On Feb 11, 2014, at 2:57 PM, Stephen N Chivers <schivers@xxxxxxxxxx> wrote:
> I have been trial booting a 3.14-rc2 kernel for a 85xx platform
> (dtbImage).
>
> After mounting the root filesystem there are no messages from the init
> scripts
> and the serial console is not available for login.
>
> In the kernel log messages there is:
>
> of_serial f1004500.serial: Unknown serial port found, ignored.
>
> The serial nodes in boards dts file are specified as:
>
> serial0: serial@4500 {
> cell-index = <0>;
> device_type = "serial";
> compatible = "fsl,ns16550", "ns16550";
> reg = <0x4500 0x100>;
> clock-frequency = <0>;
> interrupts = <0x2a 0x2>;
> interrupt-parent = <&mpic>;
> };
>
> Reversing the order of the compatible:
>
> compatible = "ns16550", "fsl,ns16550";
>
> restores the serial console.
>
> Linux-3.13 does not have this behaviour.
>
> There are 49 dts files in Linux-3.14-rc2 that have the fsl,ns16550
> compatible first.
Hmm,
Wondering if this caused the issue:
commit 105353145eafb3ea919f5cdeb652a9d8f270228e
Author: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
Date: Tue Dec 3 14:52:00 2013 +0100
OF: base: match each node compatible against all given matches first
- k
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