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drivers: spi: Fix data loss issue in QSPI

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QSPI driver performs chip select operation before every read/write
access. During this operation, driver needs to enable and disable
the QSPI controller. This may cause data loss if there is inadvertent
halting of any ongoing read/write operation. To avoid this scenario,
waiting for the QSPI status to be idle before next read/write
operation is implemented.

Signed-off-by: Naresh Kumar Ravulapalli <nareshkumar.ravulapalli@altera.com>
Reviewed-by: Tien Fong Chee <tien.fong.chee@intel.com>
This commit is contained in:
Naresh Kumar Ravulapalli
2025-03-07 01:38:26 -08:00
committed by Tom Rini
parent 93f4888d71
commit c0ed43c2a9
1 changed files with 9 additions and 0 deletions
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9
drivers/spi/cadence_qspi_apb.c
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@@ -747,6 +747,10 @@ cadence_qspi_apb_indirect_read_execute(struct cadence_spi_priv *priv,
goto failrd;
}
/* Wait til QSPI is idle */
if (!cadence_qspi_wait_idle(priv->regbase))
return -EIO;
return 0;
failrd:
@@ -914,6 +918,11 @@ cadence_qspi_apb_indirect_write_execute(struct cadence_spi_priv *priv,
if (bounce_buf)
free(bounce_buf);
/* Wait til QSPI is idle */
if (!cadence_qspi_wait_idle(priv->regbase))
return -EIO;
return 0;
failwr: