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authorNenghua Cao <nhcao@marvell.com>2013-12-13 16:14:31 +0800
committerVinod Koul <vinod.koul@intel.com>2014-01-09 17:46:20 +0530
commit3b0f4a54f247b2b5f2523fab0e6243f76ac80d9f (patch)
tree7de4b00c3408056149b80c4b64e25610b920429f /drivers/dma
parent96286b57669073e81870e33a3e5ce476433d115f (diff)
downloadlinux-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')
-rw-r--r--drivers/dma/mmp_tdma.c22
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;
}