@@ -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";
The APM821XX/PPC460EX datasheet mentions: "Register compatibility with 16750 register set" Signed-off-by: Christian Lamparter <chunkeey@gmail.com> --- target/linux/apm821xx/dts/apm82181.dtsi | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)