From: Vinod Koul <vkoul@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
Mark Brown <broonie@kernel.org>, Wolfram Sang <wsa@kernel.org>
Cc: Vinod Koul <vkoul@kernel.org>, Andy Gross <agross@kernel.org>,
Sumit Semwal <sumit.semwal@linaro.org>,
Douglas Anderson <dianders@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
linux-spi@vger.kernel.org, linux-i2c@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 3/5] spi: core: add dma_map_dev for dma device
Date: Fri, 25 Jun 2021 10:52:11 +0530 [thread overview]
Message-ID: <20210625052213.32260-4-vkoul@kernel.org> (raw)
In-Reply-To: <20210625052213.32260-1-vkoul@kernel.org>
Some controllers like qcom geni need the parent device to be used for
dma mapping, so add a dma_map_dev field and let drivers fill this to be
used as mapping device
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
drivers/spi/spi.c | 4 ++++
include/linux/spi/spi.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index e353b7a9e54e..315f7e7545f7 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -961,11 +961,15 @@ static int __spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg)
if (ctlr->dma_tx)
tx_dev = ctlr->dma_tx->device->dev;
+ else if (ctlr->dma_map_dev)
+ tx_dev = ctlr->dma_map_dev;
else
tx_dev = ctlr->dev.parent;
if (ctlr->dma_rx)
rx_dev = ctlr->dma_rx->device->dev;
+ else if (ctlr->dma_map_dev)
+ rx_dev = ctlr->dma_map_dev;
else
rx_dev = ctlr->dev.parent;
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 74239d65c7fd..4d3f116f5723 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -586,6 +586,7 @@ struct spi_controller {
bool (*can_dma)(struct spi_controller *ctlr,
struct spi_device *spi,
struct spi_transfer *xfer);
+ struct device *dma_map_dev;
/*
* These hooks are for drivers that want to use the generic
--
2.31.1
next prev parent reply other threads:[~2021-06-25 5:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 5:22 [PATCH v3 0/5] Add and enable GPI DMA users Vinod Koul
2021-06-25 5:22 ` [PATCH v3 1/5] soc: qcom: geni: move GENI_IF_DISABLE_RO to common header Vinod Koul
2021-06-28 23:37 ` Doug Anderson
2021-06-25 5:22 ` [PATCH v3 2/5] soc: qcom: geni: Add support for gpi dma Vinod Koul
2021-06-28 23:38 ` Doug Anderson
2021-06-29 3:37 ` Vinod Koul
2021-06-25 5:22 ` Vinod Koul [this message]
2021-06-25 5:22 ` [PATCH v3 4/5] spi: spi-geni-qcom: Add support for GPI dma Vinod Koul
2021-06-28 23:37 ` Doug Anderson
2021-10-14 16:04 ` Vinod Koul
2021-10-14 16:55 ` Doug Anderson
2021-10-18 16:53 ` Vinod Koul
2021-06-25 5:22 ` [PATCH v3 5/5] i2c: qcom-geni: Add support for GPI DMA Vinod Koul
2021-06-25 13:24 ` (subset) [PATCH v3 0/5] Add and enable GPI DMA users Mark Brown
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