[PATCH 08/18] serial: add uart driver for MediaTek MT7620 SoC

[Simon Glass]

Hi Weijie,

On Fri, 16 Oct 2020 at 01:36, Weijie Gao <weijie.gao at mediatek.com> wrote:
>
> This patch adds uart support for MediaTek MT7620 and earlier SoCs.
>
> The UART used by MT7620 is incompatible with the ns16550a driver.
> All registers of this UART have different addresses. A special 16-bit
> register for Divisor Latch is used to set the baudrate instead of the
> original two 8-bit registers (DLL and DLM).
>
> The driver can be built without DM which is useful for tiny SPL.
>
> Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
> ---
>  drivers/serial/Kconfig         |  20 ++
>  drivers/serial/Makefile        |   1 +
>  drivers/serial/serial.c        |   2 +
>  drivers/serial/serial_mt7620.c | 350 +++++++++++++++++++++++++++++++++
>  4 files changed, 373 insertions(+)
>  create mode 100644 drivers/serial/serial_mt7620.c

Why do you need to build without DM? We have of-platdata which
provides for smaller images. What is the SRAM size available?

Regards,
Simon