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mpfs_corespi: Fix firing of stale interrupt after warm reset

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After warm reset the interrupt source in the HW block is not explicitly
cleared, thus once the interrupt source is enabled the old / stale interrupt
fires immediately.

This causes a DEBUGASSERT() failure on line 808 mpfs_spi_unload_rx_fifo:
  DEBUGASSERT(nwords > 0);
This commit is contained in:
Ville Juven 2024-01-18 14:54:23 +02:00 committed by Alan Carvalho de Assis
parent c4f76ff867
commit a188cf3480
1 changed files with 16 additions and 0 deletions
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16
arch/risc-v/src/mpfs/mpfs_corespi.c
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@ -1435,6 +1435,22 @@ static void mpfs_spi_init(struct spi_dev_s *dev)
mpfs_spi_set_master_mode(priv, 1);
mpfs_spi_enable(priv, 1);
/* Disable all interrupt sources */
modifyreg32(MPFS_SPI_CONTROL, MPFS_SPI_INTTXTURUN |
MPFS_SPI_INTRXOVRFLOW |
MPFS_SPI_INTTXDONE,
0);
/* Clear all interrupt sources */
putreg32(MPFS_SPI_TXCHUNDRUN |
MPFS_SPI_RXCHOVRFLW |
MPFS_SPI_DATA_RX |
MPFS_SPI_TXDONE, MPFS_SPI_INT_CLEAR);
/* Then enable the interrupt */
up_enable_irq(priv->plic_irq);
}