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path: root/drivers/spi
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Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-img-spfi.c38
1 files changed, 23 insertions, 15 deletions
diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c
index e649bc7d4c08..c9f3bca988d7 100644
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -134,7 +134,6 @@ static inline void spfi_stop(struct img_spfi *spfi)
static inline void spfi_reset(struct img_spfi *spfi)
{
spfi_writel(spfi, SPFI_CONTROL_SOFT_RESET, SPFI_CONTROL);
- udelay(1);
spfi_writel(spfi, 0, SPFI_CONTROL);
}
@@ -397,6 +396,25 @@ stop_dma:
return -EIO;
}
+static int img_spfi_prepare(struct spi_master *master, struct spi_message *msg)
+{
+ struct img_spfi *spfi = spi_master_get_devdata(master);
+ u32 val;
+
+ val = spfi_readl(spfi, SPFI_PORT_STATE);
+ if (msg->spi->mode & SPI_CPHA)
+ val |= SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
+ else
+ val &= ~SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
+ if (msg->spi->mode & SPI_CPOL)
+ val |= SPFI_PORT_STATE_CK_POL(msg->spi->chip_select);
+ else
+ val &= ~SPFI_PORT_STATE_CK_POL(msg->spi->chip_select);
+ spfi_writel(spfi, val, SPFI_PORT_STATE);
+
+ return 0;
+}
+
static void img_spfi_config(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *xfer)
{
@@ -416,6 +434,9 @@ static void img_spfi_config(struct spi_master *master, struct spi_device *spi,
val |= div << SPFI_DEVICE_PARAMETER_BITCLK_SHIFT;
spfi_writel(spfi, val, SPFI_DEVICE_PARAMETER(spi->chip_select));
+ spfi_writel(spfi, xfer->len << SPFI_TRANSACTION_TSIZE_SHIFT,
+ SPFI_TRANSACTION);
+
val = spfi_readl(spfi, SPFI_CONTROL);
val &= ~(SPFI_CONTROL_SEND_DMA | SPFI_CONTROL_GET_DMA);
if (xfer->tx_buf)
@@ -434,20 +455,6 @@ static void img_spfi_config(struct spi_master *master, struct spi_device *spi,
&master->cur_msg->transfers))
val |= SPFI_CONTROL_CONTINUE;
spfi_writel(spfi, val, SPFI_CONTROL);
-
- val = spfi_readl(spfi, SPFI_PORT_STATE);
- if (spi->mode & SPI_CPHA)
- val |= SPFI_PORT_STATE_CK_PHASE(spi->chip_select);
- else
- val &= ~SPFI_PORT_STATE_CK_PHASE(spi->chip_select);
- if (spi->mode & SPI_CPOL)
- val |= SPFI_PORT_STATE_CK_POL(spi->chip_select);
- else
- val &= ~SPFI_PORT_STATE_CK_POL(spi->chip_select);
- spfi_writel(spfi, val, SPFI_PORT_STATE);
-
- spfi_writel(spfi, xfer->len << SPFI_TRANSACTION_TSIZE_SHIFT,
- SPFI_TRANSACTION);
}
static int img_spfi_transfer_one(struct spi_master *master,
@@ -599,6 +606,7 @@ static int img_spfi_probe(struct platform_device *pdev)
master->set_cs = img_spfi_set_cs;
master->transfer_one = img_spfi_transfer_one;
+ master->prepare_message = img_spfi_prepare;
spfi->tx_ch = dma_request_slave_channel(spfi->dev, "tx");
spfi->rx_ch = dma_request_slave_channel(spfi->dev, "rx");