Looks like RPI W is wired the same way as RPI3. I think for the RPI Zero W you'll need two additional lines: #define BCM2835_MINIUART_BASE 0x20215040 and clkdev_add_physbase(clk, BCM2835_MINIUART_BASE, NULL); in rpi_console_clock_init. These should enable the clkdev for the uart and should barebox allow to probe the miniuart on RPI Zero W. Don't forget to remove the uart_2ndstage=1, this line also switches PL011 and the miniuart. - Emantor On Tue, 2019-01-15 at 12:01 +0100, Roland Hieber wrote: > Hi, > > just a short notice, I tested in on my small board farm, RPi 1 and > RPi 3 > boot okay, but RPi Zero W doesn't show a barebox prompt. When > enabling > uart_2ndstage=1 in config.txt, the firmware hangs after > > MESS:00:00:02.864061:0: uart: Baud rate change done... > MESS:00:00:02.867490:0: uart: Baud rate > > The docs don't claim that we officially to support that board > though... :P > > - Roland > > On Tue, Jan 15, 2019 at 06:44:00AM +0100, Rouven Czerwinski wrote: > > This patch series adds support for the raspberry pi miniuart (also > > called > > aux-uart) to barebox. > > With this series the miniuart overlay is no longer necessary to > > start barebox on > > Raspberry Pi 3. > > > > v6: > > - Remove leftover val and missing fixup of the AUX Clock defines > > > > v5: > > - Add defines for register and base values > > from Sascha Hauer and Roland Hieber > > > > v4: > > - Fix indentation for compatible > > - Fix __maybe_unused annnotation for rpi_drvdata missed in v3 > > from Sascha Hauer > > > > v3: > > - Fix Indentation > > from Oleksij Rempel and Sascha Hauer > > > > v2: > > - Move console clock initialization into board core > > - Retrieve the core clock frequency for the miniuart from the > > firmware > > - Double the clock frequency in the ns16550 rpi init function > > instead of > > during initialization > > from Lucas Stach > > > > Rouven Czerwinski (9): > > ARM: rpi: fix typo in rpi-common.c > > ARM: rpi: move clks into board specific rpi-common > > ARM: rpi: retrieve miniuart clock from firmware > > serial_ns16550: handle default reg-io-width > > serial_ns16550: add raspberry pi compatible and init > > ARM: rpi: add NS16550 support > > ARM: rpi: choose miniuart as stdout > > doc: bcm283x: remove miniuart overlay instruction > > ARM: rpi: use defines for uart bases > > > > Documentation/boards/bcm2835.rst | 1 +- > > arch/arm/boards/raspberry-pi/rpi-common.c | 34 ++++++++++- > > arch/arm/configs/rpi_defconfig | 1 +- > > arch/arm/dts/bcm2837-rpi-3.dts | 7 +-- > > arch/arm/mach-bcm283x/core.c | 19 +------ > > drivers/serial/serial_ns16550.c | 74 ++++++++++++++++--- > > ----- > > 6 files changed, 85 insertions(+), 51 deletions(-) > > > > base-commit: 0b5361a328632e64c14a54306119093a0c7fecdf > > -- > > git-series 0.9.1 > > > > _______________________________________________ > > barebox mailing list > > barebox@xxxxxxxxxxxxxxxxxxx > > http://lists.infradead.org/mailman/listinfo/barebox > > > > _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
