Commit 4c97ad99 authored by Heikki Krogerus's avatar Heikki Krogerus Committed by Greg Kroah-Hartman
Browse files

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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: default avatarVinod Koul <vinod.koul@intel.com>
Acked-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 47f82f1a

drivers/dma/hsu/hsu.c

+7 −17
Original line number Diff line number Diff line
@@ -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;



		chip->pdata = pdata;



		/* Guess nr_channels from the IO space length */

		pdata->nr_channels = (chip->length - chip->offset) /

				     HSU_DMA_CHAN_LENGTH;

	}

	/* Calculate nr_channels from the IO space length */

	hsu->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);

drivers/dma/hsu/hsu.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

drivers/dma/hsu/pci.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

include/linux/dma/hsu.h

+0 −1
Original line number Diff line number Diff line
@@ -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)

include/linux/platform_data/dma-hsu.h

+0 −4
Original line number Diff line number Diff line
@@ -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 */

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