[PATCH 09/11] Kconfig: serial: Depend on correct xPL symbol

[Tom Rini]

On Thu, Jul 09, 2026 at 09:27:07AM +0200, Jonas Karlman wrote:
> Hi Tom,
> 
> On 7/9/2026 3:53 AM, Tom Rini wrote:
> > On Wed, Jul 08, 2026 at 10:05:35PM +0000, Jonas Karlman wrote:
> > 
> >> Change xPL_SERIAL_PRESENT symbols to depend on the xPL_DM_SERIAL symbol
> >> intended for the related xPL phase instead of the DM_SERIAL symbol
> >> used for U-Boot proper to make CONFIG_IS_ENABLED(SERIAL_PRESENT) guards
> >> work as intended.
> >>
> >> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
> >> ---
> >>  drivers/serial/Kconfig | 6 +++---
> >>  1 file changed, 3 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
> >> index e221800d5d06..f125061fe184 100644
> >> --- a/drivers/serial/Kconfig
> >> +++ b/drivers/serial/Kconfig
> >> @@ -71,7 +71,7 @@ config SERIAL_PRESENT
> >>  
> >>  config SPL_SERIAL_PRESENT
> >>  	bool "Provide a serial driver in SPL"
> >> -	depends on DM_SERIAL && SPL
> >> +	depends on SPL_DM_SERIAL
> >>  	default y
> >>  	help
> >>  	  In very space-constrained devices even the full UART driver is too
> > 
> > Using the database option to qconfig.py, this is not equivalent. There's
> > 901 platforms today that enable SPL_SERIAL_PRESENT, and 344 that enable
> > SPL_SERIAL_PRESENT but not SPL_DM_SERIAL. Now it's possible that there's
> > no functional change here. Something like "pinetab" would be a single
> > platform to check the size changes on as it's SPL_SERIAL_PRESENT=y and
> > SPL_DM_SERIAL=n.
> > 
> 
> This discrepancy is likely due to the 'default y' and the strange
> 'depend on', based on my observation xPL_SERIAL_PRESENT is mostly used
> to guard U_BOOT_DRIVER() and other DM related functions, so I do not
> expect any functional change after these changes.
> 
> Also did quick build tests of pinetab_defconfig and there was no binary
> change to spl/ before or after this series.

OK, good to know, thanks. I'll grab the series and do the world build
before/after test.

-- 
Tom
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