From 143463fd33fe0abc13fbb93236b060ee9b73d5cb Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Mon, 18 May 2020 10:11:01 +0800 Subject: [PATCH] MIPS: Loongson: Enable devicetree based probing for 8250 ports in defconfig After commit 87fcfa7b7fe6 ("MIPS: Loongson64: Add generic dts"), there already exists the node and property of Loongson CPU UART0 in loongson3-package.dtsi: cpu_uart0: serial@1fe001e0 { compatible = "ns16550a"; reg = <0 0x1fe001e0 0x8>; clock-frequency = <33000000>; interrupt-parent = <&liointc>; interrupts = <10 IRQ_TYPE_LEVEL_HIGH>; no-loopback-test; }; In order to support for serial console on the Loongson platform, add CONFIG_SERIAL_OF_PLATFORM=y to loongson3_defconfig. With this patch, we can see the following boot messages: [ 1.877745] printk: console [ttyS0] disabled [ 1.881979] 1fe001e0.serial: ttyS0 at MMIO 0x1fe001e0 (irq = 16, base_baud = 2062500) is a 16550A [ 1.890838] printk: console [ttyS0] enabled And also, we can login normally from the serial console. Signed-off-by: Tiezhu Yang Reviewed-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer --- arch/mips/configs/loongson3_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig index 4df24343e8ba..3d4c7e9996c5 100644 --- a/arch/mips/configs/loongson3_defconfig +++ b/arch/mips/configs/loongson3_defconfig @@ -217,6 +217,7 @@ CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_MANY_PORTS=y CONFIG_SERIAL_8250_SHARE_IRQ=y CONFIG_SERIAL_8250_RSA=y +CONFIG_SERIAL_OF_PLATFORM=y CONFIG_HW_RANDOM=y CONFIG_RAW_DRIVER=m CONFIG_I2C_CHARDEV=y -- 2.11.0