kernel/linux.git/drivers/tty/serial/esp32_uart.c, branch v6.7Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.72023-10-21T16:26:14+00:00serial/esp32_uart: use prescaler when available2023-10-21T16:26:14+00:00Max Filippovjcmvbkbc@gmail.com2023-10-18T19:12:52+00:00urn:sha1:4bebd644971c2b5355af60f4828d464b3268e6cc
esp32s3 variant of the esp32 UART has limited baudrate divisor range
that does not allow it to use 9600 and lower rates with 40MHz input
clock. Use clock prescaler present in this UART variant to help with
that.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Link: https://lore.kernel.org/r/20231018191252.1551972-1-jcmvbkbc@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial: add driver for the ESP32 UART2023-10-16T18:17:29+00:00Max Filippovjcmvbkbc@gmail.com2023-10-10T08:59:24+00:00urn:sha1:8cc89a229aac8183ffd4c385de0b6b9543175eff
Add driver for the UART controllers of the Espressif ESP32 and ESP32S3
SoCs. Hardware specification is available at the following URLs:
https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf
(Chapter 13 UART Controller)
https://www.espressif.com/sites/default/files/documentation/esp32-s3_technical_reference_manual_en.pdf
(Chapter 26 UART Controller)
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Link: https://lore.kernel.org/r/20231010085926.1021667-4-jcmvbkbc@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>