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From: vigneshr@ti.com (Vignesh R)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: dra7: Support QSPI MODE-0 operation at 64MHz
Date: Thu, 25 Feb 2016 10:17:32 +0530	[thread overview]
Message-ID: <1456375652-14071-1-git-send-email-vigneshr@ti.com> (raw)

According to Data Manual(SPRS915P) of AM57x, TI QSPI controller on
DRA74(rev 1.1+) can support up to 64MHz in MODE-0, whereas MODE-3 is
limited to 48MHz. Hence, switch to MODE-0 for better throughput.

Signed-off-by: Vignesh R <vigneshr@ti.com>
---
 arch/arm/boot/dts/dra7-evm.dts | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index cfc24e52244e..15f10bdc8c31 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -653,15 +653,13 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&qspi1_pins>;
 
-	spi-max-frequency = <48000000>;
+	spi-max-frequency = <64000000>;
 	m25p80 at 0 {
 		compatible = "s25fl256s1";
-		spi-max-frequency = <48000000>;
+		spi-max-frequency = <64000000>;
 		reg = <0>;
 		spi-tx-bus-width = <1>;
 		spi-rx-bus-width = <4>;
-		spi-cpol;
-		spi-cpha;
 		#address-cells = <1>;
 		#size-cells = <1>;
 
-- 
2.7.1

             reply	other threads:[~2016-02-25  4:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-25  4:47 Vignesh R [this message]
2016-02-26 19:13 ` [PATCH] ARM: dts: dra7: Support QSPI MODE-0 operation at 64MHz Tony Lindgren
2016-02-29 11:52   ` Vignesh R

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