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nrf7002ek: dts: Add pull down to SPI MISO GPIO pin

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Add a pull down to SPI MISO GPIO pin on nRF5340DK to ensure the i/o pin
on the nrf7002 device is not floating when SPI is inactive.

Signed-off-by: Bansidhar Mangalwedhekar <bansidhar.mangalwedhekar@nordicsemi.no>
This commit is contained in:
Bansidhar Mangalwedhekar 2025-05-05 09:54:35 +05:30 • committed by Anas Nashif
commit bf2efc762f
1 changed files with 31 additions and 0 deletions
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31
boards/shields/nrf7002ek/boards/nrf5340dk_nrf5340_cpuapp.overlay
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@ -13,3 +13,34 @@
&gpio_fwd {
status = "disabled";
};
/*
* Override the default pinctrl settings for SPI4 when used with the nRF7002 EK
* to pull down the MISO line. This is needed to avoid floating inputs when
* the SPI4 is not used. The default pinctrl settings are defined in the
* nrf5340_cpuapp_common_pinctrl.dtsi file.
*/
&pinctrl {
spi4_default: spi4_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
<NRF_PSEL(SPIM_MOSI, 1, 13)>;
};
group2 {
psels = <NRF_PSEL(SPIM_MISO, 1, 14)>;
bias-pull-down;
};
};
spi4_sleep: spi4_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
<NRF_PSEL(SPIM_MOSI, 1, 13)>;
};
group2 {
psels = <NRF_PSEL(SPIM_MISO, 1, 14)>;
bias-pull-down;
};
low-power-enable;
};
};