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Thu, 19 Nov 2020 03:59:52 +0000 Received: by smtp421.mail.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 2c08141d4a6468c32c06bd5bb186bf8f; Thu, 19 Nov 2020 03:59:46 +0000 (UTC) Subject: Re: [yocto] Raspberry PI enabling MMC1 To: yocto@lists.yoctoproject.org References: <61df164e-fa3a-7517-33e8-db8ef0c8af92.ref@yahoo.com> <61df164e-fa3a-7517-33e8-db8ef0c8af92@yahoo.com> <16488BC657DA2093.23836@lists.yoctoproject.org> From: "chuck kamas" Message-ID: <97ca6687-fa2f-869b-b433-cbdfad852fa8@yahoo.com> Date: Wed, 18 Nov 2020 19:59:44 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <16488BC657DA2093.23836@lists.yoctoproject.org> X-Mailer: WebService/1.1.16944 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.8) Content-Type: multipart/alternative; boundary="------------53CAA7F55E1117554566AD12" Content-Language: en-US --------------53CAA7F55E1117554566AD12 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Raj, I found out how to debug the boot process of the PI from: https://github.com/raspberrypi/documentation/blob/master/hardware/raspberrypi/bootmodes/README.md by turning on the boot code debug. sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin I found out that the sdio overlay does not exist! > MESS:00:00:07.868162:0: dtdebug: Failed to open overlay file > 'overlays/sdio.dtbo' > MESS:00:00:07.874093:0: Failed to load overlay 'sdio' > MESS:00:00:07.878881:0: brfs: File read: /mfs/sd/overlays/sdio.dtbo > MESS:00:00:07.891322:0: brfs: File read: /mfs/sd/cmdline.txt > So what am I missing on how to turn on the sdio on GPIO22-27? Is it not an overlay and instead a driver/other code/linux config that needs to be set? Chuck On 11/17/20 4:29 PM, chuck kamas via lists.yoctoproject.org wrote: > Raj, > > > Thanks for taking the time to respond. I thought of that too. My > custom Yocto build has the line to turn on the sdio in it: > >> dtoverlay=sdio,poll_once=off > > I have attached the entire file: config.txt.yocto > > However, the Rasbian image does not have any mention of the dtoverlay > for the sdio.  Curious. See config.txt attached. > > > Thanks for the help! > > Chuck > > > On 11/17/20 12:08 AM, Khem Raj wrote: >> On Mon, Nov 16, 2020 at 11:43 PM chuck kamas via >> lists.yoctoproject.org >> wrote: >>> Hi all, >>> >>> >>> I have been spinning my wheels for two days trying to discover how to >>> enable MMC1 on a CM3. This is the one on GPIO22-27. I can boot Rasbian >>> on the CM3 and it inits the MMC1 and its pins just fine. I can >>> read/write to my SD card from it etc. However, when I build yocto it >>> leaves the GPIOS22-27 in gpio mode and does not set them to MMC1 mode. >>> I have tried changing the device tree as described here: >>> >>> https://stackoverflow.com/questions/44702426/how-to-setup-an-own-device-tree-for-a-raspberrypi-in-yocto >>> >>> >>> That compiles and add the .dtbo to my build, but still the GPIOS are >>> not >>> set to MMC1 mode. >>> >>>> cat /sys/kernel/debug/pinctrl/*gpio*/pinmux-pins >>>> Pinmux settings per pin >>>> Format: pin (name): mux_owner gpio_owner hog? >>>> .... >>>> >>>> pin 22 (gpio22): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> pin 23 (gpio23): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> pin 24 (gpio24): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> pin 25 (gpio25): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> pin 26 (gpio26): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> pin 27 (gpio27): (MUX UNCLAIMED) (GPIO UNCLAIMED) >>>> >>>> ..... >>>> >>> I have looked at: >>> >>> https://ralimtek.com/raspberry%20pi/electronics/software/raspberry_pi_secondary_sd_card/ >>> >>> >>> >>> Any ideas of where to look next to turn on the sdio would be >>> appreciated! >>> >>> >> what does /boot/config.txt look like on raspbian and yocto built images >> >>> Chuck >>> >>> >>> >>> >>> > > > > > > --------------53CAA7F55E1117554566AD12 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Raj,


I found out how to debug the boot process of the PI from:

https://github.com/raspberrypi/documentation/blob/master/hardware/raspberrypi/bootmodes/README.md

by turning on the boot code debug.

sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin


I found out that the sdio overlay does not exist!

MESS:00:00:07.868162:0: dtdebug: Failed to open overlay file 'overlays/sdio.dtbo'
MESS:00:00:07.874093:0: Failed to load overlay 'sdio'
MESS:00:00:07.878881:0: brfs: File read: /mfs/sd/overlays/sdio.dtbo
MESS:00:00:07.891322:0: brfs: File read: /mfs/sd/cmdline.txt


So what am I missing on how to turn on the sdio on GPIO22-27? Is it not an overlay and instead a driver/other code/linux config that needs to be set?


Chuck


On 11/17/20 4:29 PM, chuck kamas via lists.yoctoproject.org wrote:
Raj,


Thanks for taking the time to respond. I thought of that too. My custom Yocto build has the line to turn on the sdio in it:

dtoverlay=sdio,poll_once=off

I have attached the entire file: config.txt.yocto

However, the Rasbian image does not have any mention of the dtoverlay for the sdio.  Curious. See config.txt attached.


Thanks for the help!

Chuck


On 11/17/20 12:08 AM, Khem Raj wrote:
On Mon, Nov 16, 2020 at 11:43 PM chuck kamas via
lists.yoctoproject.org <chuckkamas=yahoo.com@lists.yoctoproject.org>
wrote:
Hi all,


I have been spinning my wheels for two days trying to discover how to
enable MMC1 on a CM3. This is the one on GPIO22-27. I can boot Rasbian
on the CM3 and it inits the MMC1 and its pins just fine. I can
read/write to my SD card from it etc. However, when I build yocto it
leaves the GPIOS22-27 in gpio mode and does not set them to MMC1 mode.
I have tried changing the device tree as described here:

https://stackoverflow.com/questions/44702426/how-to-setup-an-own-device-tree-for-a-raspberrypi-in-yocto

That compiles and add the .dtbo to my build, but still the GPIOS are not
set to MMC1 mode.

cat /sys/kernel/debug/pinctrl/*gpio*/pinmux-pins
Pinmux settings per pin
Format: pin (name): mux_owner gpio_owner hog?
....

pin 22 (gpio22): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 23 (gpio23): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 24 (gpio24): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 25 (gpio25): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 26 (gpio26): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 27 (gpio27): (MUX UNCLAIMED) (GPIO UNCLAIMED)

.....

I have looked at:

https://ralimtek.com/raspberry%20pi/electronics/software/raspberry_pi_secondary_sd_card/


Any ideas of where to look next to turn on the sdio would be appreciated!


what does /boot/config.txt look like on raspbian and yocto built images

Chuck
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