netdev - [RFC PATCH net-next 11/11] ARM: dts: ls1021a-tsn: Reduce the SJA1105 SPI frequency for debug

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Date:   Fri, 16 Aug 2019 03:44:49 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     h.feurstein@...il.com, mlichvar@...hat.com,
        richardcochran@...il.com, andrew@...n.ch, f.fainelli@...il.com,
        broonie@...nel.org
Cc:     linux-spi@...r.kernel.org, netdev@...r.kernel.org,
        Vladimir Oltean <olteanv@...il.com>
Subject: [RFC PATCH net-next 11/11] ARM: dts: ls1021a-tsn: Reduce the SJA1105 SPI frequency for debug

I have a logic analyzer that cannot sample signals at a higher frequency
than this, and it's nice to actually see the captured data and not just
an amorphous mess.

Signed-off-by: Vladimir Oltean <olteanv@...il.com>
---
 arch/arm/boot/dts/ls1021a-tsn.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/ls1021a-tsn.dts b/arch/arm/boot/dts/ls1021a-tsn.dts
index 3b35e6b5977f..8fdf4c3b24c7 100644
--- a/arch/arm/boot/dts/ls1021a-tsn.dts
+++ b/arch/arm/boot/dts/ls1021a-tsn.dts
@@ -55,7 +55,7 @@
 		#size-cells = <0>;
 		compatible = "nxp,sja1105t";
 		/* 12 MHz */
-		spi-max-frequency = <12000000>;
+		spi-max-frequency = <6000000>;
 		/* Sample data on trailing clock edge */
 		spi-cpha;
 		/* SPI controller settings for SJA1105 timing requirements */
-- 
2.17.1