linux-kernel - [PATCH 3.10 35/41] ARC: [nsimosci] Change .dts to use generic 8250 UART

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Message-Id: <20140411160935.368874322@linuxfoundation.org>
Date:	Fri, 11 Apr 2014 09:10:06 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Mischa Jonker <mjonker@...opsys.com>,
	Vineet Gupta <vgupta@...opsys.com>,
	Francois Bedard <Francois.Bedard@...opsys.com>
Subject: [PATCH 3.10 35/41] ARC: [nsimosci] Change .dts to use generic 8250 UART

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mischa Jonker <mjonker@...opsys.com>

commit 6eda477b3c54b8236868c8784e5e042ff14244f0 upstream.

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: Francois Bedard <Francois.Bedard@...opsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arc/boot/dts/nsimosci.dts |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- 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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