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path: root/drivers/i2c/busses/i2c-tegra.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-tegra.c')
-rw-r--r--drivers/i2c/busses/i2c-tegra.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 954022c04cc4..3869c258a529 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -284,6 +284,7 @@ struct tegra_i2c_dev {
struct dma_chan *tx_dma_chan;
struct dma_chan *rx_dma_chan;
unsigned int dma_buf_size;
+ struct device *dma_dev;
dma_addr_t dma_phys;
void *dma_buf;
@@ -420,7 +421,7 @@ static int tegra_i2c_dma_submit(struct tegra_i2c_dev *i2c_dev, size_t len)
static void tegra_i2c_release_dma(struct tegra_i2c_dev *i2c_dev)
{
if (i2c_dev->dma_buf) {
- dma_free_coherent(i2c_dev->dev, i2c_dev->dma_buf_size,
+ dma_free_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size,
i2c_dev->dma_buf, i2c_dev->dma_phys);
i2c_dev->dma_buf = NULL;
}
@@ -472,10 +473,13 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
i2c_dev->tx_dma_chan = chan;
+ WARN_ON(i2c_dev->tx_dma_chan->device != i2c_dev->rx_dma_chan->device);
+ i2c_dev->dma_dev = chan->device->dev;
+
i2c_dev->dma_buf_size = i2c_dev->hw->quirks->max_write_len +
I2C_PACKET_HEADER_SIZE;
- dma_buf = dma_alloc_coherent(i2c_dev->dev, i2c_dev->dma_buf_size,
+ dma_buf = dma_alloc_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size,
&dma_phys, GFP_KERNEL | __GFP_NOWARN);
if (!dma_buf) {
dev_err(i2c_dev->dev, "failed to allocate DMA buffer\n");
@@ -1272,7 +1276,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
if (i2c_dev->dma_mode) {
if (i2c_dev->msg_read) {
- dma_sync_single_for_device(i2c_dev->dev,
+ dma_sync_single_for_device(i2c_dev->dma_dev,
i2c_dev->dma_phys,
xfer_size, DMA_FROM_DEVICE);
@@ -1280,7 +1284,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
if (err)
return err;
} else {
- dma_sync_single_for_cpu(i2c_dev->dev,
+ dma_sync_single_for_cpu(i2c_dev->dma_dev,
i2c_dev->dma_phys,
xfer_size, DMA_TO_DEVICE);
}
@@ -1293,7 +1297,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
memcpy(i2c_dev->dma_buf + I2C_PACKET_HEADER_SIZE,
msg->buf, msg->len);
- dma_sync_single_for_device(i2c_dev->dev,
+ dma_sync_single_for_device(i2c_dev->dma_dev,
i2c_dev->dma_phys,
xfer_size, DMA_TO_DEVICE);
@@ -1344,7 +1348,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
}
if (i2c_dev->msg_read && i2c_dev->msg_err == I2C_ERR_NONE) {
- dma_sync_single_for_cpu(i2c_dev->dev,
+ dma_sync_single_for_cpu(i2c_dev->dma_dev,
i2c_dev->dma_phys,
xfer_size, DMA_FROM_DEVICE);