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dmaengine: dw: register IRQ and DMA pool with instance ID 

It is really useful not only for debugging to have an IRQ line and DMA
pool labeled with driver and its instance ID. Do this for DesignWare DMA
driver.

All current users of this IP would be enhanced later on.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2017-01-17 13:57:26 +02:00 committed by Vinod Koul
parent a46a763401
commit 08d62f58aa
5 changed files with 10 additions and 2 deletions
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7
drivers/dma/dw/core.c
View File

@ -1502,8 +1502,11 @@ int dw_dma_probe(struct dw_dma_chip *chip)
/* Force dma off, just in case */
dw_dma_off(dw);
/* Device and instance ID for IRQ and DMA pool */
snprintf(dw->name, sizeof(dw->name), "dw:dmac%d", chip->id);
/* Create a pool of consistent memory blocks for hardware descriptors */
dw->desc_pool = dmam_pool_create("dw_dmac_desc_pool", chip->dev,
dw->desc_pool = dmam_pool_create(dw->name, chip->dev,
sizeof(struct dw_desc), 4, 0);
if (!dw->desc_pool) {
dev_err(chip->dev, "No memory for descriptors dma pool\n");
@ -1514,7 +1517,7 @@ int dw_dma_probe(struct dw_dma_chip *chip)
tasklet_init(&dw->tasklet, dw_dma_tasklet, (unsigned long)dw);
err = request_irq(chip->irq, dw_dma_interrupt, IRQF_SHARED,
"dw_dmac", dw);
dw->name, dw);
if (err)
goto err_pdata;

1
drivers/dma/dw/pci.c
View File

@ -47,6 +47,7 @@ static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
return -ENOMEM;
chip->dev = &pdev->dev;
chip->id = pdev->devfn;
chip->regs = pcim_iomap_table(pdev)[0];
chip->irq = pdev->irq;
chip->pdata = pdata;

1
drivers/dma/dw/platform.c
View File

@ -202,6 +202,7 @@ static int dw_probe(struct platform_device *pdev)
pdata = dw_dma_parse_dt(pdev);
chip->dev = dev;
chip->id = pdev->id;
chip->pdata = pdata;
chip->clk = devm_clk_get(chip->dev, "hclk");

1
drivers/dma/dw/regs.h
View File

@ -270,6 +270,7 @@ static inline struct dw_dma_chan *to_dw_dma_chan(struct dma_chan *chan)
struct dw_dma {
struct dma_device dma;
char name[20];
void __iomem *regs;
struct dma_pool *desc_pool;
struct tasklet_struct tasklet;

2
include/linux/dma/dw.h
View File

@ -23,6 +23,7 @@ struct dw_dma;
/**
* struct dw_dma_chip - representation of DesignWare DMA controller hardware
* @dev: struct device of the DMA controller
* @id: instance ID
* @irq: irq line
* @regs: memory mapped I/O space
* @clk: hclk clock
@ -31,6 +32,7 @@ struct dw_dma;
*/
struct dw_dma_chip {
struct device *dev;
int id;
int irq;
void __iomem *regs;
struct clk *clk;