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Commit d877a721 authored by Ludovic Desroches's avatar Ludovic Desroches Committed by Wolfram Sang
Browse files

i2c: at91: convert to dma_request_slave_channel_compat() 



Use generic DMA DT helper. Platforms booting with or without DT populated are
both supported.

Signed-off-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Acked-by: default avatarJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 92b775c2

drivers/i2c/busses/i2c-at91.c

+25 −24
Original line number Original line Diff line number Diff line
@@ -605,11 +605,16 @@ static const struct of_device_id atmel_twi_dt_ids[] = { 
MODULE_DEVICE_TABLE(of, atmel_twi_dt_ids);

MODULE_DEVICE_TABLE(of, atmel_twi_dt_ids);

#endif

#endif





static bool filter(struct dma_chan *chan, void *slave)

static bool filter(struct dma_chan *chan, void *pdata)

{

{

	struct at_dma_slave *sl = slave;

	struct at91_twi_pdata *sl_pdata = pdata;

	struct at_dma_slave *sl;





	if (sl->dma_dev == chan->device->dev) {

	if (!sl_pdata)

		return false;



	sl = &sl_pdata->dma_slave;

	if (sl && (sl->dma_dev == chan->device->dev)) {

		chan->private = sl;

		chan->private = sl;

		return true;

		return true;

	} else {

	} else {
@@ -620,11 +625,10 @@ static bool filter(struct dma_chan *chan, void *slave) 
static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr)

static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr)

{

{

	int ret = 0;

	int ret = 0;

	struct at_dma_slave *sdata;

	struct at91_twi_pdata *pdata = dev->pdata;

	struct dma_slave_config slave_config;

	struct dma_slave_config slave_config;

	struct at91_twi_dma *dma = &dev->dma;

	struct at91_twi_dma *dma = &dev->dma;



	dma_cap_mask_t mask;

	sdata = &dev->pdata->dma_slave;





	memset(&slave_config, 0, sizeof(slave_config));

	memset(&slave_config, 0, sizeof(slave_config));

	slave_config.src_addr = (dma_addr_t)phy_addr + AT91_TWI_RHR;

	slave_config.src_addr = (dma_addr_t)phy_addr + AT91_TWI_RHR;
@@ -635,27 +639,24 @@ static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr) 
	slave_config.dst_maxburst = 1;

	slave_config.dst_maxburst = 1;

	slave_config.device_fc = false;

	slave_config.device_fc = false;





	if (sdata && sdata->dma_dev) {

		dma_cap_mask_t mask;



	dma_cap_zero(mask);

	dma_cap_zero(mask);

	dma_cap_set(DMA_SLAVE, mask);

	dma_cap_set(DMA_SLAVE, mask);

		dma->chan_tx = dma_request_channel(mask, filter, sdata);



	dma->chan_tx = dma_request_slave_channel_compat(mask, filter, pdata,

							dev->dev, "tx");

	if (!dma->chan_tx) {

	if (!dma->chan_tx) {

			dev_err(dev->dev, "no DMA channel available for tx\n");

		dev_err(dev->dev, "can't get a DMA channel for tx\n");

		ret = -EBUSY;

		ret = -EBUSY;

		goto error;

		goto error;

	}

	}

		dma->chan_rx = dma_request_channel(mask, filter, sdata);



	dma->chan_rx = dma_request_slave_channel_compat(mask, filter, pdata,

							dev->dev, "rx");

	if (!dma->chan_rx) {

	if (!dma->chan_rx) {

			dev_err(dev->dev, "no DMA channel available for rx\n");

		dev_err(dev->dev, "can't get a DMA channel for rx\n");

		ret = -EBUSY;

		ret = -EBUSY;

		goto error;

		goto error;

	}

	}

	} else {

		ret = -EINVAL;

		goto error;

	}





	slave_config.direction = DMA_MEM_TO_DEV;

	slave_config.direction = DMA_MEM_TO_DEV;

	if (dmaengine_slave_config(dma->chan_tx, &slave_config)) {

	if (dmaengine_slave_config(dma->chan_tx, &slave_config)) {