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by swahren
Sun Sep 08, 2019 4:35 pm
Forum: Compute Module
Topic: SPI2 set clock divider with iotcl
Replies: 4
Views: 133

Re: SPI2 set clock divider with iotcl

Why you don't use a fbtft driver for the ili9225?
by swahren
Thu Aug 29, 2019 7:05 pm
Forum: Linux Kernel
Topic: Status of Raspberry Pi 4 in Mainline
Replies: 1
Views: 576

Re: Status of Raspberry Pi 4 in Mainline

Today the relevant I2C changes has been applied to for-next:
https://marc.info/?l=linux-i2c&m=156692552019278
by swahren
Tue Aug 27, 2019 8:45 pm
Forum: Deutsch
Topic: Sensordaten parallel abfragen
Replies: 4
Views: 292

Re: Sensordaten parallel abfragen

Das geschilderte Problem hat eigentlich nichts mit dem Raspberry Pi zu tun, deshalb solltest Du besser in ein Linux/Programmierer-Forum schauen. Damit jemand Dir dort helfen kann solltest Du folgende Fragen beantworten (können): Welche Programmiersprache verwendest Du? Welche Schnittstelle aus Linux...
by swahren
Fri Aug 23, 2019 3:52 pm
Forum: Deutsch
Topic: PI4 don' start from ODroid SD EMMC Adapter
Replies: 7
Views: 1038

Re: PI4 don' start from ODroid SD EMMC Adapter

Wie es aussieht hat jemand das Problem schon näher analysiert:
https://github.com/raspberrypi/linux/issues/3178
by swahren
Thu Aug 22, 2019 6:33 pm
Forum: Linux Kernel
Topic: Status of Raspberry Pi 4 in Mainline
Replies: 1
Views: 576

Status of Raspberry Pi 4 in Mainline

For those how are interested, Nicolas Saenz Julienne and i working on Mainline support for the Raspberry Pi 4. The plan was to introduce initial Raspberry Pi 4 support (only debug UART, no fancy stuff like GENET, V3D, USB 3.0 or arm64) for Linux 5.4. Unfortunately there were a lot of issues (especia...
by swahren
Sun Aug 18, 2019 3:15 pm
Forum: Deutsch
Topic: Pi mit Rasp 9 oder 10 Netzwerkprobleme, Rasp 8 OK
Replies: 13
Views: 1823

Re: Pi mit Rasp 9 oder 10 Netzwerkprobleme, Rasp 8 OK

D.h. das Problem / Crash ist relativ einfach nach Zeit x reproduzierbar? Wie schnell?

Edit: Hast Du schon mal die Systemlast mit den anderen RPi verglichen?
by swahren
Sat Aug 17, 2019 6:37 am
Forum: Deutsch
Topic: Pi mit Rasp 9 oder 10 Netzwerkprobleme, Rasp 8 OK
Replies: 13
Views: 1823

Re: Pi mit Rasp 9 oder 10 Netzwerkprobleme, Rasp 8 OK

Ist der Raspberry Pi aus dem Internet erreichbar?

Edit: Swap ist auf der SD Karte angelegt?
by swahren
Wed Jul 31, 2019 6:11 pm
Forum: Deutsch
Topic: PI4 don' start from ODroid SD EMMC Adapter
Replies: 7
Views: 1038

Re: PI4 don' start from ODroid SD EMMC Adapter

Ich glaube mahjongg hat Dein Problem falsch verstanden. Nach meinem Verständnis gibt es zwei offensichtliche Fehlerursachen: 1) der neue Bootloader kommt nicht mit eMMCs klar (andere Befehle) 2) die neue MMC-Schnittstelle läuft mit einer höheren Datenrate möglicherweise wird durch den Adapter das Si...
by swahren
Sun Jul 28, 2019 12:25 pm
Forum: Bare metal, Assembly language
Topic: Status of U-Boot Support for Pi 4
Replies: 5
Views: 1165

Re: Status of U-Boot Support for Pi 4

The U-Boot guys are waiting for the results of the Linux upstreaming process.

But don't expect network or USB boot too soon. AFAIK there are no driver available.
by swahren
Sun Jul 07, 2019 10:51 am
Forum: Troubleshooting
Topic: u-boot port on RaspberryPi 4
Replies: 15
Views: 1244

Re: u-boot port on RaspberryPi 4

Honestly i didn't expect a u-boot port thread in Troubleshooting. I started to work on the upstream work for the Linux kernel and i hope this helps for the u-boot port: https://github.com/lategoodbye/rpi-zero/issues/43 (Don't ask about the confusing repo name i'm just to lazy to create a new one :mr...
by swahren
Fri Jul 05, 2019 3:04 pm
Forum: Raspbian
Topic: Pi 4 Raspbian Buster PEAP connection failed
Replies: 10
Views: 1698

Re: Pi 4 Raspbian Buster PEAP connection failed

Do you have this kernel warning?
What version of wpa_supplicant do you have?
by swahren
Tue Jul 02, 2019 5:04 pm
Forum: Raspbian
Topic: Buster bug report thread
Replies: 217
Views: 25776

Re: Buster bug report thread

Using gpiod / libgpiod, what is reported by the gpiod related commands is not the same as reported by the gpio utility. here the UART (14,15) has been enabled for userland use with enable_uart=1 This is a kernel / pinctrl issue. I cannot promise this will be fixed in mainline, but you can look at t...
by swahren
Tue Jul 02, 2019 4:56 pm
Forum: Raspbian
Topic: Buster bug report thread
Replies: 217
Views: 25776

