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path: root/drivers/spi/spi-ep93xx.c
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Diffstat (limited to 'drivers/spi/spi-ep93xx.c')
-rw-r--r--drivers/spi/spi-ep93xx.c61
1 files changed, 20 insertions, 41 deletions
diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index 6db2887852d6..f97f1d248800 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -76,7 +76,6 @@
* @clk: clock for the controller
* @regs_base: pointer to ioremap()'d registers
* @sspdr_phys: physical address of the SSPDR register
- * @irq: IRQ number used by the driver
* @min_rate: minimum clock rate (in Hz) supported by the controller
* @max_rate: maximum clock rate (in Hz) supported by the controller
* @running: is the queue running
@@ -114,7 +113,6 @@ struct ep93xx_spi {
struct clk *clk;
void __iomem *regs_base;
unsigned long sspdr_phys;
- int irq;
unsigned long min_rate;
unsigned long max_rate;
bool running;
@@ -545,13 +543,12 @@ static void ep93xx_spi_pio_transfer(struct ep93xx_spi *espi)
* in case of failure.
*/
static struct dma_async_tx_descriptor *
-ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
+ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_transfer_direction dir)
{
struct spi_transfer *t = espi->current_msg->state;
struct dma_async_tx_descriptor *txd;
enum dma_slave_buswidth buswidth;
struct dma_slave_config conf;
- enum dma_transfer_direction slave_dirn;
struct scatterlist *sg;
struct sg_table *sgt;
struct dma_chan *chan;
@@ -567,14 +564,13 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
memset(&conf, 0, sizeof(conf));
conf.direction = dir;
- if (dir == DMA_FROM_DEVICE) {
+ if (dir == DMA_DEV_TO_MEM) {
chan = espi->dma_rx;
buf = t->rx_buf;
sgt = &espi->rx_sgt;
conf.src_addr = espi->sspdr_phys;
conf.src_addr_width = buswidth;
- slave_dirn = DMA_DEV_TO_MEM;
} else {
chan = espi->dma_tx;
buf = t->tx_buf;
@@ -582,7 +578,6 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
conf.dst_addr = espi->sspdr_phys;
conf.dst_addr_width = buswidth;
- slave_dirn = DMA_MEM_TO_DEV;
}
ret = dmaengine_slave_config(chan, &conf);
@@ -633,8 +628,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
if (!nents)
return ERR_PTR(-ENOMEM);
- txd = dmaengine_prep_slave_sg(chan, sgt->sgl, nents,
- slave_dirn, DMA_CTRL_ACK);
+ txd = dmaengine_prep_slave_sg(chan, sgt->sgl, nents, dir, DMA_CTRL_ACK);
if (!txd) {
dma_unmap_sg(chan->device->dev, sgt->sgl, sgt->nents, dir);
return ERR_PTR(-ENOMEM);
@@ -651,12 +645,12 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
* unmapped.
*/
static void ep93xx_spi_dma_finish(struct ep93xx_spi *espi,
- enum dma_data_direction dir)
+ enum dma_transfer_direction dir)
{
struct dma_chan *chan;
struct sg_table *sgt;
- if (dir == DMA_FROM_DEVICE) {
+ if (dir == DMA_DEV_TO_MEM) {
chan = espi->dma_rx;
sgt = &espi->rx_sgt;
} else {
@@ -677,16 +671,16 @@ static void ep93xx_spi_dma_transfer(struct ep93xx_spi *espi)
struct spi_message *msg = espi->current_msg;
struct dma_async_tx_descriptor *rxd, *txd;
- rxd = ep93xx_spi_dma_prepare(espi, DMA_FROM_DEVICE);
+ rxd = ep93xx_spi_dma_prepare(espi, DMA_DEV_TO_MEM);
if (IS_ERR(rxd)) {
dev_err(&espi->pdev->dev, "DMA RX failed: %ld\n", PTR_ERR(rxd));
msg->status = PTR_ERR(rxd);
return;
}
- txd = ep93xx_spi_dma_prepare(espi, DMA_TO_DEVICE);
