i.MX8 MCIMX8M-EVK: Wakeup from sleep, USB Device Mode

[kchau101]

i.MX8 Low Power Mode:

How do you set the i.MX8 to wakeup from sleep from a USB Plug-in event? I've looked at 6.1 in IMXLUG, Rev. L4.9.88_2.0.0-ga, 05/2018, and it only mentions setting the debug UART as a wakeup source. I'd like to have the device wakeup when the USB-C cable is plugged into a host; is this supported by the NXP BSP? I am using the NXP i.MX BSP

4.9.88_2.0.0-ga release whose manifest I used with following command:

repo init -u https://source.codeaurora.org/external/imx/imx-manifest  -b imx-linux-rocko -m imx-4.9.88-2.0.0_ga.xml

My settings used for the bitbake environment were:

MACHINE=imx8mqevk DISTRO=fsl-imx-xwayland ./fsl-setup-release.sh -b bld-xwayland

I built the fsl-image-gui recipe; i have already successfully suspended the device and woke up from debug UART activity.

Regards,

Kevin

[igorpadykov]

Hi Kevin

one can try procedure described in sect.4.10.2.3 USB Wakeup Usage

attached Linux Manual with Demo Images "Linux Binary Demo Files - i.MX 8MQuad EVK"

https://www.nxp.com/webapp/Download?colCode=L4.9.51_IMX8MQ_GA&appType=license&location=null&Parent_n... 

Best regards
igor
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[kchau101]

Igor,

I looked at 4.10.2.3, but my issue is that none of the files it references in /sys/bus/platform/devices exist, see

root@imx8mqevk:~# ls /sys/bus/platform/devices
100000.caam-sm                      30a40000.i2c                  gpc_power_domain@10
30010000.sai                             30a70000.mipi_csi1       gpc_power_domain@2
30040000.sai                             30a90000.csi1_bridge    gpc_power_domain@3
30050000.sai                             30aa0000.mu                  gpc_power_domain@4
30200000.gpio                           30b40000.usdhc             gpc_power_domain@5
30210000.gpio                           30b50000.usdhc             gpc_power_domain@8
30220000.gpio                           30bb0000.qspi                gpc_power_domain@9
30230000.gpio                           30bd0000.sdma             hdmi-audio-codec
30240000.gpio                           30be0000.ethernet         imx-dcss-crtc.0
30260000.tmu                            32c00000.hdmi              imx8mq-cpufreq
30280000.wdog                         32e00000.dcss              imx_ion
302c0000.sdma                         32e2d000.irqsteer         imx_rpmsg
302d0000.gpt                             33000000.dma-apbh     modem-reset
30330000.iomuxc                      33800000.pcie               pmu
30340000.iomuxc-gpr                33c00000.pcie               psci
30350000.ocotp-ctrl                   38000000.gpu                reg-dummy
30360000.anatop                        38100000.dwc3             regulators
30370000.caam-snvs                 381f0040.phy                regulators:regulator-gpio
30370000.snvs                            38200000.dwc3            regulators:usdhc2_vmmc
30370000.snvs:snvs-powerkey  382f0040.phy                regulatory.0
30370000.snvs:snvs-rtc-lp          38300000.vpu              serial8250
30390000.src                               3d800000.ddr_pmu      snd-soc-dummy
306a0000.system-counter          Fixed MDIO bus.0        sound-ak4458
30810000.spdif                            alarmtimer                    sound-ak5558
30860000.serial                           b8000000.rpmsg          sound-hdmi
30880000.serial                           bcmdhd_wlan@0         sound-hdmi-arc
308a0000.spdif                            busfreq                         sound-spdif
308b0000.sai                               caam_secvio               sound-wm8524
30900000.caam                          caam_sm                     timer
30901000.jr0                               display-subsystem      usb@38100000
30902000.jr1                               dma_cap                      usb@38200000
30903000.jr2                               gpc_power_domain@0    wm8524
30a20000.i2c                              gpc_power_domain@1    xhci-hcd.0.auto

Is there some setting that needs to be changed in the defconfig for the system to use the ci_hdrc driver mentioned in 4.10.2.3?