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dmaengine: hsu: remove platform data 

There are no platforms where it's not possible to calculate
the number of channels based on IO space length, and since
that is the only purpose for struct hsu_dma_platform_data,
removing it.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2015-10-13 13:29:05 +03:00 committed by Greg Kroah-Hartman
parent 47f82f1adf
commit 4c97ad993d
5 changed files with 9 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/dma/hsu/hsu.c
View File

@ -146,7 +146,7 @@ irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr)
u32 sr;
/* Sanity check */
if (nr >= chip->pdata->nr_channels)
if (nr >= chip->hsu->nr_channels)
return IRQ_NONE;
hsuc = &chip->hsu->chan[nr];
@ -375,7 +375,6 @@ static void hsu_dma_free_chan_resources(struct dma_chan *chan)
int hsu_dma_probe(struct hsu_dma_chip *chip)
{
struct hsu_dma *hsu;
struct hsu_dma_platform_data *pdata = chip->pdata;
void __iomem *addr = chip->regs + chip->offset;
unsigned short i;
int ret;
@ -386,25 +385,16 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
chip->hsu = hsu;
if (!pdata) {
pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
/* Calculate nr_channels from the IO space length */
hsu->nr_channels = (chip->length - chip->offset) / HSU_DMA_CHAN_LENGTH;
chip->pdata = pdata;
/* Guess nr_channels from the IO space length */
pdata->nr_channels = (chip->length - chip->offset) /
HSU_DMA_CHAN_LENGTH;
}
hsu->chan = devm_kcalloc(chip->dev, pdata->nr_channels,
hsu->chan = devm_kcalloc(chip->dev, hsu->nr_channels,
sizeof(*hsu->chan), GFP_KERNEL);
if (!hsu->chan)
return -ENOMEM;
INIT_LIST_HEAD(&hsu->dma.channels);
for (i = 0; i < pdata->nr_channels; i++) {
for (i = 0; i < hsu->nr_channels; i++) {
struct hsu_dma_chan *hsuc = &hsu->chan[i];
hsuc->vchan.desc_free = hsu_dma_desc_free;
@ -440,7 +430,7 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
if (ret)
return ret;
dev_info(chip->dev, "Found HSU DMA, %d channels\n", pdata->nr_channels);
dev_info(chip->dev, "Found HSU DMA, %d channels\n", hsu->nr_channels);
return 0;
}
EXPORT_SYMBOL_GPL(hsu_dma_probe);
@ -452,7 +442,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip)
dma_async_device_unregister(&hsu->dma);
for (i = 0; i < chip->pdata->nr_channels; i++) {
for (i = 0; i < hsu->nr_channels; i++) {
struct hsu_dma_chan *hsuc = &hsu->chan[i];
tasklet_kill(&hsuc->vchan.task);

1
drivers/dma/hsu/hsu.h
View File

@ -107,6 +107,7 @@ struct hsu_dma {
/* channels */
struct hsu_dma_chan *chan;
unsigned short nr_channels;
};
static inline struct hsu_dma *to_hsu_dma(struct dma_device *ddev)

2
drivers/dma/hsu/pci.c
View File

@ -31,7 +31,7 @@ static irqreturn_t hsu_pci_irq(int irq, void *dev)
irqreturn_t ret = IRQ_NONE;
dmaisr = readl(chip->regs + HSU_PCI_DMAISR);
for (i = 0; i < chip->pdata->nr_channels; i++) {
for (i = 0; i < chip->hsu->nr_channels; i++) {
if (dmaisr & 0x1)
ret |= hsu_dma_irq(chip, i);
dmaisr >>= 1;

1
include/linux/dma/hsu.h
View File

@ -35,7 +35,6 @@ struct hsu_dma_chip {
unsigned int length;
unsigned int offset;
struct hsu_dma *hsu;
struct hsu_dma_platform_data *pdata;
};
#if IS_ENABLED(CONFIG_HSU_DMA)

4
include/linux/platform_data/dma-hsu.h
View File

@ -18,8 +18,4 @@ struct hsu_dma_slave {
int chan_id;
};
struct hsu_dma_platform_data {
unsigned short nr_channels;
};
#endif /* _PLATFORM_DATA_DMA_HSU_H */