Messages in this thread | | | Date | Wed, 13 Apr 2022 14:43:42 +0200 | Subject | Re: [PATCH] ARM: dts: at91: sama7g5ek: Align the impedance of the QSPI0's HSIO and PCB lines | From | Nicolas Ferre <> |
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On 06/04/2022 at 15:05, Tudor Ambarus wrote: > The impedance of the QSPI PCB lines on the sama7g5ek is 50 Ohms. > Align the output impedance of the QSPI0 HSIOs by setting a medium drive > strength which corresponds to an impedance of 56 Ohms when VDD is in the > 3.0V - 3.6V range. The high drive strength setting corresponds to an > output impedance of 42 Ohms on the QSPI0 HSIOs. > > Suggested-by: Mihai Sain <mihai.sain@microchip.com> > Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Queued in fixes branch for 5.18. Thanks! Best regards, Nicolas
> --- > arch/arm/boot/dts/at91-sama7g5ek.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts > index 08685a10eda1..8f9643170ba3 100644 > --- a/arch/arm/boot/dts/at91-sama7g5ek.dts > +++ b/arch/arm/boot/dts/at91-sama7g5ek.dts > @@ -655,7 +655,7 @@ pinctrl_qspi: qspi { > <PIN_PB21__QSPI0_INT>; > bias-disable; > slew-rate = <0>; > - atmel,drive-strength = <ATMEL_PIO_DRVSTR_HI>; > + atmel,drive-strength = <ATMEL_PIO_DRVSTR_ME>; > }; > > pinctrl_sdmmc0_default: sdmmc0_default {
-- Nicolas Ferre
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