Re: Buster bug report thread

I found myself needing to re-image an SD that I've been using on a Pi Zero-W yesterday and found that Buster was the current available image. FWIW, I use the "lite" image and after imaging I put my standard wpa_supplicanf.conf file in boot along with and SSH file so I can do a headless setup and on...
by swahren
Wed Jun 26, 2019 9:16 pm
Forum: Troubleshooting
Topic: VCHIQ Not Working
Replies: 3
Views: 675

Re: VCHIQ Not Working

This looks like you are running a upstream DTB with a downstream kernel.
by swahren
Mon Apr 08, 2019 5:42 pm
Forum: General discussion
Topic: GIVE YOUR RASPBERRY PI SD CARD A BREAK: LOG TO RAM
Replies: 19
Views: 5300

Re: GIVE YOUR RASPBERRY PI SD CARD A BREAK: LOG TO RAM

The ext4 file system already provide such a mechanism. As per default the data will be cached for 5 sec before writing. The delay is adjustable via "commit" parameter.

https://www.kernel.org/doc/Documentatio ... s/ext4.txt
by swahren
Sat Apr 06, 2019 5:07 pm
Forum: Troubleshooting
Topic: TP link Archer T2U AC600 not working
Replies: 13
Views: 1355

Re: TP link Archer T2U AC600 not working

This may help unless someone comes up with a better fix as it’s a bit old https://askubuntu.com/questions/674116/how-to-install-tp-link-t2uh-wireless-adapter-driver-ralink-mt7610u The usb ID from the report is a solid match though the model is different. No, please don't do this. The driver is avai...
by swahren
Fri Mar 29, 2019 5:23 pm
Forum: Linux Kernel
Topic: Is mainline kernel perfectly good for Raspberry Pi 3 B+?
Replies: 8
Views: 3075

Re: Is mainline kernel perfectly good for Raspberry Pi 3 B+?

Do I still need to use https://github.com/raspberrypi/linux? No, you don't have to, but it isn't perfectly good. At the end this comes to a more philosophical question, what is perfect. The advantage of a vendor tree is to hack a lot of optimizations for your target device, which will never accepta...
by swahren
Mon Mar 25, 2019 8:57 pm
Forum: Advanced users
Topic: GPIO c/c++ static library
Replies: 2
Views: 344

Re: GPIO c/c++ static library

According to the configure help the libgpiod should be able to build static:
https://git.kernel.org/pub/scm/libs/lib ... gpiod.git/

This requires the GPIO character device interface.
by swahren
Tue Feb 26, 2019 8:21 pm
Forum: Advanced users
Topic: Moving Linux kernel to 4.19
Replies: 258
Views: 78695

Re: Moving Linux kernel to 4.19

Because of the many complains about broken AP mode, i want to link to my post from November: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=224931&start=25#p1396409 Since this won't be fixed in mainline, we have two options: 1) update hostapd to a more recent version (e.g. from Buster) 2) r...
by swahren
Sat Jan 26, 2019 1:10 pm
Forum: Advanced users
Topic: Reset i2c bus?
Replies: 1
Views: 905

Re: Reset i2c bus?

Method 1 is called I2C recovery in the Linux kernel. Unfortunately the i2c driver for bcm2835 doesn't implement this feature yet.

https://www.kernel.org/doc/html/v4.19/d ... overy_info
by swahren
Sat Dec 15, 2018 3:26 pm
Forum: Advanced users
Topic: Where is the git repo with commits for VC4 death spiral?
Replies: 3
Views: 659

Re: Where is the git repo with commits for VC4 death spiral?

The author of the DMA pool patch didn't had the time to upstream the patch. But i could prepare a upstream git repo for testing.
by swahren
Fri Dec 14, 2018 6:12 pm
Forum: Device Tree
Topic: Review: Upstream RPI 3 A+ DTS
Replies: 1
Views: 1907

Review: Upstream RPI 3 A+ DTS

Hi,
since the RPI 3 A+ was released to late for Upstream Linux 4.21/5.0, i don't want to miss the next merge window for device tree sources.

So i would be glad to get a short review of this patch:
ARM: dts: add Raspberry Pi 3 A+

Regards Stefan
by swahren
Sun Dec 09, 2018 1:27 pm
Forum: Compute Module
Topic: eMMC flash memory reliability
Replies: 12
Views: 5642

Re: eMMC flash memory reliability

But how can we know for sure that eMMC really uses MLC (or maybe eMLC) and SD cards use TLC? Couldn't find any information about that. Just look at the part number of the eMMC chip and search for the datasheet. Btw there are also SLC SD cards, but they are very expensive and have a very low density...
by swahren
Sun Nov 25, 2018 12:45 pm
Forum: Advanced users
Topic: Moving Linux kernel to 4.19
Replies: 258
Views: 78695

Re: Moving Linux kernel to 4.19

Hi, this weekend i wanted to setup an access point on my Raspberry Pi 3 A+ using builtin wifi with a recent kernel. Unfortunately the hostapd 2.4 shipped with Raspbian Stretch failed with Linux 4.18 and newer: rfkill: initial event: idx=0 type=2 op=0 soft=0 hard=0 rfkill: initial event: idx=1 type=1...

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