diff options
Diffstat (limited to 'drivers/dma/apple-admac.c')
| -rw-r--r-- | drivers/dma/apple-admac.c | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/drivers/dma/apple-admac.c b/drivers/dma/apple-admac.c index d1f74a3aa999..317ca76ccafd 100644 --- a/drivers/dma/apple-admac.c +++ b/drivers/dma/apple-admac.c @@ -12,8 +12,9 @@ #include <linux/module.h> #include <linux/of_device.h> #include <linux/of_dma.h> -#include <linux/interrupt.h> +#include <linux/reset.h> #include <linux/spinlock.h> +#include <linux/interrupt.h> #include "dmaengine.h" @@ -95,7 +96,9 @@ struct admac_data { struct dma_device dma; struct device *dev; __iomem void *base; + struct reset_control *rstc; + int irq; int irq_index; int nchannels; struct admac_chan channels[]; @@ -724,18 +727,17 @@ static int admac_probe(struct platform_device *pdev) if (irq < 0) return dev_err_probe(&pdev->dev, irq, "no usable interrupt\n"); - - err = devm_request_irq(&pdev->dev, irq, admac_interrupt, - 0, dev_name(&pdev->dev), ad); - if (err) - return dev_err_probe(&pdev->dev, err, - "unable to register interrupt\n"); + ad->irq = irq; ad->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(ad->base)) return dev_err_probe(&pdev->dev, PTR_ERR(ad->base), "unable to obtain MMIO resource\n"); + ad->rstc = devm_reset_control_get_optional_shared(&pdev->dev, NULL); + if (IS_ERR(ad->rstc)) + return PTR_ERR(ad->rstc); + dma = &ad->dma; dma_cap_set(DMA_PRIVATE, dma->cap_mask); @@ -774,17 +776,38 @@ static int admac_probe(struct platform_device *pdev) tasklet_setup(&adchan->tasklet, admac_chan_tasklet); } - err = dma_async_device_register(&ad->dma); + err = reset_control_reset(ad->rstc); if (err) - return dev_err_probe(&pdev->dev, err, "failed to register DMA device\n"); + return dev_err_probe(&pdev->dev, err, + "unable to trigger reset\n"); + + err = request_irq(irq, admac_interrupt, 0, dev_name(&pdev->dev), ad); + if (err) { + dev_err_probe(&pdev->dev, err, + "unable to register interrupt\n"); + goto free_reset; + } + + err = dma_async_device_register(&ad->dma); + if (err) { + dev_err_probe(&pdev->dev, err, "failed to register DMA device\n"); + goto free_irq; + } err = of_dma_controller_register(pdev->dev.of_node, admac_dma_of_xlate, ad); if (err) { dma_async_device_unregister(&ad->dma); - return dev_err_probe(&pdev->dev, err, "failed to register with OF\n"); + dev_err_probe(&pdev->dev, err, "failed to register with OF\n"); + goto free_irq; } return 0; + +free_irq: + free_irq(ad->irq, ad); +free_reset: + reset_control_rearm(ad->rstc); + return err; } static int admac_remove(struct platform_device *pdev) @@ -793,6 +816,8 @@ static int admac_remove(struct platform_device *pdev) of_dma_controller_free(pdev->dev.of_node); dma_async_device_unregister(&ad->dma); + free_irq(ad->irq, ad); + reset_control_rearm(ad->rstc); return 0; } |