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@xxxxxxx> --- 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
