*ERR => whilst initialising MMC card

[T_a]

I want to read SD card but it was error. I have use dmesg to look and got this:

[ 2901.288285] sdhci_msm 7864900.sdhci: no support for card’s volts
[ 2901.288303] mmc0: error -22 whilst initialising MMC card
[ 2902.405661] mmc0: error -84 whilst initialising SDIO card

and no mmc in lsmod
root@swi-mdm9x28-wp:~# ls /dev/mmc*
ls: /dev/mmc*: No such file or directory

[jyijyi]

you need to try more SD card.
As i know, not all SD card can be read.

Micro SD Support on MangOH

[T_a]

I have use with the my old wp76xx it can read
FW : I have used this (mangOH Yellow Resources - Software - mangOH) to install:

[ 43.699789] sdhci_msm 7864900.sdhci: sdhci_msm_probe: ICE device is not enabd
[ 43.699831] of_get_named_gpiod_flags: can’t parse ‘cd-gpios’ property of nod’
[ 43.701184] sdhci_msm 7864900.sdhci: sdhci_msm_pm_qos_parse_irq: error -22 ru
[ 43.708484] sdhci_msm 7864900.sdhci: sdhci_msm_pm_qos_parse: PM QoS voting fd
[ 43.708506] sdhci_msm 7864900.sdhci: sdhci_msm_pm_qos_parse: PM QoS voting fd
[ 43.746275] sdhci_msm 7864900.sdhci: No vmmc regulator found
[ 43.746299] sdhci_msm 7864900.sdhci: No vqmmc regulator found
[ 43.746802] mmc0: SDHCI controller on 7864900.sdhci [7864900.sdhci] using 32e
[ 43.830966] mmc0: new high speed SDHC card at address 0001
[ 43.832013] mmcblk0: mmc0:0001 00000 7.25 GiB
[ 43.833997] mmcblk0: p1
[ 46.022744] usbcore: registered new interface driver brcmfmac

but the new one for the factory it give me the error as above
should I have to install fw or other before?? I haven’t done any thing with it yet.

[jyijyi]

If same software is used, probably it is hardware connection problem in the metal case

[T_a]

1. I have use in different board. Does software and fw is affect to this??

2. Should I have to do any thing to get /dev/mmc before using sd card?
   root@swi-mdm9x28-wp:~# ls /dev/mmc*
   ls: /dev/mmc*: No such file or directory
   root@swi-mdm9x28-wp:~# lsmod
   Not tainted
   cfg80211 258877 0 - Live 0xbf000000

[jyijyi]

1. I don’t know, you need to test it
2. Please see the document on how to do mmc test

[T_a]

where can i get msm_sdcc driver from??

[jyijyi]

you can download the yocto source and go to yocto/kernel/drivers/mmc/host/msm_sdcc.c

[T_a]

how can i make .ko and install to wp76xx?

[jyijyi]

1. setup the yocto menuconfig:

# cd yocto
# make dev
build_bin# bitbake linux-quic -c menuconfig

2. add the following:

3. rebuild the yocto image by “make”

4. download the yocto image to the module

But it seems to me it is not for WP76xx (MDM9607 chipset), you can double check.

[T_a]

make dev is error how to fix it?

[jyijyi]

When build yocto:

Error: bash is not set as default provider for /bin/sh
       build is not guaranteed to work, aborting
make: *** [image_bin] Error 1

sudo apt-get remove ccache
sudo dpkg-reconfigure dash
Answer “No” to the question.

[T_a]

Where I have to add Symbol: MMC_MSM??

[jyijyi]

you should config it in the menuconfig (device driver → MMC/SD/SDIO card support)

[T_a]

I cannot find the text file to config
after device driver → MMC/SD/SDIO card support , Where I have to select next?

[jyijyi]

You can try to add the following in ./kernel/arch/arm/configs/mdm9607_defconfig and then rebuild the yocto image

CONFIG_MMC_MSM=y

[T_a]

yocto download error

Have another way to download?

[jyijyi]

It is normal that module reboot after image upgrade.

Another way to update image is that you can transfer the file by WINSCP in /tmp and then use “fwupdate download /tmp/yocto.cwe” in module’s console

[T_a]

It still cannot modprobe MSM_SDCC and cannot find .ko file
what shuold I do?

update result:

warning for “make image_bin” :

[jyijyi]

You can type some rubbish characters in msm_sdcc.c and see if there is error when make image

This can confirm if the msm_sdcc.c is compiled