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dmaengine: hsu: remove platform data

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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
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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 */