diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index f2d19f1c5ab1..c131441e4dd4 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -689,6 +689,7 @@ static int stm32_qspi_dma_setup(struct stm32_qspi *qspi) { struct dma_slave_config dma_cfg; struct device *dev = qspi->dev; + struct dma_slave_caps caps; int ret = 0; memset(&dma_cfg, 0, sizeof(dma_cfg)); @@ -697,8 +698,6 @@ static int stm32_qspi_dma_setup(struct stm32_qspi *qspi) dma_cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; dma_cfg.src_addr = qspi->phys_base + QSPI_DR; dma_cfg.dst_addr = qspi->phys_base + QSPI_DR; - dma_cfg.src_maxburst = 4; - dma_cfg.dst_maxburst = 4; qspi->dma_chrx = dma_request_chan(dev, "rx"); if (IS_ERR(qspi->dma_chrx)) { @@ -707,6 +706,11 @@ static int stm32_qspi_dma_setup(struct stm32_qspi *qspi) if (ret == -EPROBE_DEFER) goto out; } else { + ret = dma_get_slave_caps(qspi->dma_chrx, &caps); + if (ret) + return ret; + + dma_cfg.src_maxburst = caps.max_burst / dma_cfg.src_addr_width; if (dmaengine_slave_config(qspi->dma_chrx, &dma_cfg)) { dev_err(dev, "dma rx config failed\n"); dma_release_channel(qspi->dma_chrx); @@ -719,6 +723,11 @@ static int stm32_qspi_dma_setup(struct stm32_qspi *qspi) ret = PTR_ERR(qspi->dma_chtx); qspi->dma_chtx = NULL; } else { + ret = dma_get_slave_caps(qspi->dma_chtx, &caps); + if (ret) + return ret; + + dma_cfg.dst_maxburst = caps.max_burst / dma_cfg.dst_addr_width; if (dmaengine_slave_config(qspi->dma_chtx, &dma_cfg)) { dev_err(dev, "dma tx config failed\n"); dma_release_channel(qspi->dma_chtx);