linux-kernel - Re: [PATCH Resend 1/2] ARC: [nsimosci] Change .dts to use generic 8250 UART

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Date:	Tue, 8 Apr 2014 13:41:50 +0000
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	"stable@...r.kernel.org" <stable@...r.kernel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH Resend 1/2] ARC: [nsimosci] Change .dts to use generic
 8250 UART

For Stable 3.10, 3.12, 3.13, 3.14

mainline commit 6eda477b3c54b8236868c8784e5e042ff14244f0

Thx,
-Vineet

On Saturday 05 April 2014 06:39 PM, Vineet Gupta wrote:
> From: Mischa Jonker <mjonker@...opsys.com>
>
> The Synopsys APB DW UART has a couple of special features that are not
> in the System C model. In 3.8, the 8250_dw driver didn't really use these
> features, but from 3.9 onwards, the 8250_dw driver has become incompatible
> with our model.
>
> Signed-off-by: Mischa Jonker <mjonker@...opsys.com>
> Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
> Cc: <stable@...r.kernel.org>   #3.10, 3.12, 3.13, 3.14
> Cc: Francois Bedard <Francois.Bedard@...opsys.com>
> ---
>  arch/arc/boot/dts/nsimosci.dts | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
> index ea16d782af58..8bd238c34c7d 100644
> --- a/arch/arc/boot/dts/nsimosci.dts
> +++ b/arch/arc/boot/dts/nsimosci.dts
> @@ -11,7 +11,7 @@
>  
>  / {
>  	compatible = "snps,nsimosci";
> -	clock-frequency = <80000000>;	/* 80 MHZ */
> +	clock-frequency = <20000000>;	/* 20 MHZ */
>  	#address-cells = <1>;
>  	#size-cells = <1>;
>  	interrupt-parent = <&intc>;
> @@ -44,15 +44,14 @@
>  		};
>  
>  		uart0: serial@...00000 {
> -			compatible = "snps,dw-apb-uart";
> +			compatible = "ns8250";
>  			reg = <0xc0000000 0x2000>;
>  			interrupts = <11>;
> -			#clock-frequency = <80000000>;
>  			clock-frequency = <3686400>;
>  			baud = <115200>;
>  			reg-shift = <2>;
>  			reg-io-width = <4>;
> -			status = "okay";
> +			no-loopback-test = <1>;
>  		};
>  
>  		pgu0: pgu@...00000 {

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