From: Aleksander Jan Bajkowski Date: Sun, 14 Sep 2025 15:38:24 +0000 (+0200) Subject: airoha: an7581: enable uart baudrate control X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=440b85f5b1025d26b3a40d6b55b34b17cb6520c8;p=thirdparty%2Fopenwrt.git airoha: an7581: enable uart baudrate control The baud rate control on Airoha does not function properly. This patch enables the inactive code responsible for this. The UART2 baud rate is correct. HSUART3 operates at twice the requested baud rate. The same problem exists in the current code, so this doesn't introduce any regression. Support for baud rates higher than 460800 is still required. This will be added in the future. Tested on Gemtek W1700k. UART2 and HSUART3 are working fine. Signed-off-by: Aleksander Jan Bajkowski Link: https://github.com/openwrt/openwrt/pull/20049 Signed-off-by: Robert Marko --- diff --git a/target/linux/airoha/an7581/config-6.12 b/target/linux/airoha/an7581/config-6.12 index 431adea7593..95011b1e353 100644 --- a/target/linux/airoha/an7581/config-6.12 +++ b/target/linux/airoha/an7581/config-6.12 @@ -331,6 +331,7 @@ CONFIG_RODATA_FULL_DEFAULT_ENABLED=y CONFIG_RPS=y CONFIG_RTL8261N_PHY=y CONFIG_RWSEM_SPIN_ON_OWNER=y +CONFIG_SERIAL_8250_AIROHA=y CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_FSL=y CONFIG_SERIAL_8250_NR_UARTS=5 diff --git a/target/linux/airoha/an7581/config-6.6 b/target/linux/airoha/an7581/config-6.6 index 600f1e45b47..a079241ad4a 100644 --- a/target/linux/airoha/an7581/config-6.6 +++ b/target/linux/airoha/an7581/config-6.6 @@ -310,6 +310,7 @@ CONFIG_RFS_ACCEL=y CONFIG_RODATA_FULL_DEFAULT_ENABLED=y CONFIG_RPS=y CONFIG_RWSEM_SPIN_ON_OWNER=y +CONFIG_SERIAL_8250_AIROHA=y CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_FSL=y CONFIG_SERIAL_8250_NR_UARTS=5 diff --git a/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch b/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch index 9ea355370bb..39a4944daf7 100644 --- a/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch +++ b/target/linux/airoha/patches-6.6/105-uart-add-en7523-support.patch @@ -135,6 +135,25 @@ /* * LCR DLAB must be set to enable 64-byte FIFO mode. If the FCR * is written without DLAB set, this mode will be disabled. +--- a/drivers/tty/serial/8250/Kconfig ++++ b/drivers/tty/serial/8250/Kconfig +@@ -354,6 +354,16 @@ config SERIAL_8250_ACORN + system, say Y to this option. The driver can handle 1, 2, or 3 port + cards. If unsure, say N. + ++config SERIAL_8250_AIROHA ++ tristate "Airoha UART support" ++ depends on (ARCH_AIROHA || COMPILE_TEST) && OF && SERIAL_8250 ++ help ++ Selecting this option enables an Airoha SoC specific baud rate ++ calculation routine on an otherwise 16550 compatible UART hardware. ++ ++ If you have an Airoha based board and want to use the serial port, ++ say Y to this option. If unsure, say N. ++ + config SERIAL_8250_BCM2835AUX + tristate "BCM2835 auxiliar mini UART support" + depends on ARCH_BCM2835 || COMPILE_TEST --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_SERIAL_8250_PERICOM) += 825