[PATCH 2/2] ARM: dts: imx6ull-tarragon: Reduce SPI clock for QCA7000

[Stefan Wahren]

Our hardware department recently informed us that, according to
the specification, the QCA7000 should be operated with a
maximum SPI clock frequency of 12 MHz. Even if it appears to work
at a higher frequency, we should not take any risks here. A short
performance test showed no measurable loss of speed.

Signed-off-by: Stefan Wahren <wahrenst at gmx.net>
---
 arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-master.dts  | 4 ++--
 arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slave.dts   | 2 +-
 arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slavext.dts | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-master.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-master.dts
index 67007ce383e3..f9bbd589b66d 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-master.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-master.dts
@@ -45,7 +45,7 @@ &pinctrl_qca700x_cp_rst
 		interrupts = <19 IRQ_TYPE_EDGE_RISING>;
 		spi-cpha;
 		spi-cpol;
-		spi-max-frequency = <16000000>;
+		spi-max-frequency = <12000000>;
 	};
 };

@@ -63,7 +63,7 @@ &pinctrl_qca700x_mains_rst
 		interrupts = <9 IRQ_TYPE_EDGE_RISING>;
 		spi-cpha;
 		spi-cpol;
-		spi-max-frequency = <16000000>;
+		spi-max-frequency = <12000000>;
 	};
 };

diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slave.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slave.dts
index cee223b5f8e1..ef06619d7c86 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slave.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slave.dts
@@ -23,7 +23,7 @@ &pinctrl_qca700x_cp_rst
 		interrupts = <19 IRQ_TYPE_EDGE_RISING>;
 		spi-cpha;
 		spi-cpol;
-		spi-max-frequency = <16000000>;
+		spi-max-frequency = <12000000>;
 	};
 };

diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slavext.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slavext.dts
index 7fd53b7a4372..83db65bf630f 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slavext.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-tarragon-slavext.dts
@@ -45,7 +45,7 @@ &pinctrl_qca700x_cp_rst
 		interrupts = <19 IRQ_TYPE_EDGE_RISING>;
 		spi-cpha;
 		spi-cpol;
-		spi-max-frequency = <16000000>;
+		spi-max-frequency = <12000000>;
 	};
 };

--
2.34.1