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spi: zynqmp_qspi: Workaround for small data cache issue

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Cache related issues are seen with small sized data reads.
Due to this, proper data is not read. Also some times sf probe
fails randomly. To workaround this issue, invalidate dcache after read DMA
is triggered.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230915031759.28889-3-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Venkatesh Yadav Abbarapu 2023-09-15 08:47:59 +05:30 committed by Michal Simek
parent 638189ddea
commit a3ade3dae4
1 changed files with 2 additions and 0 deletions
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2
drivers/spi/zynqmp_gqspi.c
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@ -707,6 +707,8 @@ static int zynqmp_qspi_start_dma(struct zynqmp_qspi_priv *priv,
return -ETIMEDOUT;
}
invalidate_dcache_range(addr, addr + size);
writel(GQSPI_DMA_DST_I_STS_DONE, &dma_regs->dmaisr);
debug("buf:0x%lx, rxbuf:0x%lx, *buf:0x%x len: 0x%x\n",