apm821xx: set uart compatible to ns16750
The APM821XX/PPC460EX datasheet mentions: "Register compatibility with 16750 register set" Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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1 changed files with 11 additions and 6 deletions
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@ -306,24 +306,29 @@
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};
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UART0: serial@ef600300 {
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device_type = "serial";
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compatible = "ns16550";
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/*
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* AMCC's BSP u-boot scans for the "ns16550"
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* compatible, without it, u-boot wouldn't
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* set the "clock-frequency" which is required.
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*
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* However, the hardware documentation lists:
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* "Register compatibility with 16750 register set"
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*/
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compatible = "ns16750", "ns16550";
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reg = <0xef600300 0x00000008>;
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virtual-reg = <0xef600300>;
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clock-frequency = <0>; /* Filled in by U-Boot */
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current-speed = <0>; /* Filled in by U-Boot */
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interrupt-parent = <&UIC1>;
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interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>;
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status = "disabled";
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};
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UART1: serial@ef600400 {
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device_type = "serial";
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compatible = "ns16550";
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/* same "ns16750" as with UART0 */
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compatible = "ns16750", "ns16550";
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reg = <0xef600400 0x00000008>;
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virtual-reg = <0xef600400>;
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clock-frequency = <0>; /* Filled in by U-Boot */
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current-speed = <0>; /* Filled in by U-Boot */
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interrupt-parent = <&UIC0>;
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interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>;
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status = "disabled";
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