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| author | Tudor Ambarus <tudor.ambarus@microchip.com> | 2022-04-06 16:05:05 +0300 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@microchip.com> | 2022-04-13 18:42:50 +0200 |
| commit | 68a9345536daf199147d2ef07ec2ef0df43672ac (patch) | |
| tree | 5545e367cab076eff1ff07d2a77341d2d9f86448 /arch/arm | |
| parent | 3f7ce6d7091765ed6c67c5d78aa364b9d17e3aab (diff) | |
| download | linux-68a9345536daf199147d2ef07ec2ef0df43672ac.tar.gz linux-68a9345536daf199147d2ef07ec2ef0df43672ac.tar.bz2 linux-68a9345536daf199147d2ef07ec2ef0df43672ac.zip | |
ARM: dts: at91: sama7g5ek: Align the impedance of the QSPI0's HSIO and PCB lines
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
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boot/dts/at91-sama7g5ek.dts | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts index dd047a852390..d83f76a6cd6a 100644 --- a/arch/arm/boot/dts/at91-sama7g5ek.dts +++ b/arch/arm/boot/dts/at91-sama7g5ek.dts @@ -655,7 +655,7 @@ <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 { |