[PATCH v9 05/16] dmaengine: dw-axi-dmac: Add device_config operation
From: Sia Jee Heng <hidden>
Date: 2021-01-05 01:01:37
Also in:
dmaengine, lkml
Subsystem:
dma generic offload engine subsystem, synopsys designware axi dmac driver, the rest · Maintainers:
Vinod Koul, Eugeniy Paltsev, Linus Torvalds
Add device_config() callback function so that the device address can be passed to the dma driver. DMA clients use this interface to pass in the device address to the AxiDMA. Without this interface, data transfer between device to memory and memory to device would failed. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Sia Jee Heng <redacted> --- drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 11 +++++++++++ drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 + 2 files changed, 12 insertions(+)
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index 241ab7a24e2a..eaa7c4c404ca 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c@@ -559,6 +559,16 @@ dma_chan_prep_dma_memcpy(struct dma_chan *dchan, dma_addr_t dst_adr, return NULL; } +static int dw_axi_dma_chan_slave_config(struct dma_chan *dchan, + struct dma_slave_config *config) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + + memcpy(&chan->config, config, sizeof(*config)); + + return 0; +} + static void axi_chan_dump_lli(struct axi_dma_chan *chan, struct axi_dma_hw_desc *desc) {
@@ -948,6 +958,7 @@ static int dw_probe(struct platform_device *pdev) dw->dma.device_prep_dma_memcpy = dma_chan_prep_dma_memcpy; dw->dma.device_synchronize = dw_axi_dma_synchronize; + dw->dma.device_config = dw_axi_dma_chan_slave_config; platform_set_drvdata(pdev, chip);
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
index f886b2bb75de..a75b921d6b1a 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h@@ -43,6 +43,7 @@ struct axi_dma_chan { struct virt_dma_chan vc; struct axi_dma_desc *desc; + struct dma_slave_config config; /* these other elements are all protected by vc.lock */ bool is_paused; };
--
2.18.0