB device number 2 using xhci-hcd
[   42.990339] input:         USB Keyboard as /devices/platform/bus@f0000/f900000.dwc3-usb/31000000.usb/xhci-hcd.7.auto/usb2/2-1/2-1:1.0/0003:0566:3107.0001/input/input0
[   43.065930] hid-generic 0003:0566:3107.0001: input: USB HID v1.10 Keyboard [        USB Keyboard] on usb-xhci-hcd.7.auto-1/input0
[   43.087592] input:         USB Keyboard System Control as /devices/platform/bus@f0000/f900000.dwc3-usb/31000000.usb/xhci-hcd.7.auto/usb2/2-1/2-1:1.1/0003:0566:3107.0002/input/input1
[   43.161530] input:         USB Keyboard Consumer Control as /devices/platform/bus@f0000/f900000.dwc3-usb/31000000.usb/xhci-hcd.7.auto/usb2/2-1/2-1:1.1/0003:0566:3107.0002/input/input2
[   43.178332] hid-generic 0003:0566:3107.0002: input: USB HID v1.10 Device [        USB Keyboard] on usb-xhci-hcd.7.auto-1/input1

root@am62xx-lp-evm:~#

root@am62xx-lp-evm:~# cat /proc/cmdline
console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 root=/dev/mmcblk1p2 rw rootfstype=ext4 rootwait resume=/dev/mmcblk1p3 resumewait no_console_suspend maxcpus=1
root@am62xx-lp-evm:~# cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 400.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

root@am62xx-lp-evm:~# uname -a
Linux am62xx-lp-evm 6.1.83-ti-gc1c2f1971fbf #1 SMP PREEMPT Mon May 13 20:19:51 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
root@am62xx-lp-evm:~# echo deep > /sys/power/mem_sleep
root@am62xx-lp-evm:~# echo mem > /sys/power/state
[   62.851102] PM: suspend entry (deep)
[   62.945695] Filesystems sync: 0.090 seconds
[   62.978549] remoteproc remoteproc0: stopped remote processor 5000000.m4fss
[   62.994514] Freezing user space processes
[   63.004070] Freezing user space processes completed (elapsed 0.001 seconds)
[   63.011291] OOM killer disabled.
[   63.014521] Freezing remaining freezable tasks
[   63.020376] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)