diff options
| -rw-r--r-- | target/linux/apm821xx/dts/apm82181.dtsi | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/target/linux/apm821xx/dts/apm82181.dtsi b/target/linux/apm821xx/dts/apm82181.dtsi index be8ace9207..79596da672 100644 --- a/target/linux/apm821xx/dts/apm82181.dtsi +++ b/target/linux/apm821xx/dts/apm82181.dtsi @@ -306,24 +306,29 @@ }; UART0: serial@ef600300 { - device_type = "serial"; - compatible = "ns16550"; + /* + * AMCC's BSP u-boot scans for the "ns16550" + * compatible, without it, u-boot wouldn't + * set the "clock-frequency" which is required. + * + * However, the hardware documentation lists: + * "Register compatibility with 16750 register set" + */ + compatible = "ns16750", "ns16550"; reg = <0xef600300 0x00000008>; virtual-reg = <0xef600300>; clock-frequency = <0>; /* Filled in by U-Boot */ - current-speed = <0>; /* Filled in by U-Boot */ interrupt-parent = <&UIC1>; interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>; status = "disabled"; }; UART1: serial@ef600400 { - device_type = "serial"; - compatible = "ns16550"; + /* same "ns16750" as with UART0 */ + compatible = "ns16750", "ns16550"; reg = <0xef600400 0x00000008>; virtual-reg = <0xef600400>; clock-frequency = <0>; /* Filled in by U-Boot */ - current-speed = <0>; /* Filled in by U-Boot */ interrupt-parent = <&UIC0>; interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>; status = "disabled"; |