diff options
| author | Nenghua Cao <nhcao@marvell.com> | 2013-12-13 16:14:31 +0800 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-01-09 17:46:20 +0530 |
| commit | 3b0f4a54f247b2b5f2523fab0e6243f76ac80d9f (patch) | |
| tree | 7de4b00c3408056149b80c4b64e25610b920429f /drivers/dma/mmp_tdma.c | |
| parent | 96286b57669073e81870e33a3e5ce476433d115f (diff) | |
| download | linux-3b0f4a54f247b2b5f2523fab0e6243f76ac80d9f.tar.bz2 | |
dma:mmp_tdma: get sram pool through device tree
Support to get sram pool from generic device tree binding. The
existing way of get sram poll, directly call sram_get_gpool(), still
work here.
Signed-off-by: Nenghua Cao <nhcao@marvell.com>
Acked-by: Zhangfei Gao <zhangfei.gao@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/mmp_tdma.c')
| -rw-r--r-- | drivers/dma/mmp_tdma.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c index d4b730ce0369..33f96aaa80c7 100644 --- a/drivers/dma/mmp_tdma.c +++ b/drivers/dma/mmp_tdma.c @@ -126,6 +126,8 @@ struct mmp_tdma_chan { size_t buf_len; size_t period_len; size_t pos; + + struct gen_pool *pool; }; #define TDMA_CHANNEL_NUM 2 @@ -324,7 +326,7 @@ static void mmp_tdma_free_descriptor(struct mmp_tdma_chan *tdmac) struct gen_pool *gpool; int size = tdmac->desc_num * sizeof(struct mmp_tdma_desc); - gpool = sram_get_gpool("asram"); + gpool = tdmac->pool; if (tdmac->desc_arr) gen_pool_free(gpool, (unsigned long)tdmac->desc_arr, size); @@ -374,7 +376,7 @@ struct mmp_tdma_desc *mmp_tdma_alloc_descriptor(struct mmp_tdma_chan *tdmac) struct gen_pool *gpool; int size = tdmac->desc_num * sizeof(struct mmp_tdma_desc); - gpool = sram_get_gpool("asram"); + gpool = tdmac->pool; if (!gpool) return NULL; @@ -505,7 +507,8 @@ static int mmp_tdma_remove(struct platform_device *pdev) } static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev, - int idx, int irq, int type) + int idx, int irq, + int type, struct gen_pool *pool) { struct mmp_tdma_chan *tdmac; @@ -527,6 +530,7 @@ static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev, tdmac->idx = idx; tdmac->type = type; tdmac->reg_base = tdev->base + idx * 4; + tdmac->pool = pool; tdmac->status = DMA_COMPLETE; tdev->tdmac[tdmac->idx] = tdmac; tasklet_init(&tdmac->tasklet, dma_do_tasklet, (unsigned long)tdmac); @@ -553,6 +557,7 @@ static int mmp_tdma_probe(struct platform_device *pdev) int i, ret; int irq = 0, irq_num = 0; int chan_num = TDMA_CHANNEL_NUM; + struct gen_pool *pool; of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev); if (of_id) @@ -579,6 +584,15 @@ static int mmp_tdma_probe(struct platform_device *pdev) INIT_LIST_HEAD(&tdev->device.channels); + if (pdev->dev.of_node) + pool = of_get_named_gen_pool(pdev->dev.of_node, "asram", 0); + else + pool = sram_get_gpool("asram"); + if (!pool) { + dev_err(&pdev->dev, "asram pool not available\n"); + return -ENOMEM; + } + if (irq_num != chan_num) { irq = platform_get_irq(pdev, 0); ret = devm_request_irq(&pdev->dev, irq, @@ -590,7 +604,7 @@ static int mmp_tdma_probe(struct platform_device *pdev) /* initialize channel parameters */ for (i = 0; i < chan_num; i++) { irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i); - ret = mmp_tdma_chan_init(tdev, i, irq, type); + ret = mmp_tdma_chan_init(tdev, i, irq, type, pool); if (ret) return ret; } |