On Wed, Jun 10, 2026 at 11:57:20AM +1000, Sam Day via B4 Relay wrote: > From: Sam Day <[email protected]> > > The dragonboard410c (and likely other SB-off devices) can run U-Boot > early enough in the boot chain such that UART clock isn't started, and > pins aren't configured. > > APQ8016 has two UART peripherals, each with its own clock and TLMM pins. > > Two new debug-apq8016-uartN.config fragments are provided. Each > configures the appropriate UARTDM aperture. The newly introduced > DEBUG_UART_APQ8016 Kconfig symbol pulls in MSM debug UART, and enables a > board-level debug_uart_init function to start the right clock and mux > the right TX pin. > > Signed-off-by: Sam Day <[email protected]> > --- > Changes in v2: > - Rename APQ8016_TLMM_GPIO_ENABLE to APQ8016_TLMM_GPIO_OE > - Link to v1: > https://lore.kernel.org/r/[email protected] > --- > arch/arm/mach-snapdragon/Kconfig | 9 +++++++ > arch/arm/mach-snapdragon/Makefile | 1 + > arch/arm/mach-snapdragon/debug-uart-apq8016.c | 37 > +++++++++++++++++++++++++++ > board/qualcomm/debug-apq8016-uart1.config | 4 +++ > board/qualcomm/debug-apq8016-uart2.config | 4 +++ > drivers/serial/Kconfig | 1 + > drivers/serial/serial_msm.c | 10 -------- > 7 files changed, 56 insertions(+), 10 deletions(-) > > diff --git a/arch/arm/mach-snapdragon/Kconfig > b/arch/arm/mach-snapdragon/Kconfig > index d3de8693b5a..43e6fd1bc42 100644 > --- a/arch/arm/mach-snapdragon/Kconfig > +++ b/arch/arm/mach-snapdragon/Kconfig > @@ -1,5 +1,14 @@ > if ARCH_SNAPDRAGON > > +config DEBUG_UART_APQ8016 > + bool "APQ8016 early debug initialization" > + select CLK_QCOM_APQ8016 > + select CONFIG_DEBUG_UART_MSM
Should we have the CONFIG_ prefix here in Kconfig? Not sure if both works, but I'd expect this isn't required/typical here. Thanks, Stephan
