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path: root/drivers/spi/spi-imx.c
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Diffstat (limited to 'drivers/spi/spi-imx.c')
-rw-r--r--drivers/spi/spi-imx.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 155ddeb8fcd4..510074ef4ed4 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -42,6 +42,7 @@ MODULE_PARM_DESC(polling_limit_us,
"time in us to run a transfer in polling mode\n");
#define MXC_RPM_TIMEOUT 2000 /* 2000ms */
+#define MXC_SPI_DEFAULT_SPEED 500000 /* 500KHz */
#define MXC_CSPIRXDATA 0x00
#define MXC_CSPITXDATA 0x04
@@ -684,8 +685,11 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
/* set clock speed */
ctrl &= ~(0xf << MX51_ECSPI_CTRL_POSTDIV_OFFSET |
0xf << MX51_ECSPI_CTRL_PREDIV_OFFSET);
- ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->spi_bus_clk, &clk);
- spi_imx->spi_bus_clk = clk;
+
+ if (!spi_imx->target_mode) {
+ ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->spi_bus_clk, &clk);
+ spi_imx->spi_bus_clk = clk;
+ }
mx51_configure_cpha(spi_imx, spi);
@@ -1308,15 +1312,18 @@ static int spi_imx_setupxfer(struct spi_device *spi,
if (!t)
return 0;
- if (!t->speed_hz) {
- if (!spi->max_speed_hz) {
- dev_err(&spi->dev, "no speed_hz provided!\n");
- return -EINVAL;
+ if (!spi_imx->target_mode) {
+ if (!t->speed_hz) {
+ if (!spi->max_speed_hz) {
+ dev_err(&spi->dev, "no speed_hz provided!\n");
+ return -EINVAL;
+ }
+ dev_dbg(&spi->dev, "using spi->max_speed_hz!\n");
+ spi_imx->spi_bus_clk = spi->max_speed_hz;
+ } else {
+ spi_imx->spi_bus_clk = t->speed_hz;
}
- dev_dbg(&spi->dev, "using spi->max_speed_hz!\n");
- spi_imx->spi_bus_clk = spi->max_speed_hz;
- } else
- spi_imx->spi_bus_clk = t->speed_hz;
+ }
spi_imx->bits_per_word = t->bits_per_word;
spi_imx->count = t->len;
@@ -1831,6 +1838,7 @@ static int spi_imx_probe(struct platform_device *pdev)
controller->prepare_message = spi_imx_prepare_message;
controller->unprepare_message = spi_imx_unprepare_message;
controller->target_abort = spi_imx_target_abort;
+ spi_imx->spi_bus_clk = MXC_SPI_DEFAULT_SPEED;
controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_NO_CS |
SPI_MOSI_IDLE_LOW;