u-boot.git/drivers/serial, branch master

Merge patch series "serial: goldfish: Add debug uart support"

2026-04-14T19:25:32Z

This series from Daniel Palmer improves debug UART support on QEMU on M68K by adding debug uart support to the serial driver. Link: https://lore.kernel.org/r/20260309105110.672832-1-daniel@0x0f.com

serial: goldfish: Add debug uart support

2026-04-14T19:25:13Z

Add debug support for the goldfish tty so it can be used for early debugging. This will be really useful when adding support for relocation to the m68k qemu virt machine. Signed-off-by: Daniel Palmer Reviewed-by: Kuan-Wei Chiu Tested-by: Kuan-Wei Chiu

serial: sh: Handle HSCIF on all 64-bit R-Car SoC

2026-04-08T17:36:28Z

The HSCIF variant present on Renesas R-Car Gen5 SoC is compatible with the HSCIF variant present on Renesas R-Car Gen4 SoC. Enable HSSRR register programming for HSCIF present on all 64-bit R-Car SoCs, which covers R-Car Gen3, Gen4 and newly also Gen5. Signed-off-by: Marek Vasut

serial: omap: Fix "unused" warnings with SERIAL_PRESENT=n and OF_REAL=y

2026-04-07T17:32:49Z

The definition of our ID table (and of_to_plat function) is guarded with OF_REAL however the U_BOOT_DRIVER that would in turn use the table is guarded with SERIAL_PRESENT. To avoid a potential warning we must also guard both with SERIAL_PRESENT. Signed-off-by: Tom Rini

serial: ns16550: Fix an "unused" warning with SERIAL_PRESENT=n and OF_REAL=y

2026-04-07T17:32:46Z

The definition of our ID table is guarded with OF_REAL however the U_BOOT_DRIVER that would in turn use the table is guarded with SERIAL_PRESENT. To avoid a potential warning we must also guard the ID table with SERIAL_PRESENT. Signed-off-by: Tom Rini

Merge branch 'next'

2026-04-06T18:16:57Z

serial: pl011: Remove legacy serial driver options

2026-04-02T17:13:16Z

There are no longer any users of the legacy non-DM pl01x serial driver. This lets us remove both CONFIG_PL011_SERIAL as well as CONFIG_PL011_SERIAL_RLCR references. We still have SPL users of the non-DM portions of the code. Signed-off-by: Tom Rini

serial: msm-geni: allow invalid clock

2026-03-24T10:49:17Z

Pre-relocation we may not have a clock but it's usually been enabled for us already, or worst case we will enable it after relocation. Erroring out in this case will almost always cause U-Boot to hang pre-relocation which is undesirable and may be hard to debug. Link: https://patch.msgid.link/20260320-casey-qcom-rpmh-serial-fixes-v1-1-b81d05832eec@linaro.org Signed-off-by: Casey Connolly

serial: ns16550: Fix return-type warning

2026-03-13T19:21:59Z

Fix compiler warning: drivers/serial/ns16550.c: In function ‘serial_in_dynamic’: drivers/serial/ns16550.c:153:1: warning: control reaches end of non-void function [-Wreturn-type] 153 | } | ^ Observed with gcc 15.2.1: $ riscv64-unknown-linux-gnu-gcc --version riscv64-unknown-linux-gnu-gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 Fixes: 62cbde4c4e46 ("serial: ns16550: Support run-time configuration") Signed-off-by: Nikita Shubin Reviewed-by: Tom Rini

Merge tag 'v2026.04-rc4' into next

2026-03-09T21:26:34Z

Prepare v2026.04-rc4