iMX6 SDIO suspend problem

teddy123 — Mon, 16 Mar 2015 14:05:16 GMT

Hi All,

While trying to test suspend/resume of sdio(wifi) module of my imx6 sabresd board, I encountered the following problem where the sdio module fails to go to suspend mode.

Log:

Freezing user space processes ... (elapsed 0.01 seconds) done.

Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.

wl1271_sdio mmc2:0001:2: can't keep power while host is suspended

pm_op(): platform_pm_suspend+0x0/0x5c returns -22

PM: Device sdhci-esdhc-imx.2 failed to suspend: error -22

PM: Some devices failed to suspend

While debugging this problem, I came across a flag MMC_PM_KEEP_POWER which needs to be set for sdio module to suspend. I took reference from the link iMX28 SDIO suspend fails on a 802.11n module but didn succeed. Where do I need to set this flag?

I am using freescale BSP kk4.4.2_1.0.0-ga with linux kernel version 3.0.35.

Re: iMX6 SDIO suspend problem

jimmychan — Mon, 30 Mar 2015 14:39:53 GMT

the flag MMC_PM_KEEP_POWER can be found in linux/include/linux/mmc/pm.h

topic iMX6 SDIO suspend problem in i.MX Processors

iMX6 SDIO suspend problem

Re: iMX6 SDIO suspend problem