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[Backport v4.0.99-ncs1-branch] [nrf fromlist] drivers: flash: nrf_qspi_nor: Prevent CPU hang when XI… #2813

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Merged
merged 1 commit into from
Apr 28, 2025
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[Backport v4.0.99-ncs1-branch] [nrf fromlist] drivers: flash: nrf_qspi_nor: Prevent CPU hang when XI… #2813

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12 changes: 12 additions & 0 deletions drivers/flash/nrf_qspi_nor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1359,6 +1359,18 @@ void z_impl_nrf_qspi_nor_xip_enable(const struct device *dev, bool enable)
#endif
if (enable) {
(void)nrfx_qspi_activate(false);
} else {
/* It turns out that when the QSPI peripheral is deactivated
* after a XIP transaction, it cannot be later successfully
* reactivated and an attempt to perform another XIP transaction
* results in the CPU being hung; even a debug session cannot be
* started then and the SoC has to be recovered.
* As a workaround, at least until the cause of such behavior
* is fully clarified, perform a simple non-XIP transaction
* (a read of the status register) before deactivating the QSPI.
* This prevents the issue from occurring.
*/
(void)qspi_rdsr(dev, 1);
}
dev_data->xip_enabled = enable;

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