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authorMark Brown <broonie@linaro.org>2014-03-30 00:50:55 +0000
committerMark Brown <broonie@linaro.org>2014-03-30 00:50:55 +0000
commit5d0eb26ce83647f0f6ed2e681a77821c92acd014 (patch)
treef05babdd7ae7de3ef29d5442a7c1f6b9254e779b /drivers/spi/spi.c
parentff13a9a6a74a73f800a3478518636945713da9f6 (diff)
parent1e25cd4729bd76662d02b142a6a7f8504bb6aea7 (diff)
downloadlinux-5d0eb26ce83647f0f6ed2e681a77821c92acd014.tar.bz2
Merge remote-tracking branch 'spi/topic/core' into spi-next
Diffstat (limited to 'drivers/spi/spi.c')
-rw-r--r--drivers/spi/spi.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 970866d23a9b..0a8f399c907f 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -255,13 +255,12 @@ EXPORT_SYMBOL_GPL(spi_bus_type);
static int spi_drv_probe(struct device *dev)
{
const struct spi_driver *sdrv = to_spi_driver(dev->driver);
- struct spi_device *spi = to_spi_device(dev);
int ret;
- acpi_dev_pm_attach(&spi->dev, true);
- ret = sdrv->probe(spi);
+ acpi_dev_pm_attach(dev, true);
+ ret = sdrv->probe(to_spi_device(dev));
if (ret)
- acpi_dev_pm_detach(&spi->dev, true);
+ acpi_dev_pm_detach(dev, true);
return ret;
}
@@ -269,11 +268,10 @@ static int spi_drv_probe(struct device *dev)
static int spi_drv_remove(struct device *dev)
{
const struct spi_driver *sdrv = to_spi_driver(dev->driver);
- struct spi_device *spi = to_spi_device(dev);
int ret;
- ret = sdrv->remove(spi);
- acpi_dev_pm_detach(&spi->dev, true);
+ ret = sdrv->remove(to_spi_device(dev));
+ acpi_dev_pm_detach(dev, true);
return ret;
}
@@ -892,7 +890,7 @@ static int spi_stop_queue(struct spi_master *master)
*/
while ((!list_empty(&master->queue) || master->busy) && limit--) {
spin_unlock_irqrestore(&master->queue_lock, flags);
- msleep(10);
+ usleep_range(10000, 11000);
spin_lock_irqsave(&master->queue_lock, flags);
}
@@ -1617,11 +1615,10 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
{
struct spi_master *master = spi->master;
struct spi_transfer *xfer;
+ int w_size;
if (list_empty(&message->transfers))
return -EINVAL;
- if (!message->complete)
- return -EINVAL;
/* Half-duplex links include original MicroWire, and ones with
* only one data pin like SPI_3WIRE (switches direction) or where
@@ -1652,12 +1649,13 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
message->frame_length += xfer->len;
if (!xfer->bits_per_word)
xfer->bits_per_word = spi->bits_per_word;
- if (!xfer->speed_hz) {
+
+ if (!xfer->speed_hz)
xfer->speed_hz = spi->max_speed_hz;
- if (master->max_speed_hz &&
- xfer->speed_hz > master->max_speed_hz)
- xfer->speed_hz = master->max_speed_hz;
- }
+
+ if (master->max_speed_hz &&
+ xfer->speed_hz > master->max_speed_hz)
+ xfer->speed_hz = master->max_speed_hz;
if (master->bits_per_word_mask) {
/* Only 32 bits fit in the mask */
@@ -1668,12 +1666,24 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
return -EINVAL;
}
+ /*
+ * SPI transfer length should be multiple of SPI word size
+ * where SPI word size should be power-of-two multiple
+ */
+ if (xfer->bits_per_word <= 8)
+ w_size = 1;
+ else if (xfer->bits_per_word <= 16)
+ w_size = 2;
+ else
+ w_size = 4;
+
+ /* No partial transfers accepted */
+ if (xfer->len % w_size)
+ return -EINVAL;
+
if (xfer->speed_hz && master->min_speed_hz &&
xfer->speed_hz < master->min_speed_hz)
return -EINVAL;
- if (xfer->speed_hz && master->max_speed_hz &&
- xfer->speed_hz > master->max_speed_hz)
- return -EINVAL;
if (xfer->tx_buf && !xfer->tx_nbits)
xfer->tx_nbits = SPI_NBITS_SINGLE;