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path: root/drivers/spi/spi-bcm2835.c
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Diffstat (limited to 'drivers/spi/spi-bcm2835.c')
-rw-r--r--drivers/spi/spi-bcm2835.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index e709887eb2..e1b9b12357 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -1117,19 +1117,6 @@ static int bcm2835_spi_prepare_message(struct spi_controller *ctlr,
struct spi_device *spi = msg->spi;
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
struct bcm2835_spidev *target = spi_get_ctldata(spi);
- int ret;
-
- if (ctlr->can_dma) {
- /*
- * DMA transfers are limited to 16 bit (0 to 65535 bytes) by
- * the SPI HW due to DLEN. Split up transfers (32-bit FIFO
- * aligned) if the limit is exceeded.
- */
- ret = spi_split_transfers_maxsize(ctlr, msg, 65532,
- GFP_KERNEL | GFP_DMA);
- if (ret)
- return ret;
- }
/*
* Set up clock polarity before spi_transfer_one_message() asserts
@@ -1219,6 +1206,19 @@ static int bcm2835_spi_setup_dma(struct spi_controller *ctlr,
return 0;
}
+static size_t bcm2835_spi_max_transfer_size(struct spi_device *spi)
+{
+ /*
+ * DMA transfers are limited to 16 bit (0 to 65535 bytes) by
+ * the SPI HW due to DLEN. Split up transfers (32-bit FIFO
+ * aligned) if the limit is exceeded.
+ */
+ if (spi->controller->can_dma)
+ return 65532;
+
+ return SIZE_MAX;
+}
+
static int bcm2835_spi_setup(struct spi_device *spi)
{
struct spi_controller *ctlr = spi->controller;
@@ -1348,6 +1348,7 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
ctlr->mode_bits = BCM2835_SPI_MODE_BITS;
ctlr->bits_per_word_mask = SPI_BPW_MASK(8);
ctlr->num_chipselect = 3;
+ ctlr->max_transfer_size = bcm2835_spi_max_transfer_size;
ctlr->setup = bcm2835_spi_setup;
ctlr->cleanup = bcm2835_spi_cleanup;
ctlr->transfer_one = bcm2835_spi_transfer_one;