summaryrefslogtreecommitdiff
path: root/drivers/spi/spi-sirf.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi/spi-sirf.c')
-rw-r--r--drivers/spi/spi-sirf.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c
index 39e2c0a55a28..73a88b33f810 100644
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -23,6 +23,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-direction.h>
#include <linux/dma-mapping.h>
+#include <linux/reset.h>
#define DRIVER_NAME "sirfsoc_spi"
@@ -134,6 +135,7 @@
ALIGNED(x->len) && (x->len < 2 * PAGE_SIZE))
#define SIRFSOC_MAX_CMD_BYTES 4
+#define SIRFSOC_SPI_DEFAULT_FRQ 1000000
struct sirfsoc_spi {
struct spi_bitbang bitbang;
@@ -562,9 +564,9 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
sspi->word_width = DIV_ROUND_UP(bits_per_word, 8);
txfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) |
- sspi->word_width;
+ (sspi->word_width >> 1);
rxfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) |
- sspi->word_width;
+ (sspi->word_width >> 1);
if (!(spi->mode & SPI_CS_HIGH))
regval |= SIRFSOC_SPI_CS_IDLE_STAT;
@@ -629,9 +631,6 @@ static int spi_sirfsoc_setup(struct spi_device *spi)
{
struct sirfsoc_spi *sspi;
- if (!spi->max_speed_hz)
- return -EINVAL;
-
sspi = spi_master_get_devdata(spi->master);
if (spi->cs_gpio == -ENOENT)
@@ -649,6 +648,12 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
int irq;
int i, ret;
+ ret = device_reset(&pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "SPI reset failed!\n");
+ return ret;
+ }
+
master = spi_alloc_master(&pdev->dev, sizeof(*sspi));
if (!master) {
dev_err(&pdev->dev, "Unable to allocate SPI master\n");
@@ -683,6 +688,7 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) |
SPI_BPW_MASK(16) | SPI_BPW_MASK(32);
+ master->max_speed_hz = SIRFSOC_SPI_DEFAULT_FRQ;
sspi->bitbang.master->dev.of_node = pdev->dev.of_node;
/* request DMA channels */