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Merge remote-tracking branch 'spi/topic/core' into spi-next

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This commit is contained in:
Mark Brown 2014-03-30 00:50:55 +00:00
commit 5d0eb26ce8
1 changed files with 28 additions and 18 deletions
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46
drivers/spi/spi.c
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@ -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;