On Fri 25 Feb 2022 at 15:39, Yu Tu <yu.tu@xxxxxxxxxxx> wrote: > Using the common Clock code to describe the UART baud rate > clock makes it easier for the UART driver to be compatible > with the baud rate requirements of the UART IP on different > meson chips. Add Meson S4 SoC compatible. > > The test method: > Start the console and run the following commands in turn: > stty -F /dev/ttyAML0 115200 and stty -F /dev/ttyAML0 921600. > > Since most SoCs are too old, I was able to find all the platforms myself > such as Meson6, Meson8, Meson8b, GXL and so on. I only tested it with > G12A and S4. GXL based board are still very common an easy to come by. I'm quite surprised that you are unable to test on this SoC family > > Yu Tu (6): > tty: serial: meson: Move request the register region to probe > tty: serial: meson: Use devm_ioremap_resource to get register mapped > memory > tty: serial: meson: Describes the calculation of the UART baud rate > clock using a clock frame > tty: serial: meson: Make some bit of the REG5 register writable > tty: serial: meson: The system stuck when you run the stty command on > the console to change the baud rate > tty: serial: meson: Added S4 SOC compatibility > > V6 -> V7: To solve the system stuck when you run the stty command on > the console to change the baud rate. > V5 -> V6: Change error format as discussed in the email. > V4 -> V5: Change error format. > V3 -> V4: Change CCF to describe the UART baud rate clock as discussed > in the email. > V2 -> V3: add compatible = "amlogic,meson-gx-uart". Because it must change > the DTS before it can be deleted > V1 -> V2: Use CCF to describe the UART baud rate clock.Make some changes as > discussed in the email > > Link:https://lore.kernel.org/linux-amlogic/20220118030911.12815-4-yu.tu@xxxxxxxxxxx/ > > drivers/tty/serial/meson_uart.c | 221 ++++++++++++++++++++++---------- > 1 file changed, 154 insertions(+), 67 deletions(-) > > > base-commit: a603ca60cebff8589882427a67f870ed946b3fc8