+ txd = ep93xx_spi_dma_prepare(espi, DMA_MEM_TO_DEV);
if (IS_ERR(txd)) {
- ep93xx_spi_dma_finish(espi, DMA_FROM_DEVICE);
+ ep93xx_spi_dma_finish(espi, DMA_DEV_TO_MEM);
dev_err(&espi->pdev->dev, "DMA TX failed: %ld\n", PTR_ERR(rxd));
msg->status = PTR_ERR(txd);
return;
@@ -705,8 +699,8 @@ static void ep93xx_spi_dma_transfer(struct ep93xx_spi *espi)
wait_for_completion(&espi->wait);
- ep93xx_spi_dma_finish(espi, DMA_TO_DEVICE);
- ep93xx_spi_dma_finish(espi, DMA_FROM_DEVICE);
+ ep93xx_spi_dma_finish(espi, DMA_MEM_TO_DEV);
+ ep93xx_spi_dma_finish(espi, DMA_DEV_TO_MEM);
}
/**
@@ -1035,6 +1029,7 @@ static int __devinit ep93xx_spi_probe(struct platform_device *pdev)
struct ep93xx_spi_info *info;
struct ep93xx_spi *espi;
struct resource *res;
+ int irq;
int error;
info = pdev->dev.platform_data;
@@ -1074,8 +1069,8 @@ static int __devinit ep93xx_spi_probe(struct platform_device *pdev)
espi->min_rate = clk_get_rate(espi->clk) / (254 * 256);
espi->pdev = pdev;
- espi->irq = platform_get_irq(pdev, 0);
- if (espi->irq < 0) {
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
error = -EBUSY;
dev_err(&pdev->dev, "failed to get irq resources\n");
goto fail_put_clock;
@@ -1088,26 +1083,20 @@ static int __devinit ep93xx_spi_probe(struct platform_device *pdev)
goto fail_put_clock;
}
- res = request_mem_region(res->start, resource_size(res), pdev->name);
- if (!res) {
- dev_err(&pdev->dev, "unable to request iomem resources\n");
- error = -EBUSY;
- goto fail_put_clock;
- }
-
espi->sspdr_phys = res->start + SSPDR;
- espi->regs_base = ioremap(res->start, resource_size(res));
+
+ espi->regs_base = devm_request_and_ioremap(&pdev->dev, res);
if (!espi->regs_base) {
dev_err(&pdev->dev, "failed to map resources\n");
error = -ENODEV;
- goto fail_free_mem;
+ goto fail_put_clock;
}
- error = request_irq(espi->irq, ep93xx_spi_interrupt, 0,
- "ep93xx-spi", espi);
+ error = devm_request_irq(&pdev->dev, irq, ep93xx_spi_interrupt,
+ 0, "ep93xx-spi", espi);
if (error) {
dev_err(&pdev->dev, "failed to request irq\n");
- goto fail_unmap_regs;
+ goto fail_put_clock;
}
if (info->use_dma && ep93xx_spi_setup_dma(espi))
@@ -1132,7 +1121,7 @@ static int __devinit ep93xx_spi_probe(struct platform_device *pdev)
}
dev_info(&pdev->dev, "EP93xx SPI Controller at 0x%08lx irq %d\n",
- (unsigned long)res->start, espi->irq);
+ (unsigned long)res->start, irq);
return 0;
@@ -1140,11 +1129,6 @@ fail_free_queue:
destroy_workqueue(espi->wq);
fail_free_dma:
ep93xx_spi_release_dma(espi);
- free_irq(espi->irq, espi);
-fail_unmap_regs:
- iounmap(espi->regs_base);
-fail_free_mem:
- release_mem_region(res->start, resource_size(res));
fail_put_clock:
clk_put(espi->clk);
fail_release_master:
@@ -1158,7 +1142,6 @@ static int __devexit ep93xx_spi_remove(struct platform_device *pdev)
{
struct spi_master *master = platform_get_drvdata(pdev);
struct ep93xx_spi *espi = spi_master_get_devdata(master);
- struct resource *res;
spin_lock_irq(&espi->lock);
espi->running = false;
@@ -1184,10 +1167,6 @@ static int __devexit ep93xx_spi_remove(struct platform_device *pdev)
spin_unlock_irq(&espi->lock);
ep93xx_spi_release_dma(espi);
- free_irq(espi->irq, espi);
- iounmap(espi->regs_base);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
clk_put(espi->clk);
platform_set_drvdata(pdev, NULL);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-11 03:26:00 +0200