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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.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 916580740e77..39dc02e366f4 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -66,8 +66,7 @@ struct spi_imx_data;
struct spi_imx_devtype_data {
void (*intctrl)(struct spi_imx_data *, int);
int (*prepare_message)(struct spi_imx_data *, struct spi_message *);
- int (*prepare_transfer)(struct spi_imx_data *, struct spi_device *,
- struct spi_transfer *);
+ int (*prepare_transfer)(struct spi_imx_data *, struct spi_device *);
void (*trigger)(struct spi_imx_data *);
int (*rx_available)(struct spi_imx_data *);
void (*reset)(struct spi_imx_data *);
@@ -572,11 +571,10 @@ static int mx51_ecspi_prepare_message(struct spi_imx_data *spi_imx,
}
static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
- struct spi_device *spi,
- struct spi_transfer *t)
+ struct spi_device *spi)
{
u32 ctrl = readl(spi_imx->base + MX51_ECSPI_CTRL);
- u32 clk = t->speed_hz, delay;
+ u32 clk, delay;
/* Clear BL field and set the right value */
ctrl &= ~MX51_ECSPI_CTRL_BL_MASK;
@@ -590,7 +588,7 @@ 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, t->speed_hz, &clk);
+ ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->spi_bus_clk, &clk);
spi_imx->spi_bus_clk = clk;
if (spi_imx->usedma)
@@ -702,13 +700,12 @@ static int mx31_prepare_message(struct spi_imx_data *spi_imx,
}
static int mx31_prepare_transfer(struct spi_imx_data *spi_imx,
- struct spi_device *spi,
- struct spi_transfer *t)
+ struct spi_device *spi)
{
unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
unsigned int clk;
- reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, t->speed_hz, &clk) <<
+ reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->spi_bus_clk, &clk) <<
MX31_CSPICTRL_DR_SHIFT;
spi_imx->spi_bus_clk = clk;
@@ -807,14 +804,13 @@ static int mx21_prepare_message(struct spi_imx_data *spi_imx,
}
static int mx21_prepare_transfer(struct spi_imx_data *spi_imx,
- struct spi_device *spi,
- struct spi_transfer *t)
+ struct spi_device *spi)
{
unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER;
unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18;
unsigned int clk;
- reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, t->speed_hz, max, &clk)
+ reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, spi_imx->spi_bus_clk, max, &clk)
<< MX21_CSPICTRL_DR_SHIFT;
spi_imx->spi_bus_clk = clk;
@@ -883,13 +879,12 @@ static int mx1_prepare_message(struct spi_imx_data *spi_imx,
}
static int mx1_prepare_transfer(struct spi_imx_data *spi_imx,
- struct spi_device *spi,
- struct spi_transfer *t)
+ struct spi_device *spi)
{
unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
unsigned int clk;
- reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, t->speed_hz, &clk) <<
+ reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->spi_bus_clk, &clk) <<
MX1_CSPICTRL_DR_SHIFT;
spi_imx->spi_bus_clk = clk;
@@ -1168,6 +1163,16 @@ 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;
+ }
+ 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;
/*
@@ -1209,7 +1214,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
spi_imx->slave_burst = t->len;
}
- spi_imx->devtype_data->prepare_transfer(spi_imx, spi, t);
+ spi_imx->devtype_data->prepare_transfer(spi_imx, spi);
return 0;
}
@@ -1800,7 +1805,7 @@ static struct platform_driver spi_imx_driver = {
};
module_platform_driver(spi_imx_driver);
-MODULE_DESCRIPTION("SPI Controller driver");
+MODULE_DESCRIPTION("i.MX SPI Controller driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);