linux-kernel - [PATCH 3.11 131/182] ARC: [nsimosci] Change .dts to use generic 8250 UART

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Message-Id: <1398329507-5911-132-git-send-email-luis.henriques@canonical.com>
Date:	Thu, 24 Apr 2014 09:50:56 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Mischa Jonker <mjonker@...opsys.com>,
	Vineet Gupta <vgupta@...opsys.com>,
	Francois Bedard <Francois.Bedard@...opsys.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 131/182] ARC: [nsimosci] Change .dts to use generic 8250 UART

3.11.10.9 -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: Luis Henriques <luis.henriques@...onical.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 ea16d78..8bd238c 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 {
-- 
1.9.1

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