mt1873-evb: MMC failing with linux-next
Kevin Hilman
khilman at baylibre.com
Mon Feb 8 17:18:55 PST 2016
Hello,
I tried getting MMC working with linux-next (next-20160208) on
mt8173-evb by enabling a few options[1] on top of the default defconfig,
and this results in a kernel that hangs as soon as it starts userspace.
The MMC driver seems to start, though has some regulator issues:
[ 0.526380] sdhci: Secure Digital Host Controller Interface driver
[ 0.527176] sdhci: Copyright(c) Pierre Ossman
[ 0.528835] vio18: unsupportable voltage range: 3300000-1980000uV
[ 0.529610] mtk-msdc 11230000.mmc: Regulator set error -22: 3300000 - 3300000
[ 0.563731] mtk-msdc 11240000.mmc: Got CD GPIO
The driver appears to be attempting to set 3.3V but using a 1.8V
regulator (vio18), which is failing.
Then, the kernel hangs after freeing unused memory:
[ 0.616386] hctosys: unable to open rtc device (rtc0)
[ 0.624118] usb_vbus: disabling
[ 0.624547] vusb: disabling
[ 0.624929] vgp6: disabling
[ 0.625635] ALSA device list:
[ 0.626009] No soundcards found.
[ 0.626963] Freeing unused kernel memory: 724K (ffffffc000977000 - ffffffc000a2c000)
And nothing further here.
It boots fine when disabling the MMC driver (CONFIG_MMC_MTK=n).
Any ideas?
Kevin
[1]
CONFIG_MMC_MTK=y
CONFIG_MFD_MT6397=y
CONFIG_REGULATOR_MT6397=y
CONFIG_MTK_PMIC_WRAP=y
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