soc: nordic: nrf54h: Add option to use NFCT pins as GPIOs #86280
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Protection circuit must be disabled to use NFCT antenna pins as GPIOs. It can be done by adding nfct-pins-as-gpios to nfct node in the devicetree in cpuapp. Node must be disabled as NFCT is not used. In legacy platforms same property was added to uicr node because that information was stored in UICR. In nrf54h20 it is not part of UICR so property is part of nfct node. Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
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anangl,
jaz1-nordic,
kl-cruz,
magp-nordic,
masz-nordic and
nika-nordic
nika-nordic
reviewed
Feb 25, 2025
| @@ -151,6 +152,11 @@ static int nordicsemi_nrf54h_init(void) | |||
| nrf_spu_periph_perm_dmasec_set(spu, nrf_address_slave_get(ccm030_addr), true); | |||
| #endif | |||
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|
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| if (DT_NODE_HAS_STATUS(DT_NODELABEL(nfct), disabled) && | |||
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shouldn't the NFCT node be reserved rather than disabled ?
status == reserved ensures that ownership of NFCT peripheral is assigned to given local domain.
On the other hand, status == okay should not be used because it might implicitly activate NFCT driver (not an issue now, but to be future-proof)
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NFCT is by default assigned to cpuapp so it can access NFCT registers by default no need to reserving.
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This limits use of NFCT pins to cpuapp.
When I try to use that GPIOs by cpurad I see:
- cpurad not booting because it tries to access registers of NFCT that it doesn't own
&nfct {
compatible = "nordic,nrf-nfct-v2";
status = "disabled";
nfct-pins-as-gpios;
};
- NFC not disabled because condition from line 155 is not meet
&nfct {
compatible = "nordic,nrf-nfct-v2";
status = "okay";
nfct-pins-as-gpios;
};
kl-cruz
approved these changes
Mar 11, 2025
|
@masz-nordic @anangl can you take a look? |
masz-nordic
approved these changes
Mar 12, 2025
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May 20, 2025
Align to changes made in zephyrproject-rtos/zephyr#86280 Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>
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May 21, 2025
Align to changes made in zephyrproject-rtos/zephyr#86280 Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>
|
Requires the following change in the Kconfig option that represents the DTS configuration for NFCT: -> |
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Protection circuit must be disabled to use NFCT antenna pins as GPIOs. It can be done by adding nfct-pins-as-gpios to nfct node in the devicetree in cpuapp. Node must be disabled as NFCT is not used. In legacy platforms same property was added to uicr node because that information was stored in UICR. In nrf54h20 it is not part of UICR so property is part of nfct node.