From c834a7847602424157bbaf9898a5c677c3bb1f83 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Tue, 16 Apr 2024 21:06:59 +0200 Subject: [PATCH] ARM: dts: imx6ull-tarragon: Reduce SPI clock for QCA7000 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 Signed-off-by: Shawn Guo --- 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 67007ce383e3c..f9bbd589b66da 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 @@ interrupts = <19 IRQ_TYPE_EDGE_RISING>; spi-cpha; spi-cpol; - spi-max-frequency = <16000000>; + spi-max-frequency = <12000000>; }; }; @@ -63,7 +63,7 @@ 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 cee223b5f8e1c..ef06619d7c867 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 @@ 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 7fd53b7a43723..83db65bf630fc 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 @@ interrupts = <19 IRQ_TYPE_EDGE_RISING>; spi-cpha; spi-cpol; - spi-max-frequency = <16000000>; + spi-max-frequency = <12000000>; }; }; -- 2.30.2