diff options
Diffstat (limited to 'drivers/dma/pl330.c')
| -rw-r--r-- | drivers/dma/pl330.c | 82 |
1 files changed, 10 insertions, 72 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index f5843bc80ba..665668b6f2b 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -23,7 +23,6 @@ #include <linux/dmaengine.h> #include <linux/amba/bus.h> #include <linux/amba/pl330.h> -#include <linux/pm_runtime.h> #include <linux/scatterlist.h> #include <linux/of.h> @@ -522,7 +521,7 @@ enum desc_status { /* In the DMAC pool */ FREE, /* - * Allocted to some channel during prep_xxx + * Allocated to some channel during prep_xxx * Also may be sitting on the work_list. */ PREP, @@ -586,8 +585,6 @@ struct dma_pl330_dmac { /* Peripheral channels connected to this DMAC */ struct dma_pl330_chan *peripherals; /* keep at end */ - - struct clk *clk; }; struct dma_pl330_desc { @@ -2395,7 +2392,7 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan) pch->pl330_chid = pl330_request_channel(&pdmac->pif); if (!pch->pl330_chid) { spin_unlock_irqrestore(&pch->lock, flags); - return 0; + return -ENOMEM; } tasklet_init(&pch->task, pl330_tasklet, (unsigned long) pch); @@ -2685,7 +2682,7 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len) static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic( struct dma_chan *chan, dma_addr_t dma_addr, size_t len, size_t period_len, enum dma_transfer_direction direction, - void *context) + unsigned long flags, void *context) { struct dma_pl330_desc *desc; struct dma_pl330_chan *pch = to_pchan(chan); @@ -2889,29 +2886,17 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) goto probe_err1; } - pdmac->clk = clk_get(&adev->dev, "dma"); - if (IS_ERR(pdmac->clk)) { - dev_err(&adev->dev, "Cannot get operation clock.\n"); - ret = -EINVAL; - goto probe_err2; - } - amba_set_drvdata(adev, pdmac); -#ifndef CONFIG_PM_RUNTIME - /* enable dma clk */ - clk_enable(pdmac->clk); -#endif - irq = adev->irq[0]; ret = request_irq(irq, pl330_irq_handler, 0, dev_name(&adev->dev), pi); if (ret) - goto probe_err3; + goto probe_err2; ret = pl330_add(pi); if (ret) - goto probe_err4; + goto probe_err3; INIT_LIST_HEAD(&pdmac->desc_pool); spin_lock_init(&pdmac->pool_lock); @@ -2933,7 +2918,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) if (!pdmac->peripherals) { ret = -ENOMEM; dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n"); - goto probe_err5; + goto probe_err4; } for (i = 0; i < num_chan; i++) { @@ -2961,6 +2946,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) if (pi->pcfg.num_peri) { dma_cap_set(DMA_SLAVE, pd->cap_mask); dma_cap_set(DMA_CYCLIC, pd->cap_mask); + dma_cap_set(DMA_PRIVATE, pd->cap_mask); } } @@ -2976,7 +2962,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) ret = dma_async_device_register(pd); if (ret) { dev_err(&adev->dev, "unable to register DMAC\n"); - goto probe_err5; + goto probe_err4; } dev_info(&adev->dev, @@ -2989,15 +2975,10 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) return 0; -probe_err5: - pl330_del(pi); probe_err4: - free_irq(irq, pi); + pl330_del(pi); probe_err3: -#ifndef CONFIG_PM_RUNTIME - clk_disable(pdmac->clk); -#endif - clk_put(pdmac->clk); + free_irq(irq, pi); probe_err2: iounmap(pi->base); probe_err1: @@ -3044,10 +3025,6 @@ static int __devexit pl330_remove(struct amba_device *adev) res = &adev->res; release_mem_region(res->start, resource_size(res)); -#ifndef CONFIG_PM_RUNTIME - clk_disable(pdmac->clk); -#endif - kfree(pdmac); return 0; @@ -3063,49 +3040,10 @@ static struct amba_id pl330_ids[] = { MODULE_DEVICE_TABLE(amba, pl330_ids); -#ifdef CONFIG_PM_RUNTIME -static int pl330_runtime_suspend(struct device *dev) -{ - struct dma_pl330_dmac *pdmac = dev_get_drvdata(dev); - - if (!pdmac) { - dev_err(dev, "failed to get dmac\n"); - return -ENODEV; - } - - clk_disable(pdmac->clk); - - return 0; -} - -static int pl330_runtime_resume(struct device *dev) -{ - struct dma_pl330_dmac *pdmac = dev_get_drvdata(dev); - - if (!pdmac) { - dev_err(dev, "failed to get dmac\n"); - return -ENODEV; - } - - clk_enable(pdmac->clk); - - return 0; -} -#else -#define pl330_runtime_suspend NULL -#define pl330_runtime_resume NULL -#endif /* CONFIG_PM_RUNTIME */ - -static const struct dev_pm_ops pl330_pm_ops = { - .runtime_suspend = pl330_runtime_suspend, - .runtime_resume = pl330_runtime_resume, -}; - static struct amba_driver pl330_driver = { .drv = { .owner = THIS_MODULE, .name = "dma-pl330", - .pm = &pl330_pm_ops, }, .id_table = pl330_ids, .probe = pl330_probe, |