On Fri, 30 Oct 2020 at 03:34, Weijie Gao weijie.gao@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 supports of-platdata which is useful for tiny SPL.
Signed-off-by: Weijie Gao weijie.gao@mediatek.com
v2 changes: replace non-DM code with of-platdata
drivers/serial/Kconfig | 20 +++ drivers/serial/Makefile | 1 + drivers/serial/serial.c | 2 + drivers/serial/serial_mt7620.c | 246 +++++++++++++++++++++++++++++++++ 4 files changed, 269 insertions(+) create mode 100644 drivers/serial/serial_mt7620.c
Reviewed-by: Simon Glass sjg@chromium.org