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 <olek2@wp.pl>
Link: https://github.com/openwrt/openwrt/pull/20049
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/airoha/an7581/config-6.12 b/target/linux/airoha/an7581/config-6.12
index 431adea75930707d21b30ba90c87d6600b0e40b2..95011b1e3539614971ea86ae8e50065a59313406 100644 (file)
--- 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 600f1e45b47497d9c46f50e273fcf1417865dd02..a079241ad4a058b39d1e015be01b1ef5ee8bd71a 100644 (file)
--- 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 9ea355370bbd45a2711ca3d720e553b2e4e58a9e..39a4944daf758d6d86b615b29355eade48f42729 100644 (file)
--- 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