Raspberry Pi Forums

It's there, but it's called BSC (Broadcom Serial Communications, I think) - it's a licencing thing.

Running "i2cdetect -l" (lowercase L) will show you a less comprehensive, less readable version of that answer.

If you are only interested in UARTs accessible from the 40-pin header then the answer is 5, for the reason you gave. Bluetooth will make use of the other, inaccessible UART, but not WiFi.

That message is just reporting that the firmware hasn't detected any cameras, and therefore not automatically loaded any camera overlays. This isn't surprising - it has no way to know what is a camera except for the ones it has been specifically told about, i.e. the first-party cameras. Once you've ...

The rpi-imager net installer that kerry_s refers to is built into the EEPROM bootloader (or at least the means to download it are) - just hold down the Shift key on a USB keyboard when you power it on.

On Pi 3 you would add "dtparam=sd_overclock=100" (or a number of your choice) to set the SDIO bus speed to (say) 100MHz. This is totally out of spec for a bog standard SD card but some could cope with it. Note that there are limited clock speeds available due to a requirement for integer d...

Hmmm, I just saw Gordon's SSD-equipped Pi 5 boot to desktop in about 10s - perhaps my SD card is just too basic or knackered. If I have a message now it's that your mileage may vary, but it feels much snappier than a Pi 4.

I don't know where that 7s figure came from, but that seems totally unrealistic. BL31, the Pi 5 version of the old armstubs, only starts at around 7-8 seconds, and on a vanilla system I get to a usable desktop image (and serial console) in just under 20 seconds. Booting to console on the normal imag...

The manufacturer of the hardware you are using.

Boot from SPI on a 3B+? Are you sure? The boot order is fixed in the ROM, and if Nand boot is enabled it happens before the SD card. Your best bet might be to work out which GPIOs are being used to SPI boot and forcibly pull the lines high. Do try and avoid setting OTP bits - even if you find the ri...

You misunderstand. The lower of the two commits is the new HEAD, which is the point at which the tests passed (hence the green tick), but both have been merged - see https://github.com/raspberrypi/linux/commits/rpi-6.5.y.

Now I'm confused! https://github.com/raspberrypi/linux/pu ... 04ee23272e is not stated in the merge.

Pardon?

That patch is now merged to rpi-6.5.y.

While this is fresh in my memory I'm looking at rpi-6.6.y because the hysteresis support was dropped due to upstream changes.

An easier method would be to simply place the normal install image on a USB stick, but how would I get the system to boot from the USB stick in preference to the SSD? You can edit the EEPROM configuration settings to change the boot order using "sudo rpi-eeprom-config --edit" before reboo...

Got it - there's an uninitialised variable in the hysteresis support. Here's a Pull Request for a fix in our rpi-6.5.y branch: https://github.com/raspberrypi/linux/pull/5617 If you wait an hour you should be able to install a trial fix with "sudo rpi-update pulls/5617". Alternatively you c...

PWM fan control seems to have been broken in rpi-6.3.y - it still works in rpi-6.2.y. The effect is that cooling device is permanently in state 4, i.e. with the fan running full speed.

Digging deeper...

If it's working now then I'm not going to investigate further.

Yes - use the GITHUB_API_TOKEN variable: https://github.com/Hexxeh/rpi-update#github_api_token

With exactly the same config.txt as you I get all 5 spidev entries: pi@raspberrypi:~ $ ls /dev/spidev* /dev/spidev0.0 /dev/spidev0.1 /dev/spidev1.0 /dev/spidev1.1 /dev/spidev1.2 The fact that GPIOs 9-11 and 19-21 are being used by the SPI drivers doesn't show up in /sys/kernel/debug/gpio: pi@raspber...

I can't readily explain that. What else have you added to config.txt?

The easiest way is to get udev to change the permissions for you. In an ideal world you would create a new group - "leds", say - arranging that the user belongs to it and that the /sys/class/leds entries are owned by it. We can make life easier for ourselves by reusing an existing group wh...

So there's no misunderstanding, the firmware in our rpi-firmware repo (which is installed by "sudo rpi-update") does include support for the HAT map but does not include the HAT map itself - you'll need to add it from the Google drive link above.

Note that if you have access to rpi-update in Recalbox then you can now run "sudo rpi-update pulls/5610" to install the latest kernel including the mapping for your HAT.

i2c10 is the numeric ID for I2C0 on the camera GPIOs, but in DT it's called "i2c_csi_dsi". You can probably get over many hurdles like this by reading one of the existing camera overlays, e.g. https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/imx708-overlay.dts...

Documentation is available on all the overlays: pi@raspberrypi:~$ dtoverlay -h spi1-3cs Name: spi1-3cs Info: Enables spi1 with three chip select (CS) lines and associated spidev dev nodes. The gpio pin numbers for the CS lines and spidev device node creation are configurable. N.B.: spi1 is only acce...

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Re: Kernel 6.5.5 - PWM fan control via hwmon no longer working

Re: Kernel 6.5.5 - PWM fan control via hwmon no longer working

Re: Kernel 6.5.5 - PWM fan control via hwmon no longer working

Re: Simplest way to do a fresh install on /dev/sda

Re: Kernel 6.5.5 - PWM fan control via hwmon no longer working

Re: Kernel 6.5.5 - PWM fan control via hwmon no longer working

Re: what is /dev/spidev0.1 and where is SPI1?

Re: github credentials for rpi-update

Re: what is /dev/spidev0.1 and where is SPI1?

Re: what is /dev/spidev0.1 and where is SPI1?

Re: Permission denied - /sys/class/leds/led0/trigger

Re: Kernel 6.1 and dts: brcm,disable-headphones removed

Re: Kernel 6.1 and dts: brcm,disable-headphones removed

Re: Adding a new i2c image sensor to RPI 4B

Re: what is /dev/spidev0.1 and where is SPI1?