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SDHCI trap with register dump dropping SDIO clock

Question asked by vikramramanna on May 8, 2020
Latest reply on Jul 15, 2020 by Ramesh Rangavittal

iMX8MM dropping SDIO clock to 12MHz causes the SDHCI crash

 

[  641.123790] mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
[  641.130232] mmc0: sdhci: Sys addr:  0x54968d04 | Version:  0x00000002
[  641.136671] mmc0: sdhci: Blk size:  0x00000004 | Blk cnt:  0x00000001
[  641.143110] mmc0: sdhci: Argument:  0x15804004 | Trn mode: 0x00000013
[  641.149548] mmc0: sdhci: Present:   0x01d88a0a | Host ctl: 0x00000013
[  641.155986] mmc0: sdhci: Power:     0x00000002 | Blk gap:  0x00000080
[  641.162425] mmc0: sdhci: Wake-up:   0x00000008 | Clock:    0x0000028f
[  641.168863] mmc0: sdhci: Timeout:   0x0000008f | Int stat: 0x00000000
[  641.175301] mmc0: sdhci: Int enab:  0x107f100b | Sig enab: 0x107f100b
[  641.181739] mmc0: sdhci: AC12 err:  0x00000000 | Slot int: 0x00000502
[  641.188178] mmc0: sdhci: Caps:      0x07eb0000 | Caps_1:   0x8000b407
[  641.194616] mmc0: sdhci: Cmd:       0x0000353a | Max curr: 0x00ffffff
[  641.201054] mmc0: sdhci: Resp[0]:   0x00001000 | Resp[1]:  0x00000000
[  641.207492] mmc0: sdhci: Resp[2]:   0x00000000 | Resp[3]:  0x00000000
[  641.213930] mmc0: sdhci: Host ctl2: 0x00000088
[  641.218372] mmc0: sdhci: ADMA Err:  0x00000000 | ADMA Ptr: 0x5608d208
[  641.224809] mmc0: sdhci: ============================================

 

NXP team, can someone point to what could be the reason

 

Don't see any issue with iMX8MQ or iMX6/7

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