diff options
| author | Alexandre Bailon <abailon@baylibre.com> | 2017-02-15 14:56:35 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-03-07 09:08:25 +0100 |
| commit | 5e46fe98ab658eab817398abd895908854bb4c43 (patch) | |
| tree | 9b15e7485f4b5221e2a008fe8cc33aed5f8360fd /drivers/dma | |
| parent | dmaengine: cppi41: Move some constants to glue layer (diff) | |
| download | linux-5e46fe98ab658eab817398abd895908854bb4c43.tar.xz linux-5e46fe98ab658eab817398abd895908854bb4c43.zip | |
dmaengine: cppi41: init_sched(): Get number of channels from DT
Despite the driver is already using DT to get the number of channels,
init_sched() is using an hardcoded value to get it.
Use DT to get the number of channels.
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/cppi41.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c index 676228ff71de..54337cd0afcc 100644 --- a/drivers/dma/cppi41.c +++ b/drivers/dma/cppi41.c @@ -139,6 +139,8 @@ struct cppi41_dd { struct chan_queues td_queue; u16 first_completion_queue; u16 qmgr_num_pend; + u32 n_chans; + u8 platform; struct list_head pending; /* Pending queued transfers */ spinlock_t lock; /* Lock for pending list */ @@ -742,13 +744,8 @@ static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd) { struct cppi41_channel *cchan; int i; - int ret; - u32 n_chans; + u32 n_chans = cdd->n_chans; - ret = of_property_read_u32(dev->of_node, "#dma-channels", - &n_chans); - if (ret) - return ret; /* * The channels can only be used as TX or as RX. So we add twice * that much dma channels because USB can only do RX or TX. @@ -862,7 +859,7 @@ static void init_sched(struct cppi41_dd *cdd) word = 0; cppi_writel(0, cdd->sched_mem + DMA_SCHED_CTRL); - for (ch = 0; ch < 15 * 2; ch += 2) { + for (ch = 0; ch < cdd->n_chans; ch += 2) { reg = SCHED_ENTRY0_CHAN(ch); reg |= SCHED_ENTRY1_CHAN(ch) | SCHED_ENTRY1_IS_RX; @@ -872,7 +869,7 @@ static void init_sched(struct cppi41_dd *cdd) cppi_writel(reg, cdd->sched_mem + DMA_SCHED_WORD(word)); word++; } - reg = 15 * 2 * 2 - 1; + reg = cdd->n_chans * 2 - 1; reg |= DMA_SCHED_CTRL_EN; cppi_writel(reg, cdd->sched_mem + DMA_SCHED_CTRL); } @@ -897,6 +894,7 @@ static int init_cppi41(struct device *dev, struct cppi41_dd *cdd) cppi_writel(cdd->td_queue.submit, cdd->ctrl_mem + DMA_TDFDQ); init_sched(cdd); + return 0; err_td: deinit_cppi41(dev, cdd); @@ -1058,6 +1056,11 @@ static int cppi41_dma_probe(struct platform_device *pdev) cdd->qmgr_num_pend = glue_info->qmgr_num_pend; cdd->first_completion_queue = glue_info->first_completion_queue; + ret = of_property_read_u32(dev->of_node, + "#dma-channels", &cdd->n_chans); + if (ret) + goto err_get_n_chans; + ret = init_cppi41(dev, cdd); if (ret) goto err_init_cppi; @@ -1100,6 +1103,7 @@ err_chans: deinit_cppi41(dev, cdd); err_init_cppi: pm_runtime_dont_use_autosuspend(dev); +err_get_n_chans: err_get_sync: pm_runtime_put_sync(dev); pm_runtime_disable(dev); |