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ARM: dts: at91: sama7g5ek: Align the impedance of the QSPI0's HSIO and PCB lines

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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>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220406130505.422042-1-tudor.ambarus@microchip.com
This commit is contained in:
Tudor Ambarus 2022-04-06 16:05:05 +03:00 committed by Nicolas Ferre
parent 3f7ce6d709
commit 68a9345536
1 changed files with 1 additions and 1 deletions
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2
arch/arm/boot/dts/at91-sama7g5ek.dts
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@ -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 {