u-boot.git/drivers/serial, branch v2025.10-rc2

arm: imx: Remove the rest of i.MX31 support

2025-07-10T11:02:11Z

With the removal of the last i.MX31 platform we can remove the rest of the underlying architecture code as well. Fixes: f247354708ec ("arm: Remove mx31pdk board") Signed-off-by: Tom Rini Acked-by: Peng Fan

serial: mediatek: enable baudrate accuracy compensation

2025-06-05T20:30:35Z

The high-speed UART from MediaTek supports baudrate accuracy compensation when using high-speed mode 3. This is done by calculating the first digit of the fraction part of sample count value. The fraction value will be then used as the reference to insert 0 to 10 sample cycle(s) to one frame (assume that frame format is 8n1, i.e. 10 bits per frame). The fracdiv_[l/m] registers are used to determine whether a bit in one frame should be inserted with one sample cycle. With typical 40MHz source clock, the actual baudrates with/without accuracy compensation are: Ideal w/o compensation w/ compensation ======== ================ =============== 9600 9603 9600 115200 114942 115207 921600 930232 921659 3000000 3076923 3007519 Signed-off-by: Weijie Gao

serial: mediatek: fix register names and offsets

2025-06-05T20:30:35Z

Fix UART register names and offsets according to the programming guide to allow implementing some enhanced features. Signed-off-by: Weijie Gao

serial: Setup default base and frequency for Versal platforms

2025-04-16T11:42:06Z

Add useful default debug uart values for all Versal platforms to simplify and speed up debug uart enabling. The similar change has been done for Zynq/ZynqMP by commit ad55d99e3cc3 ("serial: Setup serial base and freq for zynq/zynqmp"). Signed-off-by: Michal Simek Link: https://lore.kernel.org/r/86edf3dbb6de16337aac36f5121f306f83149fc0.1741868624.git.michal.simek@amd.com

Merge patch series "Switch to using $(PHASE_) in Makefiles"

2025-04-11T18:16:49Z

Tom Rini says: This series switches to always using $(PHASE_) in Makefiles when building rather than $(PHASE_) or $(XPL_). It also starts on documenting this part of the build, but as a follow-up we need to rename doc/develop/spl.rst and expand on explaining things a bit. Link: https://lore.kernel.org/r/20250401225851.1125678-1-trini@konsulko.com

Kbuild: Always use $(PHASE_)

2025-04-11T18:16:44Z

It is confusing to have both "$(PHASE_)" and "$(XPL_)" be used in our Makefiles as part of the macros to determine when to do something in our Makefiles based on what phase of the build we are in. For consistency, bring this down to a single macro and use "$(PHASE_)" only. Signed-off-by: Tom Rini

Merge patch series "membuff: Add tests and update to support a flag for empty/full"

2025-04-03T22:54:59Z

Simon Glass says: The membuff implementation curently has no tests. It also assumes that head and tail can never correspond unless the buffer is empty. This series provides a compile-time flag to support a 'full' flag. It also adds some tests of the main routines. The data structure is also renamed to membuf which fits better with U-Boot. There may be some cases in the code which could be optimised a little, but the implementation is functional. Link: https://lore.kernel.org/r/20250318152059.1464369-1-sjg@chromium.org

membuff: Rename functions to have membuf_ prefix

2025-04-03T22:54:49Z

The double 'f' is not necessary and is a bit annoying as elsewhere in U-Boot we use 'buf'. Rename all the functions before it is used more widely. Signed-off-by: Simon Glass

serial: mxc: Support bulk enabling clocks

2025-03-19T16:17:21Z

Depending on the platform, there may be multiple clock sources required to enable a UART. Use the bulk functions to get and enable the clocks when the UART probes. This can facilitate the removal of functions to manually enable the clock. This is made dependent on CLK_CCF which is used on imx6q, imx8m[mnqp], several imxrt, imx9. If/when the UART clock registration is done for older boards, this limitation could be updated. Signed-off-by: Adam Ford Reviewed-by: Peng Fan

serial: Add missing TPL_SYS_NS16550_SERIAL symbol

2025-03-18T14:12:18Z

On PowerPC platforms with TPL enabled and SPL_SYS_NS16550_SERIAL enabled, today this builds under TPL as well due to how $(XPL_) is defined. Add the TPL_SYS_NS16550_SERIAL itself for consistency and clarity. Signed-off-by: Tom Rini