From a3ade3dae4d93f9b5282ddb4885d69161729ec6d Mon Sep 17 00:00:00 2001 From: Venkatesh Yadav Abbarapu Date: Fri, 15 Sep 2023 08:47:59 +0530 Subject: [PATCH] spi: zynqmp_qspi: Workaround for small data cache issue 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 Signed-off-by: Venkatesh Yadav Abbarapu Link: https://lore.kernel.org/r/20230915031759.28889-3-venkatesh.abbarapu@amd.com Signed-off-by: Michal Simek --- drivers/spi/zynqmp_gqspi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c index a506d15227..ec59ef5804 100644 --- a/drivers/spi/zynqmp_gqspi.c +++ b/drivers/spi/zynqmp_gqspi.c @@ -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", -- 2.39.5