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authorLinus Torvalds <torvalds@linux-foundation.org>2015-12-02 16:45:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-12-02 16:45:56 -0800
commite69be8c2dee6fa6965fa01b08dc060948c491c79 (patch)
treea0b398e2f01b2b8a85d93ca108871e6503bb8e1d /drivers
parent25364a9e54fb8296837061bf684b76d20eec01fb (diff)
parenta057d737d6ad64c47eb60d7c058cdab6585e96a6 (diff)
Merge tag 'spi-fix-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown: "There's one fix for the core here, we weren't reinitialising the actual transferred length in messages when they get reused which meant that we'd just keep adding to the length if a message is reused. This has limited impact since it's only used in error handling cases but will really mess anything that tries to use it up when it triggers. As ever there's a small collection of driver specific fixes too" * tag 'spi-fix-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: bugfix: spi_message.transfer_length does not get reset spi: pl022: handle EPROBE_DEFER for dma spi: bcm63xx: use correct format string for printing a resource spi: mediatek: single device does not require cs_gpios spi: Add missing kerneldoc description for parameter
Diffstat (limited to 'drivers')
-rw-r--r--drivers/spi/spi-bcm63xx.c4
-rw-r--r--drivers/spi/spi-mt65xx.c26
-rw-r--r--drivers/spi/spi-pl022.c28
-rw-r--r--drivers/spi/spi.c2
4 files changed, 44 insertions, 16 deletions
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index 06858e04ec59..bf9a610e5b89 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -562,8 +562,8 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
goto out_clk_disable;
}
- dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d)\n",
- r->start, irq, bs->fifo_size);
+ dev_info(dev, "at %pr (irq %d, FIFOs size %d)\n",
+ r, irq, bs->fifo_size);
return 0;
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 563954a61424..7840067062a8 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -410,7 +410,7 @@ static int mtk_spi_setup(struct spi_device *spi)
if (!spi->controller_data)
spi->controller_data = (void *)&mtk_default_chip_info;
- if (mdata->dev_comp->need_pad_sel)
+ if (mdata->dev_comp->need_pad_sel && gpio_is_valid(spi->cs_gpio))
gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
return 0;
@@ -632,13 +632,23 @@ static int mtk_spi_probe(struct platform_device *pdev)
goto err_put_master;
}
- for (i = 0; i < master->num_chipselect; i++) {
- ret = devm_gpio_request(&pdev->dev, master->cs_gpios[i],
- dev_name(&pdev->dev));
- if (ret) {
- dev_err(&pdev->dev,
- "can't get CS GPIO %i\n", i);
- goto err_put_master;
+ if (!master->cs_gpios && master->num_chipselect > 1) {
+ dev_err(&pdev->dev,
+ "cs_gpios not specified and num_chipselect > 1\n");
+ ret = -EINVAL;
+ goto err_put_master;
+ }
+
+ if (master->cs_gpios) {
+ for (i = 0; i < master->num_chipselect; i++) {
+ ret = devm_gpio_request(&pdev->dev,
+ master->cs_gpios[i],
+ dev_name(&pdev->dev));
+ if (ret) {
+ dev_err(&pdev->dev,
+ "can't get CS GPIO %i\n", i);
+ goto err_put_master;
+ }
}
}
}
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 94af80676684..5e5fd77e2711 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -1171,19 +1171,31 @@ err_no_rxchan:
static int pl022_dma_autoprobe(struct pl022 *pl022)
{
struct device *dev = &pl022->adev->dev;
+ struct dma_chan *chan;
+ int err;
/* automatically configure DMA channels from platform, normally using DT */
- pl022->dma_rx_channel = dma_request_slave_channel(dev, "rx");
- if (!pl022->dma_rx_channel)
+ chan = dma_request_slave_channel_reason(dev, "rx");
+ if (IS_ERR(chan)) {
+ err = PTR_ERR(chan);
goto err_no_rxchan;
+ }
+
+ pl022->dma_rx_channel = chan;
- pl022->dma_tx_channel = dma_request_slave_channel(dev, "tx");
- if (!pl022->dma_tx_channel)
+ chan = dma_request_slave_channel_reason(dev, "tx");
+ if (IS_ERR(chan)) {
+ err = PTR_ERR(chan);
goto err_no_txchan;
+ }
+
+ pl022->dma_tx_channel = chan;
pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!pl022->dummypage)
+ if (!pl022->dummypage) {
+ err = -ENOMEM;
goto err_no_dummypage;
+ }
return 0;
@@ -1194,7 +1206,7 @@ err_no_txchan:
dma_release_channel(pl022->dma_rx_channel);
pl022->dma_rx_channel = NULL;
err_no_rxchan:
- return -ENODEV;
+ return err;
}
static void terminate_dma(struct pl022 *pl022)
@@ -2236,6 +2248,10 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id)
/* Get DMA channels, try autoconfiguration first */
status = pl022_dma_autoprobe(pl022);
+ if (status == -EPROBE_DEFER) {
+ dev_dbg(dev, "deferring probe to get DMA channel\n");
+ goto err_no_irq;
+ }
/* If that failed, use channels from platform_info */
if (status == 0)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index e2415be209d5..2b0a8ec3affb 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -376,6 +376,7 @@ static void spi_drv_shutdown(struct device *dev)
/**
* __spi_register_driver - register a SPI driver
+ * @owner: owner module of the driver to register
* @sdrv: the driver to register
* Context: can sleep
*
@@ -2130,6 +2131,7 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
* Set transfer tx_nbits and rx_nbits as single transfer default
* (SPI_NBITS_SINGLE) if it is not set for this transfer.
*/
+ message->frame_length = 0;
list_for_each_entry(xfer, &message->transfers, transfer_list) {
message->frame_length += xfer->len;
if (!xfer->bits_per_word)