On 14 November 2018 at 18:08, Ryder Lee ryder.lee@mediatek.com wrote:
Many SoCs from MediaTek have a high-speed uart. This UART is compatible with the ns16550 in legacy mode. It has extra registers for high-speed mode which can reach a maximum baudrate at 921600.
However this UART will no longer be compatible if it's in high-speed mode. Some BootROM of MediaTek's SoCs will change the UART into high-speed mode and the U-Boot must use this driver to initialize the UART.
Signed-off-by: Weijie Gao weijie.gao@mediatek.com Tested-by: Ryder Lee ryder.lee@mediatek.com
Changes since v5: Add a specific driver for MTK UART Changes since v4: None
drivers/serial/Kconfig | 20 ++++ drivers/serial/Makefile | 1 + drivers/serial/serial_mtk.c | 268 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 289 insertions(+) create mode 100644 drivers/serial/serial_mtk.c
Reviewed-by: Simon Glass sjg@chromium.org