[nrf fromlist] drivers: serial: nrfx_uarte: Reorder suspend #2952
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To get a glitchfree UARTE suspend sequence we need to * load the GPIO configuration for the suspend state * disable the UARTE so the GPIO configuration is applied * (optional) enable the GPIO retention as state should stick around The previous sequence (optionally) locked the analog state of the GPIO so the configuration wouldn't actually get applied. Next it disabled the UART, falling back to the existing GPIO state. Next it loaded the new GPIO state, which could be different from the old GPIO state, leading to a potential transition from TX high to low to high. Upstream PR #: 91550 Signed-off-by: Karsten Koenig <[email protected]>
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kl-cruz
approved these changes
Jun 18, 2025
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Handled by gpd rework |
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To get a glitchfree UARTE suspend sequence we need to
The previous sequence (optionally) locked the analog state of the GPIO so the configuration wouldn't actually get applied. Next it disabled the UART, falling back to the existing GPIO state. Next it loaded the new GPIO state, which could be different from the old GPIO state, leading to a potential transition from TX high to low to high.
Upstream PR #: 91550